MultiPicoBox V2

A simple PCB with a Raspberry Pi Pico and some buttons, LEDs for gaming.

This new version have :

• 1 GPIO expander with a MCP23017 chip (I2C communication with the Pico, with configurable jumpers address)
• 4 rotary encoders with a push button
• 4 push buttons, 1 temporary position (0/1)
• 4 push buttons, 1 fix position (0-1)
• 4 toggle switches, 3 fixes positions (1-0-2)
• 6 LEDs for warnings/alerts

This Raspberry Pi Pico use CircuitPython version 9.x with external libraries :

• Adafruit module CircuitPython_MCP230xx

• JoystickXL module CircuitPython_JoystickXL

Printed Circuit Board (PCB) :

The schematic and PCB are made with KiCad version 8 (kicad folder).

First V2 prototype (8 x 8 cm only) from AISLER manufacturer :

Some useful plugins for KiCad :

• AISLER Push for KiCad : https://github.com/aislerhq
• Interactive HTML BOM : https://github.com/openscopeproject/InteractiveHtmlBom
• Board2Pdf : https://gitlab.com/dennevi/Board2Pdf
• Solarized Dark Theme : https://github.com/pointhi/kicad-color-schemes

Many thanks to @Kochise for his help and tips for the PCB 🍻

3D Enclosure :

The first enclosure prototype is made with FreeCad version 1.0.x. Work is progress !

Code :

• MultiPicoBoxV2_PCB_test is for testing the PCB with all external components

• MultiPicoBoxV2_JoystickXL_test is for testing everything like a gamepad 🕹️

Look at the code folder for more details.

Documentation :

Bus I2C :

• https://www.i2c-bus.org
• https://learn.adafruit.com/working-with-i2c-devices?view=all 👌
• https://learn.adafruit.com/circuitpython-basics-i2c-and-spi?view=all
• https://learn.sparkfun.com/tutorials/i2c/i2c-at-the-hardware-level

Microchip GPIO expander MCP23017 :

• https://www.microchip.com/en-us/product/mcp23017
• https://learn.adafruit.com/using-mcp23008-mcp23017-with-circuitpython?view=all 👌
• https://www.woolseyworkshop.com/2021/03/18/adding-digital-io-to-your-arduino-part-3-the-mcp23017/

Rotary encoders :

• https://learn.adafruit.com/rotary-encoder?view=all
• https://howtomechatronics.com/tutorials/arduino/rotary-encoder-works-use-arduino/
• Alps EC11E series : https://tech.alpsalpine.com/e/products/category/encorders/sub/01/series/ec11e/
• Bourns PEC11R series : https://www.bourns.com/products/encoders/contacting-encoders

Bill Of Materials (BOM) :

The BOM and an interactive BOM (HTML version) for components assembly are in the kicad folder.

Note

Big thanks to the Adafruit company, to all Python, MicroPython, CircuitPython communities. ❤️

Happy coding & have fun ! 🥳