This bidirectional motor control was found in an 80's Electronic Engineering. The circuit uses a component of the time and is suitable for motors up to 1 A.
This circuit consists of a voltage regulator for 6 V batteries with a very low voltage drop. The...
This BFO or OFB for listening to SSB (Single Sideband) signals was found in the January 1996 issue...
We found this circuit in a European publication from the 1990s. Transistors are still common types...