Re: on/off circuit



David Harmon wrote:

Eeyore wrote:

A monostable is what you need. Press the switch and it will stay on for X
minutes.

How would one design that in such a way that there would be zero
(or practically zero) battery draw after it shuts itself off?

A CMOS monostable itself draws negligible current. Use its output to drive a
mosfet powering up the circuit being switched. Or even use a relay if mosfets
are too complicated for the beginner.

Graham


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