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Yongnuo Flashes

Digital Volume Control

Digital Volume Control Circuit Diagram

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.

Parts:

C1 - 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.
4. Using a dual polarity power supply (+-5V works fine) will cure most clipping problems. You will have to check the data sheet for the correct pins to connect your voltage

source: www.aaroncake.net

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