SMD soldering and I2C 32BIT IO for Pi Or Arduino @CallousCoder

Uploaded September 2021 | Updated September 2026, 8 hours ago

We will create an I2C 32BIT GPIO extender, that can easily connect to a Pi or Arduino.

We will show you how to solder in an unmodified toaster oven.

And go through the code.

Adafruit URL in case you want to use it with Python
learn.adafruit.com/using-mcp23008-mcp23017-with-circuitpython/python-circuitpython

KiCad Schematics and PCB:
github.com/rdoetjes/tuts/tree/main/mcp23017/schematics/i2c-32io

Code
github.com/rdoetjes/tuts/tree/main/mcp23017

SMD soldering and I2C 32BIT IO for Pi Or Arduino

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