One displays hours, the other, minutes. The analog meters are simply driven by the PWM outputs of the Arduino. It’s not a hugely complex project, but it teaches so much.

The Arduino then measures the voltage on those inputs and feeds the necessary commands to the PT6314 driver to update the display. The resulting VU meter has 38 bars per channel, and is highly ...

Arduino Audio Meter Specifications: – Based on Arduino UNO board for signal processing (16MHz, 1KB RAM). – Analog input/output stages using MCP6002 rail to rail op-amp. – The original audio ...