Building an M5Stack Core Snap Circuits numbers and letters device

The Snap Circuits Arcade Game numbers and letters device will allow a sequence series of letters and numbers to be displayed on the LED MC. Typically, the selector switch’s C button is used to manually sequence the letters and numbers. You will bypass the selector switch with an M5Stack controller. The M5Stack controller will be wired to an electromechanical relay. The electromechanical relay’s contact will act as the replacement for the C button. A basic block diagram of the controller design is shown in Figure 4.8:

Figure 4.8 – M5Stack controller block diagram

You will use an off-the-shelf electromechanical relay module to act as the switching interface device between the M5Stack Core and the LED MC. This kind of electromechanical relay module device is shown in Figure 4.9. The electromechanical relay module has one set of normally opened switching contracts –...