The SX1509 16 Output I/O Expander Breakout Board makes it easy to prototype using the SX1509 so you can add more I/O onto your Arduino or I/O limited controller. It can leverage your I2C interface for ...

Makers, hobbyists and developers that enjoy building projects using the Arduino platform might be interested in a new Arduino micro-controller expansion board called the Spectrum I2C. The Spectrum I2C ...

A while ago I received a couple of I/O port expander modules that use the I 2 C protocol. Using that Chinese module, you can use only the SDA and SCL pins of your Arduino, or any microcontroller ...

PCF8574 pcfSwitch1(0x20); // Address for the first PCF8574 module (switches) PCF8574 pcfSwitch2(0x24); // Address for the second PCF8574 module (switches) PCF8574 pcfSwitch3(0x25); // Address for the ...

Although there are other ways to do this, [Rod] has decided to write up his method of using two Arduinos and the I2C protocol to expand an Arduino’s IO capacity. As seen in the picture above, you’ll ...

This 24-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL ...

Odds are if you know the name Arduino, it’s through its connection to the DIY community. Much like Raspberry Pi, the company built its reputation creating microcontrollers for hobbyists. But the last ...