SX1509 I/O Expander Breakout Hookup Guide

Contributors: jimblom

Hardware Assembly

You'll need to solder something into the SX1509 Breakout to use it, whether that something is male or female headers or wire is completely up to you and your intended application. If you've never soldered before, check out our PTH soldering tutorial.

One option we like, which keeps the board as breadboard-compatible as can be, is soldering male headers on the I/O banks, and female headers on either (or both) of the power/I²C headers.

Then you can use male-to-male jumper wires to connect between your microcontroller and the breakout, and breadboard the rest of the I/O.