This radio for the AM band has the traditional superheterodyne configuration with several transistors and integrated audio amplifier circuit. The circuit is from the 70s.
In the figure we have two possible configurations for multivibrators with relay. The idea comes...
The A3906 integrated circuit from Allegro MicroSystems (www.allegro.com) consists of a single-step motor...
This circuit is from Japanese documentation from the 1960s. The coil data is provided in Japanese and...