It is currently 29 Mar 2024, 14:37
Mike G wrote:The drill trigger will, I think, be separated from the machine and used in a two-way switching arrangement with a switch on the outside of the cabinet. The machine's original switch would simply be used to switch it off at the end of each run, be that up or down, so it should never go from up to down whilst in the middle of a run. The change of direction function would be similarly organised with a mechanical device controlling it, again, only at the end of a run. I think.
timothyedoran wrote:I might be i bit late to the party. When I lived on a canal boat I knew of people running 12v power tools directly from 12v car/leisure batteries.
I built my off grid timber house using an old Makita hooked up to old 12v battery.Mike G wrote:Yeah, I ran a cordless from my car battery when camping in Africa.
It's already DC, so you're halfway home before you start. And most 12V car batteries are delivering 14 or 15V anyway before the voltage regulator sorts it out.
Mike G wrote:Yeah, I ran a cordless from my car battery when camping in Africa.
AJB Temple wrote:Mike G wrote:Yeah, I ran a cordless from my car battery when camping in Africa.
OK, I have to ask. Who needs a cordless drill when in Africa camping? Urgent bit of bookcase building?
Lons wrote:AJB Temple wrote:Mike G wrote:Yeah, I ran a cordless from my car battery when camping in Africa.
OK, I have to ask. Who needs a cordless drill when in Africa camping? Urgent bit of bookcase building?
I'd have though that was obvious, when being attacked by lions fend them off with a cordless drill.
Mike G wrote:Presumably there is a transformer and a rectifier inside the battery charger for any drill. Could I not just run a cable from the battery charger terminals to the terminals in the drill?
That would still need a capacitor to smooth the rectified AC output and it must not be just a trickle charger, they would not supply enough current.Mike G wrote:How about a car battery charger? That outputs DC at a suitable voltage for a car battery (presumably 12 to 15V).
Mike G wrote:Presumably there is a transformer and a rectifier inside the battery charger for any drill. Could I not just run a cable from the battery charger terminals to the terminals in the drill?
sunnybob wrote:Buy the kit Mike, or youll burn your house down.
https://www.hiddentvlift.co.uk/our-prod ... pathway-13
I bet youll spend that on the home made pieces.
stevegruk wrote:Mike
This is probably miles too late but....
Yes you can but as others have said you need a rectifier and a big smoothing cap. The sizing of all of this depends on your load which determines how much electrical power you need.
A safer an easier way is to buy a nice safe enclosed switched mode power supply such as one of these, but again you need to select one with enough power:-
https://uk.farnell.com/w/c/power-line-p ... rt=P_PRICE
Although you could, I’d not use the drill own switch or mechanical direction control just use a double pole changeover relay and wire direct to the motor in the drill. I’d use a micro switch to control the direction relay.
Hope that helps.
sunnybob wrote:Buy the kit Mike, or youll burn your house down.
https://www.hiddentvlift.co.uk/our-prod ... pathway-13
I bet youll spend that on the home made pieces.
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