LA6NCA

ARDUINO AUDIO PAGE


AUDIO PREAMPLIFIER

Preamplifier with IR control. The amplifier is controlled by an Arduino Nano. Volume is controlled by a potentiometer with motor. Inputs are selected with relays.



The design is very simple. Relays select input. A potentiometer regulates the volume.
A - IR receiver for the remote control.
B - Arduino Nano
C - Motor with gearbox for volume adjustment.
D - Relay for power switch for the output amplifier.
E - Motor driver 74HC14
F - Input Relay 1 to 3.
G - Audio output connector.
H - Volume Potentiometer.
J - NE5532 audio opamp.
K - Power 5V regulator.









ARDUINO CODE

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