ecaits
Member level 4
Hello Friends,
I am working on PIC16F877 controller based project where I am using ADC module and read the value of connected sensor's output. I am using different types of pressure sensor. I am using LCD to display the value of ADC. Pressure sensor is giving output 0 to 5VDC.
Case 1:
Now I want to detect the sensor in four different conditions.... given below...
1. When Sensor is Open, I want to display "Sensor is Open" on LCD.
2. When Sensor is short, I want to display "Sensor is Short" on LCD.
3. Due to sensor defect, if sensor gives reverse voltage to Analog pin then I want to display "Sensor Fail" on LCD.
4. Due to sensor defect, if sensor gives over voltage to Analog pin then I want to display "Sensor Fail" on LCD.
How can I sense the sensor's failure condition given above???
Case 2:
Some sensor is giving 4-20 mA output which I need to convert it to 0-5V output. How Can I convert I2V??
Plz provide me any circuit which helpful to me.
Thank you in advance.....
Nirav
I am working on PIC16F877 controller based project where I am using ADC module and read the value of connected sensor's output. I am using different types of pressure sensor. I am using LCD to display the value of ADC. Pressure sensor is giving output 0 to 5VDC.
Case 1:
Now I want to detect the sensor in four different conditions.... given below...
1. When Sensor is Open, I want to display "Sensor is Open" on LCD.
2. When Sensor is short, I want to display "Sensor is Short" on LCD.
3. Due to sensor defect, if sensor gives reverse voltage to Analog pin then I want to display "Sensor Fail" on LCD.
4. Due to sensor defect, if sensor gives over voltage to Analog pin then I want to display "Sensor Fail" on LCD.
How can I sense the sensor's failure condition given above???
Case 2:
Some sensor is giving 4-20 mA output which I need to convert it to 0-5V output. How Can I convert I2V??
Plz provide me any circuit which helpful to me.
Thank you in advance.....
Nirav