This time I made a great universal frequency treatment product that basically covers all popular frequency treatment functions. All functions can be achieved with just a cheap ESP32C3 module. At the same time, I abandoned the complex button design and used the mobile APP to operate all functions. It can not only facilitate secondary development for manufacturers, but also allow individual enthusiasts to do their own DIY. The following is a detailed introduction and parameters of the product, as well as pictures.
ESP32C3 pcb size:
ESP32C3-pro 49.4*22.1MM
ESP32C3-pro MINI 23.6*20.3MM
IO functions: I2C:IO5 and IO6 , connected to SSD1312 OLED
Outputs: IO7 and IO8, need to be combined with the H-bridge circuit to output bipolar square waves, because the brain tuner and Blood Electrification outputs are both bipolar square waves. The reference circuit diagram is as follows:
Pictures of various functional areas of mobile APP:
