How to control temperature using microcontroller?

Automatic temperature control is a microcontroller based circuit which is used to maintain a temperature specified by the user. The user enters the reference temperature by keypad and then the microcontroller turn on and off the heater or cooler when the temperature is too hot or too cold.

How temperature control system can be interfaced with 8051 microcontroller?

Temperature sensor LM35 is interfaced with the 8051 microcontroller’s analog pin because temperature sensor changes temperature into voltage. The microcontroller controls the DC fan using the IC L293D motor control. This IC L293D is a dual H-bridge motor driver used to control the speed and direction of DC motor.

How to control fan speed using microcontroller?

A circuit with LM35DZ temperature sensor, PIC16F877A microcontroller, brush less DC motor and few of electronic components is designed and implemented to control the fan speed automatically. As an additional feature LCD is used to present the temperature and the fan speed.

How does a microcontroller work with a temperature controller?

The user enters the reference temperature by keypad and then the microcontroller turn on and off the heater or cooler when the temperature is too hot or too cold. PIC 18F45K22 is the brain of this automatic temperature controller system.

What is the circuit of a temperature monitor?

Fig.2. shows the circuit of the temperature monitor system. The circuit mainly consists of the LM35 temperature sensor, PIC16F877A microcontroller and HD44780 controller based 16×2 LCD. The output of the sensor is fed to the internal ADC of the microcontroller.

How does an automatic temperature control circuit work?

Automatic temperature control is a microcontroller based circuit which is used to maintain a temperature specified by the user. The user enters the reference temperature by keypad and then the microcontroller turn on and off the heater or cooler when the temperature is too hot or too cold.

What can a PIC microcontroller be used for?

The primary purpose is to manage the temperature of a given area based on settings by a user of the system. This project uses a PIC microcontroller to automatically control the temperature of an area. This area could be a small plant, a house or any place or device that require a controlled temperature like an incubator (egg) for example.