SX1509 I/O Expander Breakout Hookup Guide

Contributors: jimblom

Resources and Going Further

Here are a few SX1509 and SX1509 Breakout-related resources you may find handy, as you begin to build your I/O-expanding project:

• Schematic -- A PDF of the breakout board's schematic.
• Eagle File -- A ZIP of the breakout board's Eagle design files.
• Datasheet (SX1509) -- This datasheet has everything you'll need if you want to mess around with the SX1509's register data, or build the SX1509 into a PCB design of your own.
• Arduino Library -- This is where you'll find the latest version of the SX1509 Arduino library.
• GitHub Repository -- Here's where we host all of the design files for the SX1509 Breakout.

What are you going to build with the SX1509 I/O Expander? Any project that needs 16 or more outputs is bound to be blog-worthy. Let us know what you build with it! If you need any inspiration, here are a few tutorials you may find enlightening:

• Using the Serial 7-Segment Display -- You can bit-bang an SPI interface using the SX1509, and use it to drive this 7-Segment LED. Or! Use the SX1509 to drive a basic 7-Segment display.
• Using the Arduino Pro Mini 3.3V -- The Arduino Pro Mini pairs very well with the SX1059!
• Bubble Display Hookup Guide -- These awesome little bubble displays are ripe for interfacing with the SX1509.