12v twilight-activated, timed light switch?

I wouldn't worry about the latter figure; they won't last that long.

Sounds like a suitable project for a PIC, give me more details and I will see about programming a 12F or similar.

Hi James, Thanks you for the sugestion. I've decided that what would work best for my application would be a clap switch (one that is activated by the sound of a hand-clap or two hand-claps). I would like the light to stay of for a while after the hand-clap (I'd like the duration to be able to adjustjustable, via a potentiometer - from 10 minutes to 10 hours would be ideal). The switch would ideally be powerd by 12v dc: same as the light. The power source is a 12v gel cell battery. There are clap-switch kits around (for about £10) but not with the timer feature, as far as I know.

There is a timer circuit on this page (designed for use with a PIR switch) (the last circuit on the page):

I'm afraid my understanding of circuits is rather feeble. I have built circuits from kits, but understanding how they work, when they involve transistors or ICs is beyond me at present. I'm working on it though!

He's a c/d for a simple clap switch:

In message , JakeD writes

Buddhist version ?

Hare Krishna version

I have one somewhere (that I designed for a stage magician) if I can find it

Have a look at

Hi,

Might be a Velleman kit which does what you want (google).

cheers, Pete.

clap-switch I described using one of these kits?

Thanks,

JD

They do a clap switch but not one with a timer, as far as I can tell.

Thanks,

JD

You would have to build the clap switch as described in your links as the trigger, then yes you could use the board to turn the lights on and off after a determined delay or do anything else you liked. Alternatively you could take a look at

That sounds worth trying! Thanks again for your help.

JD

How is the project going, and do you have a real email address?