hi guys,
I have problem to make program for this project, i'm use PIC16F877A and i also use GSM modem as receiver path. One thing how to combine LED dot matrix in this project.what should i do for combine all in one circuit?

 

Do you have a schematic?

 

i want to modified from this circuit,but not clear

 

Your´re right, the schematic is very small. but it seems pretty straightforward. Top left is the PIC with voltage regulator etc., bottom left is MAX232 RS232-to-TTL converter which you will replace with your GSM module, and the right side is a multiplexed display with it´s drivers.

What do you need help with?

 

i don't know the type of drive use at display path...
here i attach some review pic about project, I get from internet.
I plan to do same like this..