"Lew Hodgett" wrote in message
eb.com...

The major drawbacks to the Harbor Freight cordless drill is the
recharge time (3-5 hours) and there is no indication that the
battery is finished recharging.

Below is an automatic shut off circuit using standard shelf
componets.

Enjoy.

Lew
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Go one better. Add a manual 7 day timer, plugged into the 24 hour timer.
If you set it so it starts a one day 6 hour cycle when you start the charge,
the same thing happens. It charges and shuts off, but since it will only
run the 7 day timer for 5 hours per day and then stop, it will take about a
month before the charger (plugged into the output strip of the 7 day timer)
to start. No need to switch it over. Letting it charge once per month or
so will keep it full.

Old rc'er trick.
1, 6 circuit switched power outlet strip.
1, Manual 24 hour timer with two switched outlets.
2, LED night lights.

Directions:

Program the timer to be "ON" for 5 hours and
"OFF" for 19 hours.

I used "ON" at 00:00 (midnight) and "OFF" at 5:00 AM.

Plug timer into power outlet strip.

Plug an LED night light into power outlet strip.

Plug an LED night light into 24 hour timer outlet.

Plug the 24 VDC "WallWart" from the Harbor Freight
recharger module into a 24 hour timer outlet.

Plug 24 VDC plug from the "WallWart" into the
Harbor Freight recharger module and insert battery
to be recharged.

Plug power outlet strip into a source of power.

Rotate timer cam until it just touches the "ON" cam.

Turn the power outlet strip "ON".

The LED night light plugged into power outlet strip
should turn "ON".

When the cam turns "ON", the LED night light
plugged into a timer outlet will turn "ON" and the
RED and GREEN lights on the battery charger
will turn "ON".

After 5 hours, the timer will turn "OFF", the
LED night light plugged into timer outlet will
turn "OFF" and the RED and GREEN lights on
the battery charger will turn "OFF".

At this point, turn the power outlet strip "OFF".

The LED night light plugged into power outlet strip
should turn "OFF".

Remove the battery and allow to cool.

NOTES:

The timer only allows the recharger to be on for
5 hours and then turns "OFF" for 19 hours.

It will recycle if you haven't if you haven't turned
off the power during that 19 hour period.







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