Re: Turn off delay circuit


"vic"
Phil Allison wrote:
"vic"
I'd like to design a circuit such that it is powered on by a short press
of a switch, performs some action, and then turns itself off when it has
done its purpose.

I suppose I could do this using a FET, but it has surely been done
millions of times and I'd like not to reinvent the wheel. Could you give
me a suitable example of such a circuit, or resources to inform me on
the subject ?


** Google " NE555" .

Gets about half a million hits.


Thanks for your precious advice.
I was not clear enough.


** YOU are bout as clear as mud - fuckhead.

And that situation is certainly congenital.


Let me explain again : at first, the circuit is completely powered off.
The user pushes a button, which injects power into the circuit. Then a
mechanism maintains the power active, even if the switch has been
released. At a later undetermined moment, when the circuit does no longer
need power, it cuts its own power and sleeps until the user chooses to
push the button again. I'm pretty sure a 555 can't do this.


** *** knows WHAT THE HELL you are blathering about.

Whatever it is - you are way off topic here.

This NG is only about BASIC electronic concepts, hardware and practices.

Try " alt electronic.gadgets-wankers " instead.




...... Phil



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