This dynamic mixer allows for smooth adjustment of the signal's passage from one channel to another. We found it in an American documentation from the 70s.
This circuit uses three inverters to generate a rectangular signal whose frequency depends on R1...
This control circuit or reversible contactor was found in a 1967 General Electric manual. The...
This circuit counts from 1 to 10 or 0 to 9 using as indicators common LEDs. The circuit can be...