Audio Test Amplifier (CB21044E)

This circuit was found in an old Electronics Now. The integrated circuit can be of another type with the necessary circuit alterations.

| Clique na imagem para ampliar |

Germanium Transistor Voltage Regulator (CB987E)
This circuit, found in an old magazine of the year 1968, uses a Power germanium transistor. This...
Oven control (CB7962E)
This sequential circuit with an optical coupler was found in a Popular Electronics from the 90s to...
Fuzz effect (CB17975E)
This guitar effect circuit was found in a 2002 documentation. The circuit can be powered by a 9 V...