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From: firstname.lastname@example.org (N. Thornton)
Subject: Re: Electronics Newbie Needs Help With A Timer Delay Circuit...
Date: 2 Oct 2002 01:21:27 -0700
NNTP-Posting-Date: 2 Oct 2002 08:21:27 GMT
email@example.com (Jake) wrote in message news:...
> Thanks for all the replies guys.
> I'm sorry for not clearly stating the in's and out's of what I was
> thinking. (it was late...blahblahblah..)
> Anyways, There will be a podium with many buttons.
> Only one button will actually be part of circuit, the rest will just
> be decoration.
> When the patron presses the pushbutton I want it to start a 10 second
> delay circuit that after the 10 second period turns on light. The
> light doesnt neccesarily have to be an AC powered bulb, and I agree
> that this would be to much of a saftey issue if nothing else. After a
> certain amount of time (25 seconds?) I want the light to go out and
> the circuit to reset itself ready for the next person to press it. The
> switch needs to be momentary action or else it would require the
> viewer to reset the switch each time. Wouldn't it?
> At this point I am totally open to any changes that would make it
> easier to construct, run, or maintain. And certainly make is safer as
> well. Hopefully this explains what I'm thinking, but if not just ask.
> Thanks again as I appreciate the knowledge and advice
It might be easier to do using a little geared motor and 2
microswitches. Press button starts the motor going, motor disc
promptly closes a parallel motor-powering microswitch so that motor
remains running when button released. 2nd microswitch does what you
want with the lamp. Its one option for you. I woud think with your
lack of tronic knowledge you'd get this made far quicker.
A bimetal thingy is another option. Or if its for an exhibition,
having a human do it.
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