Simple TTL Interface (ART415E)

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This circuit can be used as an output interface for personal computers which have the parallel (old) port and also as shield for microcontrollers with the appropriate adaptations. The components used are common.

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
Figure 1

 

 

The printed circuit board is shown in Figure 2.

 

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.