Questions

[KA4HJH]

>The drum tone board was designed to be dropped into a project with a single
>ended supply, and uses +5 as a midpoint within the circuit.  You still need
>to add +12 or +15 to fully power it up.
>
>...but I've just flipped through my old manual, and don't see this mentioned
>anywhere!

Look at the PS requirements for the synthdrum circuit:

http://www.paia.com/syndrum.htm

You need +10~15V for that, which is probably the same basic circuit. 
Just hook the Vcc terminal to to a supply in that range you'll be all 
set.


>As for triggering, I was able to test mine with a little switch.  You might
>also be able to trigger it directly from a little Radio-Shack piezo
>transducer (about $3).

Might have to clamp that with some diodes or you could fry something 
if you whack it really hard. Didn't we have a discussion about this a 
while back? Please don't make me search for it!


>I also took a slow pulse train from a bench
>oscillator, and had a very simple drum machine!

MIDI/trigger would work nice, too.


-- 
Terry Bowman, KA4HJH
"The Mac Doctor"