MCP23017 QT breakout #comingsoon

We’ve been asked a few times to make an MCP23017 breakout board – wiring up the raw chip is a bit difficult for some. Here’s a loooooong STEMMA QT board with all 16 IO pins broken out and matching ground pads for each. It could make for an easy plug-n-play expander. With 3 address pins, you could have 8 of these on one I2C bus for 128 total GPIO.