For experiments with a disk rotating at various speeds, the April 1998 Electronics Now magazine suggests this PWM motor control. The current with the LM317 is 1.5A maximum.
This circuit is from a Japanese magazine of 1973. The circuit is designed to withdraw the power...
This circuit generates a signal rich in harmonics that extends up to close to 1 GHz, serving for...
This circuit is from an old publication, from 1992, being indicated to test the old joysticks of...