[sdiy] Drum Tone Board

[Ken Stone]

Have you adjusted the resonance pot? These things won't make a sound until
they are set up correctly. The resonance pot needs to be adjusted until the
thing self-oscillates, then backed off again. Also, if you are driving this
from your own pulse source, add a 110k resistor from the input side of the
capacitor to ground to stop it charging and staying charged, thys blocking
further pulses. This is a very common circuit, and I have used it
successfully on many occasions. The V8 simulator on my web page uses a pair
of them.

Ken

>Hello
>Iam building the Bass section in Paia Drum Tone Board.
>But i can´t get it to work. I have spent to many hours whitout getting
´nowhere. So now iam searching for help
>The signal dies after the first resistor. And i don´t know why. I have the
5+V to ground, becuase i use bipolar supply( as described in text ) Anyone
knows why?
>Please see the schematic at my website. The signal (5+) is the red line.
>http://www.sjobo.nu/philip/sas/bass.jpg
>_______________________
>Philip "Olsson" Olsson
>Mail: olsson at lajnux.nu
>Hompage: www.sjobo.nu/philip
>
>
_______________________________________________________________________
Ken Stone   sasami at blaze.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
Catgirl Paradise <http://www.anime.net/~kens/>