Building a touch control relay controller

You now have the technical skills and knowledge from the previous project to build a touch control relay controller. The concept for the touch control relay controller is that the M5Stack Core2 will provide a nice UI to operate the Freenove Projects kit onboard transistor relay driver. The Freenove Projects kit onboard transistor relay driver circuit is built using five basic electronic/electromechanical components. The five basic electronic/electromechanical components are two fixed resistors, an LED, an NPN transistor, a silicon diode, and a single-pole double-throw (SPDT) electromechanical relay. An electronic circuit schematic diagram is illustrated in Figure 6.32:

Figure 6.32: Onboard transistor relay driver circuit schematic

The convenience that the Freenove Projects kit provides is that the transistor relay driver is completely populated and assembled on the PCB. Such convenience allows M5Stack Core2 controller...