This circuit was found in Motorola's 1968 documentation. It can be built on current equivalent components. The bridge diodes and the SCR must be in accordance with the current of the controlled motor.
This simple circuit for motors that depends on the MOSFET used was found in the January 1998...
This transistorized shield also functions as a logic gate. The power supply can be in the range of 4.5...
Found in a 90s Popular Electronics, this Hartley oscillator uses an output transformer of the type...