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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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In Car Charger?
Hi
I have a B&Q 4:8v cordless screwdriver which is identical to this; http://www.tool-net.co.uk/p-326959/r...rewdriver.html It's really handy for jobs like kitchen units etc, but I don't use it much because I never know how much charge it has and I can't be arsed to carry the charger around & plug it in on site. Can I get an 'in car' charger for it? Presumably I could pop into Maplins & get the right plug and a charger giving out 4:8v? Is it as simple as that? -- Dave The Medway Handyman www.medwayhandyman.co.uk 01634 717930 07850 597257 |
#2
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In Car Charger?
Can I get an 'in car' charger for it? Presumably I could pop into Maplins
& get the right plug and a charger giving out 4:8v? Is it as simple as that? Just buy a mains inverter. Then you can run all the wall warts you like off it. Christian. |
#3
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In Car Charger?
"The Medway Handyman" wrote in message news Hi I have a B&Q 4:8v cordless screwdriver which is identical to this; http://www.tool-net.co.uk/p-326959/r...rewdriver.html It's really handy for jobs like kitchen units etc, but I don't use it much because I never know how much charge it has and I can't be arsed to carry the charger around & plug it in on site. Can I get an 'in car' charger for it? Presumably I could pop into Maplins & get the right plug and a charger giving out 4:8v? Is it as simple as that? Depends. The batteries in these beasts are really intended to be charged with a constant current, not a constant voltage. Of course, some just charge them constant voltage but this can be dangerous and shorten the battery life. What you need to know is if there is any circuitry in the charger (or possibly the screwdriver) that provides a constant current. Can you look in side and take a photo? If so, Email to me on at the address on my website. -- 73 Brian www.g8osn.org.uk (Also in Medway) |
#4
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In Car Charger?
Buy a 12V dc to 240V ac power inerter (small one fits your car
cigarrete lighter), and plug your home screwdriver charger into it. |
#5
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In Car Charger?
In article ,
The Medway Handyman wrote: I have a B&Q 4:8v cordless screwdriver which is identical to this; http://www.tool-net.co.uk/p-326959/r...rewdriver.html It's really handy for jobs like kitchen units etc, but I don't use it much because I never know how much charge it has and I can't be arsed to carry the charger around & plug it in on site. Can I get an 'in car' charger for it? Presumably I could pop into Maplins & get the right plug and a charger giving out 4:8v? Is it as simple as that? How does it normally charge - the pic doesn't show. Do you remove the battery and put into a charger? And has that charger got a separate wall wart? As it really depends where the actual charging electronics are. If, for example, it has a wall wart which outputs something like 9 volt DC unregulated a car supply will probably be ok. But if the charging circuit is in the wall wart it won't. -- *This message has been ROT-13 encrypted twice for extra security * Dave Plowman London SW To e-mail, change noise into sound. |
#6
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In Car Charger?
Dave Plowman (News) wrote:
How does it normally charge - the pic doesn't show. Do you remove the battery and put into a charger? And has that charger got a separate wall wart? As it really depends where the actual charging electronics are. You have a charger that plugs into the drill. I wish it had a removeable battery, I'd buy a spare & solve the problem. -- Dave The Medway Handyman www.medwayhandyman.co.uk 01634 717930 07850 597257 |
#7
Posted to uk.d-i-y
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In Car Charger?
wrote:
Buy a 12V dc to 240V ac power inerter (small one fits your car cigarrete lighter), and plug your home screwdriver charger into it. Sounds perfect. Where would I get one? Maplins? What else would an inverter cope with? Could I run power tools with a bigger one? -- Dave The Medway Handyman www.medwayhandyman.co.uk 01634 717930 07850 597257 |
#8
Posted to uk.d-i-y
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In Car Charger?
"The Medway Handyman" wrote in message k... Dave Plowman (News) wrote: How does it normally charge - the pic doesn't show. Do you remove the battery and put into a charger? And has that charger got a separate wall wart? As it really depends where the actual charging electronics are. You have a charger that plugs into the drill. I wish it had a removeable battery, I'd buy a spare & solve the problem. -- Dave The Medway Handyman www.medwayhandyman.co.uk 01634 717930 07850 597257 Dave, Splash out and buy this :- Bosch GSR10 cordless screwdriver. Good price from Screwfix and a fabulos tool with a fair bit of grunt. Screwfix part no is 61739. it will seem expensive at £79.99 + vat, but is it a very good piece of kit and all my electricains have been bought them. Regards Steve |
#9
Posted to uk.d-i-y
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In Car Charger?
In article ,
The Medway Handyman wrote: Buy a 12V dc to 240V ac power inerter (small one fits your car cigarrete lighter), and plug your home screwdriver charger into it. Sounds perfect. Where would I get one? Maplins? Shop around. TLC are reasonable. What else would an inverter cope with? Could I run power tools with a bigger one? You can, but don't expect the car battery to last long. 3 amps at 240 volts is 60 at 12. Ish. -- *If you try to fail, and succeed, which have you done? Dave Plowman London SW To e-mail, change noise into sound. |
#10
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In Car Charger?
Christian McArdle wrote:
Can I get an 'in car' charger for it? Presumably I could pop into Maplins & get the right plug and a charger giving out 4:8v? Is it as simple as that? Just buy a mains inverter. Then you can run all the wall warts you like off it. I chesked out http://www.cybermarket.co.uk/ishop/923/shopscr98.html They have Modified Sine Wave Inverters , Pure Sine Wave Inverters and Combined Inverter & Chargers - brain gone numb. No idea of which they speak. I checked out TLC and they have just plain inverters - but the cheapest is aroud £23. I'd only expect to pay a £5 -£10 for an in car charger for a phone or whatever. Is an inverter overkill? -- Dave The Medway Handyman www.medwayhandyman.co.uk 01634 717930 07850 597257 |
#11
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In Car Charger?
In article ,
The Medway Handyman wrote: I'd only expect to pay a £5 -£10 for an in car charger for a phone or whatever. Is an inverter overkill? It is, but unless a proper charger is available or you can make one it's likely to be the cheapest way. Might be cheaper still to buy a drill that can be charged off the car battery. -- *Always remember you're unique, just like everyone else. Dave Plowman London SW To e-mail, change noise into sound. |
#12
Posted to uk.d-i-y
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In Car Charger?
In message , "Dave Plowman (News)"
writes In article , The Medway Handyman wrote: Buy a 12V dc to 240V ac power inerter (small one fits your car cigarrete lighter), and plug your home screwdriver charger into it. Sounds perfect. Where would I get one? Maplins? Shop around. TLC are reasonable. Car Accessory shops and caravan/camping places sell them as well. Might be a better idea to stump up the extra for a new driver with 2 batteries? -- Chris French |
#13
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In Car Charger?
In article ,
chris French wrote: Might be a better idea to stump up the extra for a new driver with 2 batteries? And most drills like this have the charging electronics built in to the charging base, so look out for one that has a 12 volt wall wart - you could then substitute this with the car battery. -- *Verbs HAS to agree with their subjects * Dave Plowman London SW To e-mail, change noise into sound. |
#14
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In Car Charger?
On Fri, 25 Aug 2006 23:53:51 GMT, "The Medway Handyman"
wrote: I chesked out http://www.cybermarket.co.uk/ishop/923/shopscr98.html They have Modified Sine Wave Inverters , Pure Sine Wave Inverters and Combined Inverter & Chargers - brain gone numb. No idea of which they speak. I checked out TLC and they have just plain inverters - but the cheapest is aroud £23. I'd only expect to pay a £5 -£10 for an in car charger for a phone or whatever. Is an inverter overkill? Does the drill have a standard DC socket? If so why not make a lead. Just use a cigar lighter plug, DC power plug lead and a power resistor to drop the voltage and regulate the current. These drill usually have 1Ah batts, so a lead with a 3 ohm resistor will drop ~9v at 300mA, for a charge time of 3-4 hours. You need to find out the polarity of the mains charger plug, this can be done with a cheap DMM. Also a word of warning, get a 10W power resistor and superglue it to a plate of ali or small heatsink. Without this they get very very hot! With a cigar plug with screw terminals and a ceramic terminal block or two, you won't need to do any soldering. Add a 12v LED or small bulb across the resistor to remind you it's on charge. Don't leave it on charge for longer than needed, as the life of the batts will be shortened. If this is too much hassle just get a cheap one that takes rechargable AAs and use as a backup... cheers, Pete. |
#15
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In Car Charger?
On Sat, 26 Aug 2006 12:49:26 +0100, in uk.d-i-y Pete C
wrote: Does the drill have a standard DC socket? If so why not make a lead. Just use a cigar lighter plug, DC power plug lead and a power resistor to drop the voltage and regulate the current. These drill usually have 1Ah batts, so a lead with a 3 ohm resistor will drop ~9v at 300mA, for a charge time of 3-4 hours. You mean 30 ohm!!! 3 ohm will blow up either itself or the driver or both. Apart from that, there is no means to terminate the charge when the driver is charged up. This scheme will keep pushing 300 ma into the driver as long as connected, which won't do it any good. It's easy enough to design a simple charger using an IC and very few additional components, and I daresay a search for "battery charger circuit" will turn up loads. Here's one http://www.angelfire.com/electronic/hayles/charge1.html Phil |
#16
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In Car Charger?
On Mon, 28 Aug 2006 15:45:55 GMT, Phil Addison
wrote: On Sat, 26 Aug 2006 12:49:26 +0100, in uk.d-i-y Pete C wrote: Does the drill have a standard DC socket? If so why not make a lead. Just use a cigar lighter plug, DC power plug lead and a power resistor to drop the voltage and regulate the current. These drill usually have 1Ah batts, so a lead with a 3 ohm resistor will drop ~9v at 300mA, for a charge time of 3-4 hours. You mean 30 ohm!!! 3 ohm will blow up either itself or the driver or both. Oops, well spotted! Apart from that, there is no means to terminate the charge when the driver is charged up. This scheme will keep pushing 300 ma into the driver as long as connected, which won't do it any good. I daresay the mains charger works like that, the one for my driver does. cheers, Pete. |
#17
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In Car Charger?
On Fri, 25 Aug 2006 19:25:25 GMT, The Medway Handyman wrote:
Buy a 12V dc to 240V ac power inerter (small one fits your car cigarrete lighter), and plug your home screwdriver charger into it. And other low power mains things like other chargers. Very useful box to have. Sounds perfect. Where would I get one? Maplins? They do have them. I'd look for one with sine output. I have a 300W invertor in the car, one plugin 4 x AA battery charger will only charge one pair of batteries when on the invertor but is fine on real mains. The phone charger is fine. What else would an inverter cope with? Could I run power tools with a bigger one? Yes but as Mr Plowman says the DC side currents start to get hefty and you'll have to wire it direct to your car battery with thick cable. You also run the real risk of flattening that battery leading to a few problems like not being able to start your car a severly shortening the vehicle batteries life. If going this route fit a seperate "deep discharge" leisure battery and split charge system. Decent power output invertors aren't cheap either. -- Cheers Dave. pam is missing e-mail |
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