I cant make sense of it from the pictures. Probably warrants some explanation / circuit diagrams.
Well let's see...
Top left is an old Raspberry Pi of some kind.
Top right is a USB hub with some memory sticks in it. I guess that does not need explaining.
Bottom Left is a big brown piece of Vero Board. That is an old style printed circuit board made of Paxolin. It has a matrix of 0.1 inch spaced holes for poking wires through or the leads of components. Perfect for 0.1 inch pitch logic chips. On the underside of the board are stripes of copper track running north-south that the wires/component leads can be soldered to, thus allowing one to build circuits.
See here: https://en.wikipedia.org/wiki/Veroboard
There is a big grey 40 way ribbon cable connecting the GPIO header to a connector soldered to the Vero board.
Below that we see a couple of rows of jumper pins solder to the board, then a nice area of jumper pins with coloured labels telling the pin numbers, sweet.
Below that we see a row of four slotted optical sensors. Just LEDs shining across a gap to photo diodes, mounted in black plastic cases.
Bottom right is a white "bread board". Again an 0.1 inch pitch matrix of holes for wires component leads. This time the holes contain spring clips to hold the wire ends, no soldering required. Thise clips are electrically connected horizontally in rows of 5.
So, what we have here is a neat way to quickly build up a circuit with chips, transistors, whatever components on the white bread board. Then connect the inputs and outputs of that circuit to the neatly labeled GPIO pins seen on the Vero board using jumper wires.
All in all there is no "circuit" there to diagram. Just the space, mechanical stability and connectivity to enable you to build your own circuits experiments quickly. Which of course is the whole idea.
As it happens I have been eyeing up a 40 pin ribbon cable and piece of Vero board I have with a similar notion. This gives me some ideas....
Memory in C++ is a leaky abstraction .