Temperature Sensor Using Microprocessor 1

Practical #11.

Temperature Sensor

Objective:

Using Microprocessor Trainer and Assembly Language Instructions develop following sensors

• Temperature
• Smoke

How to Use:

• The heater and thermostat system is connected to Port 03. Send 00 to port 3 to turn the heater off.
• Send 80 to port 03 to turn the heater on. Input from port 03 to test the thermostat state. The code snippet below is an incomplete solution to control the heater to keep the temperature steady at about 21 C.
• You can click the thermometer to set the temperature. This can save time when you are testing the system.

; ===== Heater and Thermostst on Port 03 ==========================

; ===== Temperature sensor.asm ==============================================

; ===== Heater and Thermostst on Port 03 ==========================

MOV          AL,0           ; Code to turn the heater off

OUT            03                ; Send code to the heater

IN                03                ; Input from Port 03

AND           AL,1           ; Mask off left seven bits

JZ                Cold            ; If the result is zero, turn the heater on

HALT                             ; Quit

Cold:

MOV          AL,80         ; Code to turn the heater on

OUT            03                ; Send code to the heater

END

By: Miss SABA WAHAB

Figure 1 Temperature monitoring

Figure 2:Temperature monitoring Exi file

Temperature Sensor Using Microprocessor

MICROPROCESSOR PRACTICAL NOTE BOOK                                                              WRITER: MISS SABA WAHAB