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ESP32 is a tiny cheap 8$ module with a dual core 32-bit CPU and built in Wi-Fi and dual-mode Bluetooth with sufficient amount of 30 I/O pins for all basic electronics projects. All these features are ...

The build relies on a very simple circuit that relies entirely on analog ... The result is an attractive rainbow VU meter display that would look great as a part of any old-school stereo setup.

It’s a volume units meter for his sound system ... It has an integrated amplifier circuit which makes it the perfect part for building a VU display. He had a broken Linksys 5-port switch sitting ...