Found in an 1989 R-E Experimenters Handbook, this circuit produces several sound effects that can be modified. The signal must be applied to an external amplifier.
This circuit produces signals in the range of 200 Hz to 2 kHz. We found it in the magazine...
Found in the December 1974 issue of Radio Electronics, this circuit is similar to the previous one,...
This circuit can provide both positive and negative voltage outputs from 2 to 12 V with current up to...