The diagram shows a tone control with the LM381 IC. The circuit is from a Radio Electronics from February 1990. The power supply is single.
The two power steps below are intended for use with the SAA1027 stepper motor control but can be...
This circuit was found in a Texas Instruments’ publication. The circuit must be powered from dual...
This automatic battery charger was found in a Popular Electronics from the 90s. The circuit uses a...