SparkFun 16 Output I/O Expander Breakout - SX1509
SparkFun Electronics mail
OSHWA UIDUS000938 Project Website
January 08, 2021
United States of America
The SX1509 Breakout is a 16-channel GPIO expander with an I2C interface – that means with just two wires, your microcontroller can interface with 16 fully configurable digital input/output pins. But the SX1509 can do so much more than just simple digital pin control. It can produce PWM signals, so you can dim LEDs. It can be set to blink or even breathe pins at varying rates. This breakout is similar to a multiplexer or "mux," in that it allows you to get more IO from less pins.
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