This circuit is from an old American documentation. The circuit generates 20 to 200 ms steps for stepper motors.
This circuit was obtained in a 1975 magazine and can be implemented with BC548 transistors. The...
This circuit was found in a 1994 Electronics Now. The circuit uses an old analog TV flyback and...
Using the On Semiconductor NCS2200 voltage comparator this 2019 circuit was obtained from the...