
The gPiO box works with both the original Raspberry PIs (with a 26 pin GPIO connector) and the newer Pis (with a 40 pin connector).
The newer Pi's have many more GPIO pins available. Using a PiDapter with one Raspberry Pi and two gPiO boxes doubles the number of inputs (from 4 to 8) and outputs (from 6 to 12).
If you look at our Quiz project you can see how we use the PiDapter
“When I first got my hands on a Raspberry Pi early experiments with breadboard and jumper wires were a disaster. I had decided that there probably wasn’t a niche for the Raspberry Pi at KS2 until I got my hands on a set of gPiO interfaces. I now teach physical computing on the Pi throughout my school, starting with children as young as 8 – and they love it!”