Led Interfacing with PIC16f73

LED Interfacing: According to Logic 1 the output of PORT PIN is 5 v 2ma or according to the data sheet. This output current is not enough to drive any type of load like led, motors, relay etc. In case of LED it requires at least 5ma current and 20 Ma for full glow. So here we have to put a driving circuit. Between MC Pin and load. The driving circuit Provide the sufficient current to load.

The below fig shows the eight LED interfacing through ULN 2803 and PIC16F76.



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