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 ...

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 ...

in my implementation steering wheel buttons use a gravity 433mhz transmitter and receiver pair for inputs, but you can easily accomplish the same with normal wired buttons ...

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 ...

The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM. The I/O expandable eight quasi-bidirectional data pins can be independently assigned as inputs or outputs to monitor board level ...

The chipKIT Pi can interface directly to the Raspberry Pi I/O Expansion header without any additional components, reducing both cost and design complexity. Users can also tap into a large repository ...