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DIY ±18VDC to power a dead cordless drill Answered

Hi!
My last battery died on my cordless drill and i'm trying to transform it to a corded drill.

My plan was to use a microvawe transformer along with a bridge rectifier (KBPC5010  Bridge Rectifier Diode, KBPC Series, Single, 1 kV, 50 A, 1.2 V, Module, 4) to power the drill. 120VAC from the wall to, I wish, 12to18VDC.
The problem with this is the voltage given by the output of the microwave transformer is of only ±3VAC.

Any sugestion?

Discussions

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rudecam

4 years ago

I was also thinking about using smaller transformers and connect them in series to increase the voltage....

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killerjackalope

4 years ago

Charity shop, laptop charger, if you've modded a microwave transformer for a high amp output you'd need to make your secondary with six times as many windings to make your voltage, granted I think there'd be less effort and cost in going the laptop charger route.

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rudecamkillerjackalope

Reply 4 years ago

Hi Killerjackalope,
Laptop charger aren't putting out enough amps for the tools. Many seemed to have tried it.
I'm not familiar with modded microwave transformer. Tell me, is "MOD" stands for "modified"?
I've researched the web after reading your comment and I believe I have found something solid thank's to you.
https://www.youtube.com/watch?v=3eSXXnKOW5k

Granted It's impressive from a begginer's point of view.

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Downunder35m

4 years ago

Switchmode power supply is the way to go.
If you are lucky you might even find one that will fit into the battery case.