And you get a clock at the end of it! [hamblin.joe] wanted to do a simple project for kids along these lines, so whipped up a neat design using analog meters to display the time.

The build uses an Arduino Nano as the brains of the operation, which uses its analog inputs to process incoming audio into decibel levels for display on a VU meter.

Ingeniously harnessing the power of the Arduino Nano ESP32 to create a compact, handheld gaming console that boasts full-color graphics on a round display.

The algorithm in this microcontroller design drives an LED matrix and provides digital-voltage-readout and bar-like dot displays, showing dots for a graphical output if the input value is changing ...