This car audio amplifier was found in a Popular Electronics Hobbyist Handbook from the 1990s. The circuit uses the TDA2004 to boost the car radio output of cars of the time.
This simple version of a function generator with the XR2206 was found in the May 1977 issue of...
In a modern version this circuit can use an LED in series with a resistor in place of the lamp. The...
This VFO was found in a 1980s documentation. The central frequency is given by the crystal and the...