Giles,

 Don't you mean 'croaking' frog?   :')
 Either way, I haven't seen any.

                      Regards,

                         Jim


On Mon, 20 August 2001, Giles Honeycutt wrote:

>
> OK, their is a 100 ways to do this, but I don't want to re-invent the wheel.
>   Are their any reference designs for something like the crocking frog that
> makes noise when someone walks in front of it?  Are they using a
> photo-resistor and sensing change with a low pass filter?  Are they using a
> photo diode? Photo Transistor?  If so, how do they avoid total saturation?
>
> Best regards,
> Giles
>
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