The MCP23017, a 16-bit I2C GPIO expander, has always been a tasty chip. With 16 GPIOs addressable over I2C, proper push/pull outputs, software-enabled pull-ups, eight addresses, maskable interrupts ...

We really love when hacks of previous hacks show up in the tip line. It shows how the hardware hacking community can be a feedback loop, where one hack begets the next, and so on until great things ...

Chandler, Ariz.— To help designers save development time and cost, Microchip Technology Inc. has designed a pair of 16-bit I/O expanders to provide system I/O expansion through existing ...