7-Bands Analyzer ESP-C3

Simple, entry level SMD project that requires a hot plate and a steady hand. This 7 Band Audio Spectrum Analyser will use the MSGEQ7's internal clock which keeps the circuit simple and affordable. Each of the 7 band column uses 20 LEDs for a total of 120 pixels. The controller used for this project is a cheap 16-pin ESP32-C3 SuperMini from Waveshare. Also built in is a PAM8403 2x3 watts audio amplifier and a Bluetooth module MH-M18 for aditional audio input using a smart phone or Laptop PC. It can also be used as a portable speakers with 2 x 18650 batteries lasting 2.5 hours with a single charge.