This small audio amplifier uses an uncommon integrated circuit today. The circuit is from a documentation from the 70s and is indicated for portable receivers of the time.
This zero-crossing detector circuit produces an output pulse every time the input sinusoidal...
This circuit was obtained in a 1976 publication, but it can still be assembled, as all components are...
This circuit was found in a publication from the 90s. The circuit can be assembled with modern...