Car interior light battery saver

234

02:42:07

A car interior light can drain the battery when accidentally left on - even if a LED lamp is used (here represented by the 100 Ohm resistor and the LED).
This circuit shuts the current off after about 8 minutes, with only 2.5 mA left. 
Turning the switch off again resets the circuit wthin 3-4 seconds, unloading the capacitor through the two diodes and the 4.7k Ohm resistor.
For the 2 transistors a BC516 darlington may be used.

published 4 years ago

wyoelk

4 years ago

A bit simpler circuit _ _ https://everycircuit.com/circuit/5113605744492544

eoh

4 years ago

That "simpler circuit" never goes off as long as the switch is on.

tamikafowlers

1 year ago

I love it!!!

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