Hardware - pietwauters/esp32-scoring-device GitHub Wiki

The device is built around an ESP32 development module. There are many modules readily available. When ordering, make sure you have a dual core version. Most of these device have a USB connector that can be used to program the device and supply power to the module. Here you can find KiCad schematics and pcb files using a 30 pins esp32 development board. On this page you can find the conceptual schematics in case you want to build a prototype of your own e.g. using an experimentation breadboard. On this page are pictures of my first experiments.

List of components:

• ESP32 Development kit.
• 2x 470uF Elco
• 2x 100nF Cap
• 5x 470 Ohm resistor
• 2x 33 Ohm resistor
• Piezo buzzer
• 2x WS2812B-64 led matrix
• MAX7219 Dot matrix Module 4-in-1 LED Display module (Optional)
• 7x banana female connectors
• 1 experimentation pcb (typical 10x5 cm)
• wire
• A container (e.g. a lunch box)
• Nuts and bolts or similar to fix modules into the container.
• A USB cable + power adapter (at least 5V-1A, 2A preferred)

Schematics:

Real working example:

On the image below you can see how I fitted everything on a small 5x7 cm experimentation board. The 470 Ohm resistors are hidden below the ESP32 Development module.

I used Arduino for the software development. You will need to install the ESP32 board support.