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Hi, no i have completely removed LEDs it was not a necessary requirement. Thank you so much, code works really well in proteus however i will check on the circuit as well. This is totally different than how i had programmed which means i have to learn a lot about PIC programming. Can you help me...
Thank you andre, i am posting my code to make sure there is no error in the code. i will send PCB pictures tomorrow. i tried keeping the valve far away from the circuit but the as soon as i press start button (please refer the code), the LCD shows 8 BPM (depending on where the rotary switch is)...
Yes i have a while(1) loop in my code please check attached code in text format
sbit LCD_RS at RB1_bit;
sbit LCD_EN at RB2_bit;
sbit LCD_D4 at RB3_bit;
sbit LCD_D5 at RB4_bit;
sbit LCD_D6 at RB5_bit;
sbit LCD_D7 at RB6_bit;
sbit LCD_RS_Direction at TRISB1_bit;
sbit LCD_EN_Direction at...
Hi, the problem comes only when i connect solenoid valve. See this is my connection:
PIC's PIN 18 is connected to ULN2803 pin1 and output from uln2803 pin18 is connected to a relay which takes about 30mA and that relay is used to drive the solenoid valve.
Now, Till this relay part my code...
Hi,
I have tried everything nothing helps. I hope there is nothing wrong with program? because till switching on/off relay it works fine but as soon as valve is connected it my code runs once without switching on the valve and stops in the end.
i replaced valve with low current coil too, but...
Hi, sorry I mentioned it wrong it's 0.1uf. But after the suggestion I tried using both 0.1 and 10uF but it didn't help. I checked the valve itself takes about 2 amps and my smps is 2A I think I should use higher amp rating.
I have used a 22pf across the Vdd and vsspounds of pic should I change to 10uf and try again? I have already used diodes across the relay. In the actual circuit
Hi,
I am using PIC16F877A to drive a solenoid valve it switches it on/off as programmed for specified duration. when i simulated on proteus and on PCB with LED connected instead of LOAD, it worked fine. The on/off cycle continues as desired. But when i connect 12VDc solenoid valve , the PIC...
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