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Subject: Re: zero-power toggle circuit; was, how to master electronics
Date: Sat, 16 Nov 2002 13:46:21 GMT
NNTP-Posting-Date: Sat, 16 Nov 2002 08:46:21 EST
Organization: Road Runner
Terry Pinnell wrote:
> John Devereux wrote:
>>>Win, Jonathan: I'm struggling to understand why I can't get it to
>>>simulate. I don't have a BSS110, but tried several alternatives for
>>You are using a *P-Channel* device for Q2, yes?
> Yep. Currently IRF9540.
>>>Can you positively confirm the circuit's OK please?
>>Looks OK to me (but I haven't tried to simulate it).
>>>I downloaded the BS110 Fairchild data sheet
>>>which says "They can be used, with a minimum of effort, in most
>>>applications requiring up to 0.17A DC". I thought we were talking
>>Yes. In fact I believe Win pointed out that you could use a
>>This is a neat little circuit.
> John, Win, Frank: Thanks for confirmation. I'm darned if I can get it
> simulated. Won't toggle off on second 200 mS push of N/O button, 0.5 S
> after the first. I'm pretty sure I've made no stupid slips with my
> schematic. And I'm using the same button-simulator section that I used
> for Win's earlier circuit, which simulated fine. I suspect CM's models
> - although I've rung the changes with no joy.
> It would be interesting to see somone simulate it with another Spice
> Terry Pinnell
> Hobbyist, West Sussex, UK
I built the thing in REAL LIFE, and it works quite well :) What voltage
are you using? The circuit is set up for about 9V.