The Raspberry Pi Zero is a tiny $5 single-board computer with a 1 GHz ARM11 processor, 512MB of RAM, two micro USB ports, and a microSD card slot, and a mini HDMI port, as well as a 40-pin GPIO header ...
When the first Raspberry Pi rolled off the production line back in 2012 it sported a 26-pin expansion header that seemed to conceal endless possibilities. A later upgrade to the 40-pin header we have ...