The clickable and illuminating I2C controlled GPIO exansion board.
An I2C controlled, breadboard friendly GPIO exansion board based on the Texas Instruments PCF8574 with builtin buttons and LED's for prototyping.
With 8 built in LEDs and 8 tactile swtiches, each GPIO port can be used as an input or output.
Connect the inbuilt switches directly to VCC or GND or utilise the breakout pins for your own purpose.
Mount the board anyway you see fit and have the option to connect any port via the provided breakout pins.