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thanks bob.by the way, im using mikroC for the PWM. but the problem is mikroC only allows duty cycle from 0-255 thats 8 bit accuracy. i noticed that pic16f877a can perform PWM up to 10-bit accuracy.
anyone can help?
i had the same problem as yours. the zener somehow caused a drop in the voltage. by removing that i get full range of voltage. i dun quite understand why though. i even change the zeners but same problem arises.
Hi all, i have a question. Is it possible to use the PWM module of PIC16f877a as a D\A converter just by varying the duty cycle ?
for eg. 2.5v = 127 duty cycle
and the output is connected to a simple two pole RC filter.
What are the values of R and C do i have to use ?
How fast is the...
Hi ryu, thanks for the advice.
Yes i noticed that adc_read() returns value in 10-bit unsigned number.so i need to divide it by 204.8
reason
1024 = 5V
let v=vold=5v
we = (5 - (0.5*(5-5/200))-(5/100))/0.01 = 495rad/s
using 1024
we = (1024 - (0.5*(1024-1024/200))-(1024/100))/0.01 = 101376
so i...
i have tried to program with C. Can anyone check whether what i have done is correct?
unsigned v,vold;
unsigned we;
void main(){
ADCON1 = 0x80; // Configure analog inputs and Vref
TRISA = 0xFF; // PORTA is input
TRISB = 0;
TRISD = 0x3F;
for (;;){
vold = Adc_Read(2); // Get...
Is it possible to solve differential equations using PIC ? Using C programming codes one could easily solve it. But can it be implemented using PIC?
Thanks
dc motor differential equations
Hi Pow, Yes i want to make a hardware model of a DC motor.
In other words make the PIC behave as a DC motor.
What im doing now is to implement a hardware in the loop plant using PIC rather than using a real DC motor.
do u have any idea to do it ?
modelling of dc motor
Hi everyone,
I am a newbie in microcontroller programming. I have a problem now where i want to model a dc motor using PIC16F877A.
from the dc motor equations
V = iR + Ldi/dt + Vemf,
T = Jdw/dt + Bw (w is motor speed)
where Vemf = Kw
and T = Ki
How do i...
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