8 Bi-direction IO I2C Expansion Board With Isolation Protection For Raspberry Pi

Description: The module use the Raspberry Pi Model B through the I2C bus to expand 8 bi-direction IO. You can operate Pin A0,A1,A2 through the mini jumper to choose the I2C address. You can choose maximum 8 different address from 0x20-0x27.The module lead to the Raspberry Pi's GPIO again so you can cascade maximum 8 modules one by one Features: Input voltage:5V or 3V 8 bi-direction IO Provide Isolation protection Communicate with I2C bus Expand 8 modules maximum 8 different I2C address that you can choose Reverse insert will not disturb the module IO definition The EXT0-EXT7 are 8 bi-direction GPIO that you can use. There are 6 Pins near the letter " ADDR". They are Pin A0,A1,A2.You can choose different I2C address through the setup the mini jumper. Package Included: 1x I2C expansion board