Drill Charger Timer

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Project by doncharles posted 01-22-2011 12:03 AM 13366 views 21 times favorited 28 comments Add to Favorites Watch
Drill Charger Timer
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I designed this device to time the operation of the 120V AC battery charger for my battery powered drill. I found out the hard way that the battery chargers for these batteries run HOT. If left plugged in all the time, they will burn out. These type chargers run $40.00 to $70.00. Yes, it is true that this charger will cost $30.00 to $40.00, But, it will not burn out. The timer is a spring wound timer. The timer is basically a switch that will stay on for the time set. This switch (timer) will carry an electrical load up to 1HP (745.6 Watts). I have never had a timer go bad, but if it did you can replace it for $20.00 or less. The battery charger for my 19V craftsman drill draws 65 watts.

If you send me your email address & you are a LJ & mention Timer I will email you, FREE, a PDF file that has easy to follow instructions to build this project.

NOTE: If you do not get your plans within one day, PLEASE send me another massage.

-- doncharles AKA Don

28 comments so far

View RonPeters's profile


713 posts in 3151 days

#1 posted 01-22-2011 12:57 AM

I use the same setup to run an IR heater element and another for my glue pot. 1 hour is plenty of time to heat either. If I forget to turn it off, no problem…

-- “Once more unto the breach, dear friends...” Henry V - Act III, Scene I

View woody57's profile


650 posts in 3698 days

#2 posted 01-22-2011 12:58 AM

that’s a great idea
why didn’t I think of that?

-- Emmett, from Georgia

View Mike Gager's profile

Mike Gager

665 posts in 3538 days

#3 posted 01-22-2011 01:23 AM

dang thats a good idea! im always forgetting to unplug my chargers!

View Brad_Nailor's profile


2543 posts in 4228 days

#4 posted 01-22-2011 01:25 AM

That is an ingenious idea to make battery charging safer. I have read quite a few articles about guys setting their houses on fire from battery chargers..especially these new Lithium Ion batteries. This is a great, mechanical, set it and forget it set up. Thanks for sharing.


View bigike's profile


4055 posts in 3559 days

#5 posted 01-22-2011 01:27 AM

wow nice setup. Can you blog about how you made this little devise? I think it would help alot of LJers including me.

-- Ike, Big Daddies Woodshop, http://[email protected]

View Page2171's profile


35 posts in 2955 days

#6 posted 01-22-2011 01:46 AM

That’s a great idea!. Not only does it make charging safer and extend the life of the charger, but it also saves energy.

-- Brian in Leesburg, GA

View Jeremy Greiner's profile

Jeremy Greiner

568 posts in 3042 days

#7 posted 01-22-2011 02:44 AM

Check the manual for your battery chargers .. some do this automatically. Although most do not.

-- Easy to use end grain cutting board designer:

View blackcherry's profile


3339 posts in 4093 days

#8 posted 01-22-2011 02:48 AM

This is so cool, and will probably give you a pm on the infor. thank for posting and sharing BC

View lightweightladylefty's profile


3285 posts in 3983 days

#9 posted 01-22-2011 04:44 AM


This looks like a great idea, but I’m just a little confused. Why can’t I just plug my rechargeables into the timer I use on my lights to automatically turn my charger off?


-- Jesus is the ONLY reason for ANY season.

View doncharles's profile


16 posts in 2954 days

#10 posted 01-22-2011 05:35 AM

The lamp timer may work fine, but be careful not to overload it

-- doncharles AKA Don

View NormG's profile


6415 posts in 3274 days

#11 posted 01-22-2011 07:23 AM

Wonderful solution

-- Norman - I never never make a mistake, I just change the design.

View tommyd's profile


77 posts in 3402 days

#12 posted 01-22-2011 09:13 AM

Nice Idea, but couldn’t you just plug you charger into an ordinary light timer and when you charge your battery set timer on for as long as you want it to charge?

-- Life is too short for negative drama & petty things. So laugh insanely, love truly and forgive quickly!

View Schwieb's profile


1879 posts in 3732 days

#13 posted 01-22-2011 02:54 PM

I have often wondered why someone hasn’t made a device like this or built it into the charger. Leaving them on all the time is just part of the phantom power consumption that goes on in our homes. All those little transformers for cell phones, cameras, printers, calculators, etc. etc.

-- Dr. Ken, Florida - Durch harte arbeit werden Träume wahr.

View Tim29's profile


307 posts in 3421 days

#14 posted 01-22-2011 03:15 PM

wow, that is a great idea!!!

-- Tim, Nevada MO

View stumpybear's profile


50 posts in 3126 days

#15 posted 01-22-2011 06:49 PM

Great Idea!!!

-- Stumpybear,Petersburg PA

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