Battery Saver by Pushbutton Version
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The Battery Saver is designed to prolong the battery life in small toys and devices by
disconnecting the load after a preset period. The two versions shown switch up to
one amp and give about one minute of operation before shutting off.
When the switch is pressed, the capacitor charges and the full battery voltage is applied
to the load. The capacitor slowly discharges and the circuit turns off when the voltage
reaches about 1volt.
Read more original source:
http://www.techlib.com/files/batsave.pdf
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