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.
With this shield circuit, you can control LEDs from an AND gate or microcontroller. When both...
Found in July 1975, Radio Electronics magazine this circuit can use any operating circuit,...
Found in Popular Electronics from the 90's, this circuit consists of an audio oscillator for Morse...