Motorized Volume Control ALPS Grand Electronic Schematic
Electronic schematic diagram for a motorized volume control unit featuring dual relay circuits, optical isolator modules (OPT1 and OPT2 4N25), dual 2N2222A transistors, two DPDT relays, voltage regulation with 78L05 regulator, and ALPS 2x100K logarithmic potentiometer. Includes component values, pin connections, and PCB layout diagram.
