This shield circuit or interface may be used for a variety of purposes to control the flow of data between a microcontroller or computer and a controlled circuit.
The power supply must be made with a 5 V voltage and the outputs must take into account the available current capacity, possibly triggering power stages.
The complete diagram of the interface is given in Figure 1.
Figure 1
The printed circuit board is shown in Figure 2.
Figure 2
The positions of the integrated circuits must be observed in the assembly and the tracks must be carefully checked so that shot does not occur.
