arpeggiator

[Toby Paddock]

>On October 06, 1997 3:03 AM, paul perry wrote:
>.....now for the experimentally minded why not a trigger that is derived from
>a photodiode that can be attached onto any front panel diode?
>
>One thing you could do then is to trigger a warning siren <snip>


In a pinch, you can cut the top off a metal can transistor and make it 
 a phototransistor.  I remember doing this once to trigger an alarm
 from a panel light on a thermal chamber.  Seems like a 9V battery,
 a Sonalert and bare twisted wires was the rest of it.

Hoping this finds you,
Toby