Basic PIC circuit is not working

I have just begun in the world of micro-controllers, and the first micro-controller. I chose to work with was the PIC from Microchip. The PIC I am using is the PIC16F877A. I am using MPLAP IDE and HI-TECH C. I am trying to make an extremely simple program that turns on an LED. This is the code I am using:

Basic PIC circuit is not working#include<htc.h> #define _XTAL_FREQ 8000000 __CONFIG(UNPROTECT & PWRTDIS & WDTDIS & HS & LVPDIS); int main() { TRISB0 = 0; RB0 = 1; while(1);}

When I hookup the PIC to my circuit the LED does not turn on.

A few other notes about my circuit:

  • I am using a 9 volt battery hooked up to a 7805 regulator for the power supply
  • I have measured the voltage coming from pin RB0 with a multimeter and it measures 0.0V.

Basic PIC circuit is not working Schematic

  • If there is no problem with my circuit I could have programmed the chip wrong
  • My capacitors hooked up with my crystal are 22pf not 22uf
  • I have put 100uf capacitors between pins 11 and 12 and between 31 and 32


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About The Author

Ibrar Ayyub

I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation, and engineering. I have a clear and simple writing style and am skilled in using infographics and diagrams. I am a great researcher and is able to present information in a well-organized and logical manner.

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