The PROTO+ is part of our Inventor’s Kit. It has a 6-Channel ADC that can read up to 5 Volts on each channel. The channels are connected to our MCU with decoupling capacitors to GND as well as 470 kOhm to GND as well.
The 40 pin connector on the top of the pi-topPROTO+ is synonymous with the Raspbery Pi 40pin connector and there’s 3V3 and GND available on all 4 corners of the Add-On. The breadboard isn’t electrically connected to any of the hardware, so you’ll need to jumper wires to connect up the columns