Temperature Controlled Dc Fan

By monitoring the temperature.

Temperature controlled dc fan. Here we are going to make a temperature controlled dc fan. This is an updated version of the old circuit designed by d mohankumar that didn t function at all. Tugas besar proyek el4121 embedded system 2017. Temperature controlled dc fan dc motor image december 18 2017 mnandraditoyib 1 comment.

Schematic of dc fan controlled by temperature circuit. It works on the principle of thermistor. When the temperature increases the base current of q1 bc 547 increases which in turn decreases the collector. In this arduino based project we are going to control dc fan speed according to the room temperature and show these parameter changes on a 16x2 lcd display.

Dht22 sensor is used to sense the room temperature and then we adjust speed of a dc fan motor accordingly using pwm pulse width modulation. Sistem yang dibuat dapat bekerja dalam 2 mode mode manual yang dapat mengatur kecepatan putaran motor dc. The block diagram of the temperature controlled fan using a microcontroller is shown in the above figure. Here is a simple circuit based on two transistors that can be used to control the speed of a 12 v dc fan depending on the temperature a thermistor r1 is used to sense the temperature.

Working of temperature controlled dc fan using thermistor. In this circuit pin 3 non inverting terminal of op amp 741 is connected with the potentiometer and pin 2 inverting terminal is connected in between of r2 and rt1 thermistor which is making a voltage divider circuit. We will use the dht22 sensor to get the temperature value and we will print this temperature value on the lcd. Pwm is a technique by using which we can control voltage.

In this article you are going to learn about arduino temperature controlled fan using dht22 sensor and relay. Circuit components arduino uno. I had to remove the leds and use different values for r1 and r2 and now it works as you can see in the video below. Achmad ariyanto hariman 13214035 dan mochamad nandradi toyib 13214054 1 requirement.

Note by p marian. Then we will check if. Temperature controlled dc fan. Temperature controlled dc fan can be used to control the temperature of devices rooms electronic components etc.

Simplest 12v cooling fan controller with temperature status using thermistor temperature sensor ntc mf52 103 thermistor nec d882 tp 120 and tl431 transist. Can be extended to pwm based output where the speed of the fan can be varied according to the duty cycle of the pwm signal. The block diagram includes power supply rst circuit 8051 microcontrollers lm35 temperature sensor 8 bit adc l293d motor driver dc motor 7 segment display i p switches. The circuit can be used in cpu to reduce the heat.