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12v auto pump from 110v?
Can a 12v windshield wiper pump be run from a wall wart? I am putting
together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd |
12v auto pump from 110v?
T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd I bought one for home experiments a few years ago, and from experience, they get pretty warm within a few seconds, and they're not meant for continuous use. I also think they don't like to be run dry, but running dry for a second or so shouldn't hurt it too badly. Make sure your wall-wart can provide the necessary current. Other than that, knock yourself out. ;-) Michael |
12v auto pump from 110v?
T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd If the wall wart has a rectified (DC) output and a reasonably close to 12 volt output and enough current capacity to run the motor, then it should work just fine. |
12v auto pump from 110v?
Anyone know the aperage of a automobile system?
In article , T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd |
12v auto pump from 110v?
T-n-T wrote:
Anyone know the aperage of a automobile system? Guessing about an amp or so. You can always run an experiment to find out... get a digital multimeter, set it to measure current, and connect it in SERIES with the windshield wiper motor, connected temporarily to your car battery (small alligator clips work great). Make sure the pump is sucking water, even if it's just cycling through a bucket, to get a reading for while the pump is under load (and so you won't run it try, ruining it). And don't get it wet, and don't let any wires touch the car metal ground... Guys, did I leave anything out..? Michael |
12v auto pump from 110v?
On 12/7/06 10:28 AM, in article ,
"T-n-T" wrote: Anyone know the aperage of a automobile system? In article , T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wrong question, You want to know how much current the pump motor draws at 12V, I suspect the current needed will be printed or etched on the pump motor. I also guess it could be several Amps. Don |
12v auto pump from 110v?
Don Bowey wrote: On 12/7/06 10:28 AM, in article , "T-n-T" wrote: Anyone know the aperage of a automobile system? In article , T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wrong question, You want to know how much current the pump motor draws at 12V, I suspect the current needed will be printed or etched on the pump motor. I also guess it could be several Amps. Don And don't forget the startup surge current, which can be several factors above steady-state current draw. I don't recall my pump motor specifying the current draw... FWIW, I ran mine from 4 D cells (6V), which was just fine with the low flowrates I was using. Michael |
12v auto pump from 110v?
On Thu, 07 Dec 2006 09:30:15 -0800, T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. If all you need is a mist for a terrarium, then a windshield washer motor is probably overkill - you don't need anywheres near that much of a flow rate. I'd check aquarium filter pumps, and that sort of thing. The fun part of the project is going to be finding nozzles, and getting them hooked up. :-) Or, you could go totally goofy, and get hand sprayers and arrange a little motor and cam to press the trigger a few times. ;-) Good Luck! Rich |
12v auto pump from 110v?
On Thu, 07 Dec 2006 10:28:52 -0800, T-n-T wrote:
Anyone know the aperage of a automobile system? The washer pump? Yes, several amps. More current than you'd realize, they are terribly inefficient. And noisy. There are several fuel pump designs that will work with water! (not the rotary ones, but there are designs that use a plunger with a solenoid driver). They may do a better job doing what you want. (Big may, not sure if they'd last an incredibly long time). |
12v auto pump from 110v?
"PeterD" wrote in message
... There are several fuel pump designs that will work with water! (not the rotary ones, but there are designs that use a plunger with a solenoid driver). What happens if you try to use water with the rotary ones? I once replaced a fuel pump on a Crown Victoria, sold the car and had the pump die again the day before I was supposed to deliver the car to the buyer. @#$@#%*( The deal fell through of course, and I got to replace the pump *again*. The second time around there was so little time left the car was sold to a dealer for next to nothing. @#@#$%! |
12v auto pump from 110v?
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12v auto pump from 110v?
PeterD wrote:
On Thu, 07 Dec 2006 10:28:52 -0800, T-n-T wrote: Anyone know the aperage of a automobile system? The washer pump? Yes, several amps. More current than you'd realize, they are terribly inefficient. And noisy. There are several fuel pump designs that will work with water! (not the rotary ones, but there are designs that use a plunger with a solenoid driver). They may do a better job doing what you want. (Big may, not sure if they'd last an incredibly long time). Wow, aren't fuel pumps kind of expensive? Kragen lists them starting at $100+. These pumps are looking better and better... http://www.harborfreight.com/cpi/cta...temnumber=1479 http://www.harborfreight.com/cpi/cta...temnumber=9576 I'm going to need a pump that can pump a conductive fluid (dissolved baking soda), and I'd *really* prefer *not* to have to use a submersible aquarium pump. 110VAC... submersible pump... conductive fluid... not a safe mix. Michael |
12v auto pump from 110v?
On Thu, 07 Dec 2006 09:30:15 -0800, T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Is it "tap" water (pressurized)? If so just use a mist nozzle from an outdoor "bubbler" irrigation system, and a solenoid valve body (nominally 28V, but AC, so all you need is a transformer). ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |
12v auto pump from 110v?
On 2006-12-07, T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. Bye. Jasen |
12v auto pump from 110v?
On 2006-12-07, Rich Grise wrote:
Or, you could go totally goofy, and get hand sprayers and arrange a little motor and cam to press the trigger a few times. ;-) I've seen central-locking actuators used for that. -- Bye. Jasen |
12v auto pump from 110v?
On Thu, 7 Dec 2006 15:00:10 -0800, "Joel Kolstad"
wrote: "PeterD" wrote in message .. . There are several fuel pump designs that will work with water! (not the rotary ones, but there are designs that use a plunger with a solenoid driver). What happens if you try to use water with the rotary ones? If it is all stainless, it might be OK. Some are, but they are expensive. A non-stainless (cheap ones) would rust quickly. The plunger/solenoid ones are mostly plastic. |
12v auto pump from 110v?
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12v auto pump from 110v?
On 8 Dec 2006 10:16:47 GMT, jasen wrote:
On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. Bye. Jasen Yep, that confirms what I said earlier, so I'd say your cheap DMM was doing OK! bg They are *really* inefficient! |
12v auto pump from 110v?
PeterD wrote:
On 8 Dec 2006 10:16:47 GMT, jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. Bye. Jasen Yep, that confirms what I said earlier, so I'd say your cheap DMM was doing OK! bg They are *really* inefficient! And they get hot, too. You'd think that the pump designer would at least use the pumped liquid to cool down the motor. Naah... |
12v auto pump from 110v?
jasen wrote:
On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
12v auto pump from 110v?
On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote:
jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) |
12v auto pump from 110v?
Rich Grise wrote:
On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) |
12v auto pump from 110v?
On 8 Dec 2006 14:43:59 -0800, wrote:
Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |
12v auto pump from 110v?
On Fri, 08 Dec 2006 15:56:14 -0700, Jim Thompson wrote:
On 8 Dec 2006 14:43:59 -0800, wrote: Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! I'm not ignoring it - I just liked mine better. ;-) (That would be an aquarium filter pump and hacked Windex nozzle(s), pretty much as you suggest, but less clunky. [and more fun to slap together. ;-) ]) Cheers! Rich |
12v auto pump from 110v?
Jim Thompson wrote: On 8 Dec 2006 14:43:59 -0800, wrote: Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! ...Jim Thompson It likely is, great idea, but it's not clear whether the OP minds stringing a garden hose from his backyard into his living room. Never mind the heating and cooling costs of leaving his backyard door open a crack, at all times... ;-) Michael |
12v auto pump from 110v?
On 8 Dec 2006 16:21:10 -0800, wrote:
Jim Thompson wrote: On 8 Dec 2006 14:43:59 -0800, wrote: Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! ...Jim Thompson It likely is, great idea, but it's not clear whether the OP minds stringing a garden hose from his backyard into his living room. Never mind the heating and cooling costs of leaving his backyard door open a crack, at all times... ;-) Michael He's carrying buckets of water to his terrarium? Surely he has a water pipe close by? Actually I carry water to my aquarium... R/O water, since it's a reef tank, and I have no way to get a feed to it... interior wall. But it only eats 3 2-gallon-buckets-worth per week (since I added the chiller ;-) ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |
12v auto pump from 110v?
Jim Thompson wrote: On 8 Dec 2006 16:21:10 -0800, wrote: Jim Thompson wrote: On 8 Dec 2006 14:43:59 -0800, wrote: Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! ...Jim Thompson It likely is, great idea, but it's not clear whether the OP minds stringing a garden hose from his backyard into his living room. Never mind the heating and cooling costs of leaving his backyard door open a crack, at all times... ;-) Michael He's carrying buckets of water to his terrarium? Surely he has a water pipe close by? Actually I carry water to my aquarium... R/O water, since it's a reef tank, and I have no way to get a feed to it... interior wall. But it only eats 3 2-gallon-buckets-worth per week (since I added the chiller ;-) ...Jim Thompson -- Um, you lose 6 gallons per week even in the fall / winter months? Slow leak? |
12v auto pump from 110v?
"T-n-T" wrote in message
... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wall warts ONLY handle currents up to about 1 Amp - MAX. That wiper motor is a current hog (more than a Wal Wart can handle!!) -- burn that up or blow internal fuse (if it has one) first time you try. gb |
12v auto pump from 110v?
On 8 Dec 2006 16:42:05 -0800, wrote:
Jim Thompson wrote: On 8 Dec 2006 16:21:10 -0800, wrote: Jim Thompson wrote: On 8 Dec 2006 14:43:59 -0800, wrote: Rich Grise wrote: On Fri, 08 Dec 2006 20:22:31 +0000, Michael A. Terrell wrote: jasen wrote: On 2006-12-07, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? Just the little squirter pump motor? I measured 2A continuous (more than I expected, but all auto electrics seems suprisingly inefficient) that'd be a large wall-wart or a small brick. or it could just be my cheap DMM playing up. So, which do you want? Super efficient, or something that will work when your life depends on it? Your life depends on misting your terrarium???!? =:-O Cheers! Rich [0] ;-) In that case, better get someone with medical experience... oh, Joerg! So, which does he want... efficient, reliable, or inEXPENSIVE? ;-) Why is everyone ignoring my yard-mister/valve-body/transformer approach? It's cheap-cheap-cheap and safe-safe-safe! ...Jim Thompson It likely is, great idea, but it's not clear whether the OP minds stringing a garden hose from his backyard into his living room. Never mind the heating and cooling costs of leaving his backyard door open a crack, at all times... ;-) Michael He's carrying buckets of water to his terrarium? Surely he has a water pipe close by? Actually I carry water to my aquarium... R/O water, since it's a reef tank, and I have no way to get a feed to it... interior wall. But it only eats 3 2-gallon-buckets-worth per week (since I added the chiller ;-) ...Jim Thompson -- Um, you lose 6 gallons per week even in the fall / winter months? Slow leak? Room temperature is ~75°F, humidity is essentially ZERO... this IS Arizona after all. Tanks is 250 gallons. Any other questions ?:-) Tank WAS rising to 84°F, due to the lighting, until I added a "chiller" ;-) ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food. |
12v auto pump from 110v?
Mcmaster has nozzels for misting etc.
Cheers "Rich Grise" wrote in message ... On Thu, 07 Dec 2006 09:30:15 -0800, T-n-T wrote: Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. If all you need is a mist for a terrarium, then a windshield washer motor is probably overkill - you don't need anywheres near that much of a flow rate. I'd check aquarium filter pumps, and that sort of thing. The fun part of the project is going to be finding nozzles, and getting them hooked up. :-) Or, you could go totally goofy, and get hand sprayers and arrange a little motor and cam to press the trigger a few times. ;-) Good Luck! Rich |
12v auto pump from 110v?
w9gb wrote:
"T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wall warts ONLY handle currents up to about 1 Amp - MAX. Um, not to give the op hope, but ... See cat# dctx 1215 from http://www.allelectronics.com/ for a 1.5 amp 12 volt wall wart and cat # 16760 from http://www.mpja.com/ for a 2 amp 12 volt wall wart. Ed That wiper motor is a current hog (more than a Wal Wart can handle!!) -- burn that up or blow internal fuse (if it has one) first time you try. gb |
12v auto pump from 110v?
T-n-T wrote:
Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd If you already have the wiper pump, you can use an interim solution to run it until you re-design. Use the wall wart to trickle charge some NiCds and run the auto wiper pump from that. The NiCds will provide the high current that the wiper pump needs, and the charger will replenish them between pump cycles. ----- Wall Wart +15V ---Vin|LM317|Vout---+ ----- | Adj [R1] | | +----------+--|--+------ to | pump [NiCd's] circuit | Gnd --------------------------------------+------ R1 = 1.25/(C/20) where C is the ampere hour rating of your cells. That should be more than enough to charge the cells between cycles. For example, say your cells are rated at 1000 mAh. At C/20, you would put in a total of 480 mAh in a day, and due to losses, the batteries would store 80% of that, or ~384 mAh. If you discharge for 1 minute 3 times a day at say 7 amps each time, you use 21 ampere minutes or 350 mAh hours. Have you figured out how to get a mist from that wiper pump? To me, that's a harder problem than figuring out how to provide power for the pump. Ed |
12v auto pump from 110v?
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12v auto pump from 110v?
"ehsjr" wrote in message
news:6dBeh.298$Et5.228@trndny07... w9gb wrote: "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wall warts ONLY handle currents up to about 1 Amp - MAX. Ed Um, not to give the op hope, but ... See cat# dctx 1215 from http://www.allelectronics.com/ for a 1.5 amp 12 volt wall wart and cat # 16760 from http://www.mpja.com/ for a 2 amp 12 volt wall wart. Yes, these are OLD surplus designs -- new mfg. are generally now avoiding (that is why they are on the surplus web sites/resellers). They usually do not stay in the duplex outlet without screw attachment to cover plate. Readily available 1 and 2 foot line cord jumpers --- help with this problem. These older designs stretched the definition of WallWart -- due to transformer's weight ! New ones are more "brick like" with short AC cord OR use standardized IEC jack. gb gb |
12v auto pump from 110v?
w9gb wrote:
"ehsjr" wrote in message news:6dBeh.298$Et5.228@trndny07... w9gb wrote: "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wall warts ONLY handle currents up to about 1 Amp - MAX. Ed Um, not to give the op hope, but ... See cat# dctx 1215 from http://www.allelectronics.com/ for a 1.5 amp 12 volt wall wart and cat # 16760 from http://www.mpja.com/ for a 2 amp 12 volt wall wart. Yes, these are OLD surplus designs -- new mfg. are generally now avoiding (that is why they are on the surplus web sites/resellers). They usually do not stay in the duplex outlet without screw attachment to cover plate. Readily available 1 and 2 foot line cord jumpers --- help with this problem. These older designs stretched the definition of WallWart -- due to transformer's weight ! New ones are more "brick like" with short AC cord OR use standardized IEC jack. gb gb The new stuff is nice. It seems like most everything new is going to switchers. I suspect one of the factors is the weight you mentioned. Take a look at the wall wart switchers like Mouser part #'s 418-TR25120-04 2.1Amps 418-TR30R120 2.5Amps 831-PW128RA1203B01 2.5Amps 552-PSA-15R-120-R 1.25Amps 552-PSA-21R-120-R 1.67Amps Allelectronics sells a switcher wall wart at 2.6 amps, cat # PS-1226 For non-switcher new wall warts 1 amp see Mouser part #'s 553-WDU12-1200 1.2Amps 553-WDU12-1900 1.9Amps A lot of choices 1 amp, but not necessarily suitable for the OP. I suspect not. I posted a different possibility for the OP. Ed |
12v auto pump from 110v?
On Sun, 10 Dec 2006 11:41:15 -0600, w9gb wrote:
"ehsjr" wrote in message news:6dBeh.298$Et5.228@trndny07... w9gb wrote: "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Wall warts ONLY handle currents up to about 1 Amp - MAX. Ed Um, not to give the op hope, but ... See cat# dctx 1215 from http://www.allelectronics.com/ for a 1.5 amp 12 volt wall wart and cat # 16760 from http://www.mpja.com/ for a 2 amp 12 volt wall wart. Yes, these are OLD surplus designs -- new mfg. are generally now avoiding (that is why they are on the surplus web sites/resellers). They usually do not stay in the duplex outlet without screw attachment to cover plate. Readily available 1 and 2 foot line cord jumpers --- help with this problem. These older designs stretched the definition of WallWart -- due to transformer's weight ! New ones are more "brick like" with short AC cord OR use standardized IEC jack. Back to the original problem. If you want to pump mist into a terrarium, how about a perfume atomizer driven by an aquarium air pump? Or, for real tech overkill, an ultrasonic nebulizer? |
12v auto pump from 110v?
Get a battery charger and plug it into the wall.
Connect the pump to the charger. "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd |
12v auto pump from 110v?
"Seymour Dupa" wrote in message
... Get a battery charger and plug it into the wall. Connect the pump to the charger. "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Todd Absolutely, it's possible. But the first thing you need to know is how much current the pump draws when it's pumping. Connect the pump to an auto battery and use your multimeter to measure the current. Buy a wall wart that puts out 12 - 14 volts DC. The current rating of the wall wart should be AT LEAST the current you measured being drawn by the pump. It's OK to go a bit higher than your measured current, but stay in the ballpark. IOW, if your pump draws 1 amp, get a wallwart with current rating of 1 amp to maybe 1.5 amps. If you get a regulated wallwart, the current rating doesn't matter as long as it's at least 1 amp (as in the example). -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Some days you're the dog, some days the hydrant. |
12v auto pump from 110v?
On Tue, 30 Jan 2007 20:14:48 -0500, Seymour Dupa wrote:
Get a battery charger and plug it into the wall. Connect the pump to the charger. "T-n-T" wrote in message ... Can a 12v windshield wiper pump be run from a wall wart? I am putting together a mist system for a terrarium, so it will run about 1 minute 2-3 times a day or so. If it will run from a wall wart any suggestions would be great. Or use an aquarium air pump to drive an old-fashioned perfume atomizer. |
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