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/diy/ - Do It Yourself

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>> No.1215544 [View]
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1215544

>>1215523
>how little current I can get it to draw
I(load) divided by the beta of the transistor.
>Would I need to use a different Zener instead because of the voltage dropout
Voltage drop, and yes. Your circuit would "switch" off below 3.95V due to V(be) of the transistor.
>will the following work
Looks kinda dodgy to me fampai. I put scare quotes around switch because it doesn't have the snap action you'd probably want. Lithium battery protection is so commoditized today that you can buy the assembled, covers-all-bases solution from China for less than you can build a one-off that just handles overdischarge.

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