- Published: Tuesday, 27 July 2010
- Written by Jon Chandler
I'm working on a control system that will have several relays, a bunch of LEDs and a number of switches. I was rapidly running out of port pins on a TAP-28 board to handle all the desired I/O. Possible solutions included adding an I2C port expander such as the Microchip 23018, but this was an additional complexity to the already-expanding project.
Discuss this article in the forums (3 replies).