Digital Volume Control

With this circuit you can make the amplifier volume control without having to use a potentiometer, but using a circuit with IC DS1669. For working voltage of the IC of this type was not 5 volts, but 4.5 VOLTS to 8 Volt, but used in this circuit at 5 V because it is more secure than the IC find that you are using exploded.

And the market is a lot of series this circuit of ICs such as:

• DS1669-10
• DS1669-50
• DS1669-100

Number after the hyphen that explains the resistance value of the IC, such as the DS1669-50 means that this ic 50K ohm resistance.

For the datasheet of this IC you can see below.

Pin Description IC DS1669

• RH - High Terminal of Potentiometer
• RW - Wiper Terminal of Potentiometer
• RL - Low Terminal of Potentiometer
• -V, +V - Voltage Inputs
• UC - Up Contact Input
• D - Digital Input
• DC - Down Contact Input

Standard resistance values IC DS1669

• DS1669-10 ~ 10 kΩ
• DS1669-50 ~ 50 kΩ
• DS1669-100 ~ 100 kΩ