Firstly, hi to u all for taking ur time to help out in my problems ^^
I am using PIC16F84 and also building the famous HeMon Heart Beat MOnitoring circuit. however, may i ask, is the 4Mhz crystal crucial in the whole ciruit?
Becos i nv add it in, the LM358 IC i can hv a signal to showing the up n down signal produce when my pulse is read.
However, i dun get to see the 7-Segment ( common cathode ) showing any number or even light to show it is connected. =(
Furthermore, can i ask abt the programming part of the 3 files.
when i use the PICstart, i added the file HeMon.asm ( assembly codes ) to the assembly part.
next, i added the Reg16c84.INC and HeMon.INC in the Linker part.
Then i build all and all is ok. i clicked Programe and it shows successfully and verified.
But when i put back the PIC16F84 into the circuit board, the LED still does nt show up and my channel two ( connected to Pin 2 of the PIC16F84 is nt showing any up and down signals.)
Thus, i will really be very greatfull if anyone can guide me along the way to get the LED to show up the number of counts thks =)
-With regards-