[PIC] regulation board and temperature control

[onss]

I have to make a peak-based temperature controller for my PFE, I chose the 16F877A and for the sensor I was advised the LM335, I was helped for programming with microC,
The intended operation is as follows:
- At the connection of the set a green LED indicates the presence of the 5V, the heater is at a standstill.
- When heating an LED (Red) is on.
- The temperature measured by the LM35 is permanently displayed.
- When the desired temperature is reached, an LED (green) lights up. This same LED goes out if the temperature drops below a certain threshold.
I explain my problem:
PUT a standard value in the µc !
make a contact between the µc and the pushbutton !
compare the LM35 and the given temperature value !

 

[barry]

So, what's your question?

 

[c_mitra]

- The temperature measured by the LM35 is permanently displayed.

Temperatures measured as per your indicated procedure cannot be more accurate than 0.1C. To display more significant digits is not a good practice.

With care, you can determine temp accurately upto 0.01C. It is therefore desirable to limit the display to only one dec point.

Do you use both a heater and a cooler for the temp control?

What is the target system (water bath, oven, room temp etc) you are planning to get the temperature?

make a contact between the µc and the pushbutton !

Excellent!