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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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AA-sized conductor (fake battery) wanted
Hello all NG
I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help |
#2
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AA-sized conductor (fake battery) wanted
Eldor Inscribed thus:
Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? -- Best Regards: Baron. |
#3
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AA-sized conductor (fake battery) wanted
On 1/13/2011 4:01 AM, Eldor wrote:
Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Many handheld radios are equipped with exactly this sort of thing (i.e., I have a couple of such radios, each with a pair of die-cast "fake batteries" -- nothing more than 0 ohm spacers). This allows different battery technologies to be used in the radio. You could fabricate one using a length of copper pipe with suitable "end caps" soldered on. Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help |
#4
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AA-sized conductor (fake battery) wanted
On 1/13/2011 4:24 AM, baron wrote:
Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : |
#5
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AA-sized conductor (fake battery) wanted
On Thu, 13 Jan 2011 12:01:01 +0100 Eldor wrote in
Message id: s.com: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help How about this: http://www.amazon.com/Quantum-ES2-Du.../dp/B0000C5RR8 http://www.bhphotovideo.com/c/produc...rgy_Saver.html |
#6
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AA-sized conductor (fake battery) wanted
How about this:
http://www.amazon.com/Quantum-ES2-Du.../dp/B0000C5RR8 http://www.bhphotovideo.com/c/produc...rgy_Saver.html These would obviously do what the OP wanted -- though the price is not right. One might solder lengths of copper tubing (which you can get at hobby stores) to metal disks -- but I don't know how sturdy they'd be. WARNING! The following is off-topic -- but worth thinking about. These dummy cells are supposed to be energy savers, because they let you use only three AA alkaline cells in a four-cell flash. This works, because most flashes operate correctly with nicad or NiMH cells, which are nominally 1.25V (rather than the 1.5V of alkalines). However, this is a great way to waste money -- and not just the cost of the dummy cell. With only three cells in the flash, you won't be able to discharge them to as low a voltage as you would with four. That means you'll have to discard them sooner, and you'll get less total energy out of them. |
#7
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AA-sized conductor (fake battery) wanted
On Thu, 13 Jan 2011 04:57:10 -0700, D Yuniskis
wrote: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : It is if you start with a piece of 18 AWG wire in the center! |
#8
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AA-sized conductor (fake battery) wanted
I was going to suggest searching for Dummy AA Battery, but then another
reply already has. That Shack store used to supply those with some of their products.. you might see if they can get them for you. D Yuniskis' comment refers to a fairly common usage, the dummy cells first became popular when AA nicads batteries became commonly available. Many portable devices were capable of being powered by AA cells, and since nicad cells were only 1.2V, it required 10 of 'em to operate a device where 8 non-rechargeable cells of 1.5V would be adequate. So, the equipment manufacturers made the dummy AA "fillers" available to give the user the option of using nicads or conventional cells. I believe all of the dummies that I've seen have been simple single-piece zinc/aluminum alloy diecast items, with round ends and a flat bar center section to make them more lightweight and cheaper to produce (using less metal). In recent years, when I've needed such fillers, I've formed them out of heavy gage solid copper wire. I'll start with a close spiral forming a flat disc shape, then move away from it and form another one (with a center pip) at the other end. A straight section in the center, separating two round flat discs the same length as a AA cell. Any metal washers or discs of the correct diameter with a rigid center separator could be soldered together faster than forming one from solid 12 ga wire. Brass, copper or plated steel parts would be adequate, and the center doesn't need to be cylindrical. When I was making an external power adapter for a camera, 4 AA cells were arranged in 2 lengthwise pairs (4 cells, 2x2), so I used some nylon rod the same diameter as the cells. I used a plated brass disk for the (-) terminal, and an end cap from a glass fuse for the (+) top terminal. -- Cheers, WB .............. "Eldor" wrote in message anews.com... Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help |
#9
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AA-sized conductor (fake battery) wanted
WARNING! The following is off-topic -- but worth thinking about.
These dummy cells are supposed to be energy savers, because they let you use only three AA alkaline cells in a four-cell flash. This works, because most flashes operate correctly with nicad or NiMH cells, which are nominally 1.25V (rather than the 1.5V of alkalines). However, this is a great way to waste money -- and not just the cost of the dummy cell. With only three cells in the flash, you won't be able to discharge them to as low a voltage as you would with four. That means you'll have to discard them sooner, and you'll get less total energy out of them. I just called Quantum, and found out that these actually aren't "energy savers" at all. In fact, there might be circuitry in them (which is why there are two models). If you own a Canon flash (I assume Nikons are the same) and have read the wretched manual, you know that, when using an external power pack, you must leave the AA cells in the flash, because they continue to power the control circuitry. It appears that going from 4 cells to 3 reduces the drain on the cells, and presumably extends their life. |
#10
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AA-sized conductor (fake battery) wanted
Eldor wrote in
anews.com: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help get a dowel of the same diameter as your batteries,cut to length of each cell,cut a groove down the side,and put a copper wire in it,folded over and curled around at the ends. if you wish,you can get fancy and epoxy the wire down. -- Jim Yanik jyanik at localnet dot com |
#11
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AA-sized conductor (fake battery) wanted
In article s.com,
Eldor wrote: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help As an alternative, Radio Shack and other suppliers have AA and AAA battery holders, in say 3-cell and 4-cell configurations, with movable contacts. This permits you to use different numbers of cells, or choose between parallel and series configurations, just by slipping the stamped metal contacts out of one groove and into another. I designed a little gadget for a customer using a 4-cell AAA unit. I set it up for 3-cell operation, and use the 4th slot for a small circuit board. The boxes come with a cover and an integral ON-OFF switch. Pretty handy. They're about $2 each at Radio Shack, and I pay about a $1 each in 100 pc. qty. from Mouser, etc. |
#12
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AA-sized conductor (fake battery) wanted
On Thu, 13 Jan 2011 12:01:01 +0100, Eldor wrote:
I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. Find a dead AA battery. Make sure it's totally discharged. Wrap with aluminum foil. Instant shorted battery. If you want elegance, take a brass or aluminum shaft that's the same diameter as the AA positive tip. Build up the diameter until it's the same size as the AA outer diameter with cardboard, Duct Tape, or some combination thereof. Maybe a wooden dowel center drilled for the metal rod. Hide everything under some nice looking shrink tube. You may need a wider negative contact area depending on the holder, so adding a brass washer at the base might be useful. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#13
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AA-sized conductor (fake battery) wanted
On Jan 13, 6:17*am, Jim Yanik wrote:
Eldor wrote ctanews.com: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help get a dowel of the same diameter as your batteries,cut to length of each cell,cut a groove down the side,and put a copper wire in it,folded over and curled around at the ends. if you wish,you can get fancy and epoxy the wire down. -- Jim Yanik jyanik at localnet dot com get a dowel of the same diameter as your batteries,cut to length of each cell,cut a groove down the side,and put a copper wire in it,folded over and curled around at the ends. if you wish,you can get fancy and epoxy the wire down. -- Jim Yanik Or drill a hole up the centre and put a nail through it cut accurately to length. Neil S. |
#14
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" -- Best Regards: Baron. |
#15
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AA-sized conductor (fake battery) wanted
On Thu, 13 Jan 2011 12:01:01 +0100, Eldor wrote:
Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Radio Shack used to sell them. -- Live Fast, Die Young and Leave a Pretty Corpse |
#16
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AA-sized conductor (fake battery) wanted
On 1/13/2011 1:46 PM, Baron wrote:
D Yuniskis Inscribed thus: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" Wrapping the foil might be tricky -- especially if it *is* "foil" -- since you want a durable and reliable contact surface yet can't really tolerate lumps, bumps, etc. "Shrink-wrap-aluminum"! Now *that* would be an idea! : (not "shrink-WRAPPED-aluminum") The ideal would be to turn a length of copper dowel to the correct profile and then encase in shrink wrap. But, I suspect the OP doesn't have access to a lathe (though many people *have* lathes so "asking around" could be an option -- note that the profile is probably published as a standard someplace so it's just a matter of getting someone to give you 3 minutes of time on a lathe). My "dummy cells" look like "I" beams in cross section. I.e., imagine the top and bottom 1/10th of an inch of a cell joined by a thick *sheet* of metal. Very obviously castings and saved on material by not making them solid cylinders. |
#17
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AA-sized conductor (fake battery) wanted
On Thu, 13 Jan 2011 12:01:01 +0100, the renowned Eldor
wrote: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help You could probably adapt a AAA-AA adapter pretty easily. Cost $1 each from China a couple at a time. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#18
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AA-sized conductor (fake battery) wanted
"Eldor" wrote in message anews.com... Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Check at Home Depot for aluminum rod. http://www.homedepot.com/webapp/wcs/...atalogId=10053 Larry |
#19
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AA-sized conductor (fake battery) wanted
Thank you, thank you everybody, it's enough :-)))
Now I have a few things to try!! :-D |
#20
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/13/2011 1:46 PM, Baron wrote: D Yuniskis Inscribed thus: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" Wrapping the foil might be tricky -- especially if it *is* "foil" -- since you want a durable and reliable contact surface yet can't really tolerate lumps, bumps, etc. "Shrink-wrap-aluminum"! Now *that* would be an idea! : (not "shrink-WRAPPED-aluminum") I've actually used rolled up cardboard and wrapped aluminium cooking foil round it, folding the ends over to make contact surfaces. It works quite well. I imagine that its current carrying capacity would be quite low. The ideal would be to turn a length of copper dowel to the correct profile and then encase in shrink wrap. But, I suspect the OP doesn't have access to a lathe (though many people *have* lathes so "asking around" could be an option -- note that the profile is probably published as a standard someplace so it's just a matter of getting someone to give you 3 minutes of time on a lathe). Actually a hacksaw and a short length of 0.5" or 13.0mm bar/rod cut to 2" or 51mm long would do ! My "dummy cells" look like "I" beams in cross section. I.e., imagine the top and bottom 1/10th of an inch of a cell joined by a thick *sheet* of metal. Very obviously castings and saved on material by not making them solid cylinders. I've seen something similar made from mazak alloy. -- Best Regards: Baron. |
#21
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AA-sized conductor (fake battery) wanted
D Yuniskis wrote: On 1/13/2011 1:46 PM, Baron wrote: D Yuniskis Inscribed thus: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" Wrapping the foil might be tricky -- especially if it *is* "foil" -- since you want a durable and reliable contact surface yet can't really tolerate lumps, bumps, etc. "Shrink-wrap-aluminum"! Now *that* would be an idea! : (not "shrink-WRAPPED-aluminum") The ideal would be to turn a length of copper dowel to the correct profile and then encase in shrink wrap. But, I suspect the OP doesn't have access to a lathe (though many people *have* lathes so "asking around" could be an option -- note that the profile is probably published as a standard someplace so it's just a matter of getting someone to give you 3 minutes of time on a lathe). Why do you need a lathe? Just use a piece of drill rod the right length, and insulate it if there is any chance of a short in the holder. It isn't expensive and comes in a lot of sizes: http://www.fastenal.com/web/products.ex?N=0&Ntk=Search+All&Ntt=drill+rod&Ntx=m ode+matchallpartial&Nty=1&searchBox=1 You could get some scrap 6 AWG solid copper wire and wrap it with paper to make it the right size, if you don't want to use steel. A piece of wood dowel, two brass screws and a piece of wire run from end to end is the traditional method. My "dummy cells" look like "I" beams in cross section. I.e., imagine the top and bottom 1/10th of an inch of a cell joined by a thick *sheet* of metal. Very obviously castings and saved on material by not making them solid cylinders. -- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated. |
#22
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AA-sized conductor (fake battery) wanted
"Eldor" wrote in message anews.com... Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Use a whiskered (shorted) NiCd cell. |
#23
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AA-sized conductor (fake battery) wanted
On 1/14/2011 6:26 AM, baron wrote:
D Yuniskis Inscribed thus: On 1/13/2011 1:46 PM, Baron wrote: D Yuniskis Inscribed thus: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" Wrapping the foil might be tricky -- especially if it *is* "foil" -- since you want a durable and reliable contact surface yet can't really tolerate lumps, bumps, etc. "Shrink-wrap-aluminum"! Now *that* would be an idea! : (not "shrink-WRAPPED-aluminum") I've actually used rolled up cardboard and wrapped aluminium cooking foil round it, folding the ends over to make contact surfaces. It works quite well. I imagine that its current carrying capacity would be quite low. The ideal would be to turn a length of copper dowel to the correct profile and then encase in shrink wrap. But, I suspect the OP doesn't have access to a lathe (though many people *have* lathes so "asking around" could be an option -- note that the profile is probably published as a standard someplace so it's just a matter of getting someone to give you 3 minutes of time on a lathe). Actually a hacksaw and a short length of 0.5" or 13.0mm bar/rod cut to 2" or 51mm long would do ! My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) |
#24
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AA-sized conductor (fake battery) wanted
"Ian Field" wrote in
: "Eldor" wrote in message anews.com... Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Use a whiskered (shorted) NiCd cell. that could LEAK electrolyte. Better to just cut a dowel to size,cut a slot for a wire from end to end,fold over the ends,maybe epoxy in place. Cheap,easy. follows the KISS principle. -- Jim Yanik jyanik at localnet dot com |
#25
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AA-sized conductor (fake battery) wanted
The dowel and wire would be the most easily fabricated/accomplished for most
handy folks, I think. If some cells are arranged end-to-end in the equipment's battery holder, placing the dowel version between 2 other cells would eliminate the need for a more sophisticated top and bottom terminal, which some battery holders actually require. Additionally, it's about as lightweight as can be, and durable (won't collapse or leak, etc). -- Cheers, WB .............. "Jim Yanik" wrote in message 4... Better to just cut a dowel to size,cut a slot for a wire from end to end,fold over the ends,maybe epoxy in place. Cheap,easy. follows the KISS principle. -- Jim Yanik jyanik at localnet dot com |
#26
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/14/2011 6:26 AM, baron wrote: D Yuniskis Inscribed thus: On 1/13/2011 1:46 PM, Baron wrote: D Yuniskis Inscribed thus: On 1/13/2011 4:24 AM, baron wrote: Eldor Inscribed thus: Hello all NG I am looking for a fake AA battery, i.e. a conductor of the same size, so that I can put it in an AA battery holder and have a lower voltage (N-1 x 1.5V) . Actually I want multiple of them so that I can make a "configurable voltage" battery. I have looked around but I can't find it. Does anybody know any? Alternatively I could look for a battery which can be charged at various voltage levels, but it needs to hold a significant charge at any voltage level. I don't think it exists. Thanks for any help Whats wrong with a piece of rolled up cardboard ? Cardboard isn't a very good conductor at low voltages : Sorry ! My brain fart :-( I meant to write "Whats wrong with a piece of alloy foil wrapped over rolled up cardboard ?" Wrapping the foil might be tricky -- especially if it *is* "foil" -- since you want a durable and reliable contact surface yet can't really tolerate lumps, bumps, etc. "Shrink-wrap-aluminum"! Now *that* would be an idea! : (not "shrink-WRAPPED-aluminum") I've actually used rolled up cardboard and wrapped aluminium cooking foil round it, folding the ends over to make contact surfaces. It works quite well. I imagine that its current carrying capacity would be quite low. The ideal would be to turn a length of copper dowel to the correct profile and then encase in shrink wrap. But, I suspect the OP doesn't have access to a lathe (though many people *have* lathes so "asking around" could be an option -- note that the profile is probably published as a standard someplace so it's just a matter of getting someone to give you 3 minutes of time on a lathe). Actually a hacksaw and a short length of 0.5" or 13.0mm bar/rod cut to 2" or 51mm long would do ! My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Us mechanical engineer types take great pride in our hobbies ! :-) Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) Ah ! In that case you would need to turn it to produce the pip on one end. -- Best Regards: Baron. |
#27
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AA-sized conductor (fake battery) wanted
On 1/15/2011 10:46 AM, Baron wrote:
My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Us mechanical engineer types take great pride in our hobbies ! :-) Well, *he's* the mechanical type: lathe, end mill, surface grinder, shadow graph, coil winder, etc. Of course, another friend has a sinker EDM and a couple of wire EDM machines... a bit too expensive to qualify as "toys" :-/ Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) Ah ! In that case you would need to turn it to produce the pip on one end. Yes, that was why I suggested the lathe instead of just cutting drill rod, etc. Though, with copper, I think you could *almost* use a file as "cutting tool" and a large electric (hand) drill to spin the work. Wouldn't have much control over the dimension of the pip but I suspect you could fashion a functional one in a few minutes. Heck, even putting a slight taper on the one end would work! |
#28
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/15/2011 10:46 AM, Baron wrote: My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Us mechanical engineer types take great pride in our hobbies ! :-) Well, *he's* the mechanical type: lathe, end mill, surface grinder, shadow graph, coil winder, etc. Of course, another friend has a sinker EDM and a couple of wire EDM machines... a bit too expensive to qualify as "toys" :-/ Ooo ! I feel the green eyed monster coming on. :-) Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) Ah ! In that case you would need to turn it to produce the pip on one end. Yes, that was why I suggested the lathe instead of just cutting drill rod, etc. I wasn't aware of that limitation. Though my son just pointed out the battery holder in the Wii was shaped so you couldn't put the battery in backwards. Though, with copper, I think you could *almost* use a file as "cutting tool" and a large electric (hand) drill to spin the work. Wouldn't have much control over the dimension of the pip but I suspect you could fashion a functional one in a few minutes. Heck, even putting a slight taper on the one end would work! Very true ! A trick I've used to clean up the end of damaged bolts. -- Best Regards: Baron. |
#29
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AA-sized conductor (fake battery) wanted
On 1/15/2011 2:20 PM, Baron wrote:
D Yuniskis Inscribed thus: On 1/15/2011 10:46 AM, Baron wrote: My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Us mechanical engineer types take great pride in our hobbies ! :-) Well, *he's* the mechanical type: lathe, end mill, surface grinder, shadow graph, coil winder, etc. Of course, another friend has a sinker EDM and a couple of wire EDM machines... a bit too expensive to qualify as "toys" :-/ Ooo ! I feel the green eyed monster coming on. :-) Yeah, when I hear complaints about all of my crap ^H^H^H er, *toys*, I think about *these* sorts of things! : The first friend (above) gave me a 3KW FERRUPS (UPS) one day. I was trying to figure out how to get it *into* the truck (weighed a couple hundred pounds... the batteries alone weighed more than 100 pounds). He "disappeared". And came back a few minutes later with a front-end loader, scooped the UPS into the bucket and dropped it onto the truck. Sheesh! Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) Ah ! In that case you would need to turn it to produce the pip on one end. Yes, that was why I suggested the lathe instead of just cutting drill rod, etc. I wasn't aware of that limitation. Though my son just pointed out the battery holder in the Wii was shaped so you couldn't put the battery in backwards. Yes. It's the same sort of problem you face with "untabbed" NiCd or Li cells. They don't always want to conduct abutted "end to end". Though, with copper, I think you could *almost* use a file as "cutting tool" and a large electric (hand) drill to spin the work. Wouldn't have much control over the dimension of the pip but I suspect you could fashion a functional one in a few minutes. Heck, even putting a slight taper on the one end would work! Very true ! A trick I've used to clean up the end of damaged bolts. |
#30
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AA-sized conductor (fake battery) wanted
Baron wrote: Very true ! A trick I've used to clean up the end of damaged bolts. How rebolting! ;-) -- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated. |
#31
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/15/2011 2:20 PM, Baron wrote: D Yuniskis Inscribed thus: On 1/15/2011 10:46 AM, Baron wrote: My comment was intended more as "tongue-in-cheek" (I have a friend that I *never* ask for things like this as he *would* turn something on a lathe for me and I often end up embarassed at the "excessive quality" of his solution! : ) Us mechanical engineer types take great pride in our hobbies ! :-) Well, *he's* the mechanical type: lathe, end mill, surface grinder, shadow graph, coil winder, etc. Of course, another friend has a sinker EDM and a couple of wire EDM machines... a bit too expensive to qualify as "toys" :-/ Ooo ! I feel the green eyed monster coming on. :-) Yeah, when I hear complaints about all of my crap ^H^H^H er, *toys*, I think about *these* sorts of things! : The first friend (above) gave me a 3KW FERRUPS (UPS) one day. I was trying to figure out how to get it *into* the truck (weighed a couple hundred pounds... the batteries alone weighed more than 100 pounds). He "disappeared". And came back a few minutes later with a front-end loader, scooped the UPS into the bucket and dropped it onto the truck. Sheesh! Indeed. :-) In my case it would still be in the truck. Some batteries (against which the "dummy" may mate) require the little "nub" on the + end to ensure contact. Likewise, some battery holders "guard" the + terminal with a bit of raised plastic to protect against a battery installed backwards. (i.e., a "flat surface" -- like the - terminal -- won't connect) Ah ! In that case you would need to turn it to produce the pip on one end. Yes, that was why I suggested the lathe instead of just cutting drill rod, etc. I wasn't aware of that limitation. Though my son just pointed out the battery holder in the Wii was shaped so you couldn't put the battery in backwards. Yes. It's the same sort of problem you face with "untabbed" NiCd or Li cells. They don't always want to conduct abutted "end to end". Though, with copper, I think you could *almost* use a file as "cutting tool" and a large electric (hand) drill to spin the work. Wouldn't have much control over the dimension of the pip but I suspect you could fashion a functional one in a few minutes. Heck, even putting a slight taper on the one end would work! Very true ! A trick I've used to clean up the end of damaged bolts. -- Best Regards: Baron. |
#32
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AA-sized conductor (fake battery) wanted
On 1/15/2011 9:28 PM Michael A. Terrell spake thus:
Baron wrote: Very true ! A trick I've used to clean up the end of damaged bolts. How rebolting! ;-) Aaaaaah, the guy's nuts I say. Cross-threaded between the ears. Tapped out, ready to die. -- Comment on quaint Usenet customs, from Usenet: To me, the *plonk...* reminds me of the old man at the public hearing who stands to make his point, then removes his hearing aid as a sign that he is not going to hear any rebuttals. |
#33
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AA-sized conductor (fake battery) wanted
David Nebenzahl Inscribed thus:
On 1/15/2011 9:28 PM Michael A. Terrell spake thus: Baron wrote: Very true ! A trick I've used to clean up the end of damaged bolts. How rebolting! ;-) Aaaaaah, the guy's nuts I say. Cross-threaded between the ears. Tapped out, ready to die. Ooo Nasty. ;-) -- Best Regards: Baron. |
#34
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AA-sized conductor (fake battery) wanted
Baron wrote: D Yuniskis Inscribed thus: Yeah, when I hear complaints about all of my crap ^H^H^H er, *toys*, I think about *these* sorts of things! : The first friend (above) gave me a 3KW FERRUPS (UPS) one day. I was trying to figure out how to get it *into* the truck (weighed a couple hundred pounds... the batteries alone weighed more than 100 pounds). He "disappeared". And came back a few minutes later with a front-end loader, scooped the UPS into the bucket and dropped it onto the truck. Sheesh! Indeed. :-) In my case it would still be in the truck. You need one of these! http://www.harborfreight.com/1000-lb-capacity-hydraulic-scissor-table-cart-93116.html -- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated. |
#35
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AA-sized conductor (fake battery) wanted
David Nebenzahl wrote: On 1/15/2011 9:28 PM Michael A. Terrell spake thus: Baron wrote: Very true ! A trick I've used to clean up the end of damaged bolts. How rebolting! ;-) Aaaaaah, the guy's nuts I say. Cross-threaded between the ears. Tapped out, ready to die. Left hand thread in a right handed world! -- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated. |
#36
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AA-sized conductor (fake battery) wanted
Michael A. Terrell Inscribed thus:
Baron wrote: D Yuniskis Inscribed thus: Yeah, when I hear complaints about all of my crap ^H^H^H er, *toys*, I think about *these* sorts of things! : The first friend (above) gave me a 3KW FERRUPS (UPS) one day. I was trying to figure out how to get it *into* the truck (weighed a couple hundred pounds... the batteries alone weighed more than 100 pounds). He "disappeared". And came back a few minutes later with a front-end loader, scooped the UPS into the bucket and dropped it onto the truck. Sheesh! Indeed. :-) In my case it would still be in the truck. You need one of these! http://www.harborfreight.com/1000-lb-capacity-hydraulic-scissor-table-cart-93116.html Hey that looks nice ! Don't know what I would do with it ! But it looks nice. -- Best Regards: Baron. |
#37
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AA-sized conductor (fake battery) wanted
Michael A. Terrell Inscribed thus:
David Nebenzahl wrote: On 1/15/2011 9:28 PM Michael A. Terrell spake thus: Baron wrote: Very true ! A trick I've used to clean up the end of damaged bolts. How rebolting! ;-) Aaaaaah, the guy's nuts I say. Cross-threaded between the ears. Tapped out, ready to die. Left hand thread in a right handed world! That reminds me of a little tale. Many many years ago, an apprentice was given the task of drilling some holes in a piece of metal. He was given a drill of the right size and told to get on with it. He came back quite some time later with a very badly burnt and blunted drill, a piece of metal with a burned depression in it. The foreman had sneakily given the lad a left hand drill... :-) -- Best Regards: Baron. |
#38
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AA-sized conductor (fake battery) wanted
On 1/16/2011 11:59 AM, Baron wrote:
http://www.harborfreight.com/1000-lb-capacity-hydraulic-scissor-table-cart-93116.html Hey that looks nice ! Don't know what I would do with it ! But it looks nice. Great for moving (light) pool (billiard) tables, pinball machines, etc. Of course, the latter can be moved by a person with a suitably strong *back* |
#39
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AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/16/2011 11:59 AM, Baron wrote: http://www.harborfreight.com/1000-lb-capacity-hydraulic-scissor-table-cart-93116.html Hey that looks nice ! Don't know what I would do with it ! But it looks nice. Great for moving (light) pool (billiard) tables, pinball machines, etc. Of course, the latter can be moved by a person with a suitably strong *back* Well that rules me out then ! ;-) -- Best Regards: Baron. |
#40
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AA-sized conductor (fake battery) wanted
Baron wrote: Michael A. Terrell Inscribed thus: Baron wrote: D Yuniskis Inscribed thus: Yeah, when I hear complaints about all of my crap ^H^H^H er, *toys*, I think about *these* sorts of things! : The first friend (above) gave me a 3KW FERRUPS (UPS) one day. I was trying to figure out how to get it *into* the truck (weighed a couple hundred pounds... the batteries alone weighed more than 100 pounds). He "disappeared". And came back a few minutes later with a front-end loader, scooped the UPS into the bucket and dropped it onto the truck. Sheesh! Indeed. :-) In my case it would still be in the truck. You need one of these! http://www.harborfreight.com/1000-lb-capacity-hydraulic-scissor-table-cart-93116.html Hey that looks nice ! Don't know what I would do with it ! But it looks nice. Get heavy things from the bed of a pickup truck to your workbench. You should have seen the fun Ihad unloading a 60 Gallon air comressor from my truck last year. Two guys with a forklift loaded it, and slid it all the way forward. I had to use a chain hoist to inch it back to the tailgate, then lift it an inch above the bed before I pulled the truck out. Then I lowered it to the ground and 'walked' it into my shop. -- You can't fix stupid. You can't even put a band-aid on it, because it's Teflon coated. |
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