MCP23017 I2C extension board 16 I/O expander Arduino Raspberry

This extension board is designed to have 16 input or output ports over the I2C protocol. It can be used to trigger transistors, Darlingtons, etc. With the DIP switch, You can choose the I2C address, if You need to have two or more board connectors on the same I2C bus. It have a statdard 2.54 pinout, with INTA and INTB to innterupts.
It can be used in a 3.3VDC environment, like Raspberry Pi, and in a 5VDC environment, by Arduinos.