Battery Saver

I was sick and tired of my kids leaving their battery power toys left on and draining the batteries. Especially the toy walkie-talkies which use a 9V battery that are more expensive to replace.

So I added a small circuit to disconnect the battery when it had not been used for some time. A push button is needed to turn it on and start the timer. The walkie-talkies already had one so I just stole this.

Battery Saver Circuit

For reference here is a typical schematic for a kids walkie-talkie.

Kids Walkie Talkie

Looking around on the net I found these other battery saver circuits
newenglandqrp.org/battery-saver

Battery Saver Example One

www.eeweb.com/blog/extreme_circuits/battery-saver-circuit-diagram

Battery Saver Example Two

 

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