The final component to install on the circuit board is the central processing unit, or CPU—the brains of the Brain Game.

One end of the CPU has a small notch in it. When installing the CPU, make sure that this notch lines up with the cutout on the IC socket.

Install the CPU by pressing the eight pins into their respective holes in the IC socket.

Congratulations, you have completed the Level 1 Through-Hole Soldering Kit!