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.
In the figure we have the way to control a triac of the TIC series with a low voltage through a...
This circuit generates a linear triangular signal whose frequency is determined by C1. Transistors...
This circuit was obtained in a 1989 English magazine. Despite using a fixed 5 V regulator, it can...