This old 4-channel circuit was found in the December 1994 Electronics Now magazine. The circuit uses a 556 as a modulator. Note the code programming key.
In the circuit shown in the figure we have the way to excite a small speaker from a TTL output. The...
This fuzz uses only one transistor that can be the BC548. Signal input and output cables must be...
This circuit is from a 1977 documentation. It is powered by the power supply of the circuit under...