One other thing - if the click is super short in duration, you'd need to
stretch the input pulse, which would make it more complicated...
Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@... > -----Original Message-----
> From: Dave Bradley [mailto:daveb@...]
> Sent: Monday, April 17, 2000 10:13 AM
> To: motm@egroups.com
> Subject: RE: [motm] OT: newbie needs a clue w/ circuit design....
>
>
> I whipped this up real fast, it should work if your input click
> audio is a volt or more. If not you may need additional
> amplification on the input. A comparator turns the audio into a
> pulse, which turns on the transistor to power the led. Needs 5V
> to power the circuit, you could probably get away with a wall
> wart transformer and a cheapo 7815 3 terminal regulator for the
> power supply. I'm afraid a battery wouldn't last for the entire gig.
>
> Moe
>
> > I need to make a circuit that will take an audio click and give me a
> > flashing led∗. I imagine that it's some kind of amplifier but
> beyond that
> > I'm lost. Hopefully this will be fairly simple.
> >
> > Considering how much everyone loves LED's on this list I
> figured that this
> > would be a good place to start.
> >
> > peace,
> >
> > John W
> >
> > ∗preferably something that will fit into a small project box and run on
> > battery power
> >
>