[sdiy] 76477 noise generator

[epeasant at telusplanet.net]

Hello everyone,

In spite of all the confusion lately I have somehow managed 
to do something constructive with this chip. See: 
http://www.angelfire.com/electronic/epeasant/circuits/76477.
gif for a schematic of a gated noise generator. This 
circuit is meant to be used in a percussion synth to create 
the "snares" sound of a snare drum. I have added a basic 
manual trigger circuit and standard speaker driver for 
stand-alone use.

I tried to keep the parts count to a minimum here, with no 
extra chips needed. With the VCO switch in the "off" 
position the output consists of the standard 76477 noise 
signal; with the switch "on" the output is the VCO 
controlled by the noise generator. The LFO can also be 
switched on to modulate the output at any time. This 
circuit can generate quite a wide range of sounds, some 
very, very, gritty :)

As usual, comments welcome!

Take care,
Doug
______________________
The Electronic Peasant

www.electronicpeasant.com