Digital Volume Control

This digital volume control has no pot to wear out and introduces almost no noise in the circuit. Instead, the volume is controlled by pressing UP and DOWN buttons. This simple circuit would be a great touch to any home audio project.

Schematic Schematic for amp

Parts:

C3_________0.1uf Ceramic Disc Capacitor
U1_________DS1669 Digital Pot IC (See Notes)
S1,S2_______Momentary Push Button Switch
MISC_______Board, Wire, Socket For U1

Notes:

1. U1 is available from Dallas Semiconductor.

2. S1 turns the volume up, S2 turns it down.

3. The input signal should not fall below -0.2 volts.