From: Terry Pinnell
Subject: Re: zero-power toggle circuit; was, how to master electronics
Date: Thu, 14 Nov 2002 08:55:09 +0000
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NNTP-Posting-Date: Thu, 14 Nov 2002 08:55:23 +0000 (UTC)
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"Bill Bowden" <**firstname.lastname@example.org*> wrote:
>Looks similar to a debounced MOSFET toggle switch I did
>last year and Win helped me fix it. But it's not zero power and
>uses a NPN and one less resistor. Came out to 470K and 220 ohms.
>The extra 10uF and 10K and diode ensures the thing powers up
>with the MOSFET off.
Thanks Bill, another nice one for my files. BTW, I see both that
circuit and the 'Single Transistor Relay Toggle Circuit' directly
below it sport 2-pole buttons; guess you must have some surplus stock?
As I've occasionally mentioned here, the garage light toggle circuit I
built three years ago based on your 'CMOS Toggle Flip Flop Using Push
Button' is still in daily use.
I improvised each of my momentary contact push buttons (at three
convenient locations) from a hinged 1" x 4" piece of wood, with a
couple of drawing pins (US = thumbtacks) as contacts, plus a small
spring from the junk box. So I can toggle the lights by a brief tap,
if necessary with a wrist or elbow when carrying stuff.
Hobbyist, West Sussex, UK