scientistumair
Newbie level 4
I am new in microcontroller. I have task to design pic microcontroller based temperature monitoring and control using pt100 as sensor. Total 8 pt100 are to interface with pic16f877a. Set points are to be given by keypad and display should be on lcd. Control technicque should be pwm.I am using CCS compiler
First I am controlling and display 1 temperature(i.e. using 1 pt100)
I have following difficulties:
when I interface pt100 to pic then my pic doesnot read analog voltage voltage drop to constant -0.875volts at input of microcontroller. Circuit is as follows
1ma current source:arrow:voltage follower:arrow:noninverting amplifier:arrowic16f877a
I am using lm324 quad opam ic for current source and for amplifier.
which control tecqnique(PI ,PID or pwm) should be used?
How to interface keypads with pic?
First I am controlling and display 1 temperature(i.e. using 1 pt100)
I have following difficulties:
when I interface pt100 to pic then my pic doesnot read analog voltage voltage drop to constant -0.875volts at input of microcontroller. Circuit is as follows
1ma current source:arrow:voltage follower:arrow:noninverting amplifier:arrowic16f877a
I am using lm324 quad opam ic for current source and for amplifier.
which control tecqnique(PI ,PID or pwm) should be used?
How to interface keypads with pic?