Russell McMahon wrote:
> Olin.
> You can use a PIC10F... and not much else.
> Basically a battery and beeper and any processor will do it.
>
> Extra points is given for the version with a light sensor that only
> sounds in the dark. Turn on the light and it stops. Make it sound like
> a cricket and ...

I don't know why you are addressing this to me.  It does sound like a fun
exercise but I've already got lots of things to do.  If I were to do this
I'd make it run from a single AA battery.  You're right, after the power
supply all you need is a 10F204, a piezo speaker, and a CdS light sensor.  I
wouldn't want the sound to be a simple beep.  You could probably synthesize
a cricket-like sound in a software loop.

My HAL project (http://www.embedinc.com/pic/hal.htm) has some of these
features although the output sound is much more elaborate.  It only runs
when it's dark, and shuts down if you shine a flashlight at it.


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