Step 8Inputs/Additional Outputs
RA0, RA1, RA2 and RA3 run directly to the PIC pins they can be used for switch inputs, AdC Input, or even for additional outputs, such as MOSFETs for multiplexing or a shift register.
The 6-pin header and housing can be used to attach an external circuit into the main controller. There are the 4 input/output pins in addition to +5v and GND.
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