A 16-bit I2C IO expander. This soldering kit from Boldport lets you add up to 16 inputs or outputs to your projects.
IxpandO is an input/output expansion board based on Microchip's MCP23017. When you run out of inputs or outputs for your project, use this project to connect up to 16 of them through an I²C interface.
Note: requires surface-mount soldering!
IxpandO was project #16 of the Boldport Club.