Some.This project consists of three sections. This makes the presentation more attractive and perceivable. Basically, an ALU is made up of: an arithmetic and logic units.By using this mode, the colour, shape, size and text related to the component can be modified.
Here in this project, we have used a sensor module namely DHT11 that already has discuss our previous project namely “ Humidity and Temperature Measurement using Arduino”. This species can be identified as a Gram-negative rod that is motile, urease-positive, lactose-negative, indole. Urease production and robust swarming motility are the two hallmarks of this organism. And last part of system shows humidity and temperature on LCD and Fan driver.Proteus mirabilis is well-known in clinical laboratories and microbiology survey courses as the species that swarms across agar surfaces, overtaking any other species present in the process. The second section reads the dht11 sensor module’s output and extracts temperature value into a suitable number in Celsiu s scale and control the fan speed by using PWM.
We have created PWM at pwm pin of arduino and applied it at base terminal of the transistor. It is utilized for circuit planning and its testing.Working on this project is very simple. It is best programming for understudies of gadgets and material science. The 'Proteus 8.1 Professional' is accessible at this point.
LCD is directly connected to Arduino in 4-bit mode (Check this tutorial for more details: LCD Interfacing with Arduino Uno). (To understand more about PWM, check this circuit: 1 Watt LED Dimmer)The main game of PWM is digital pulse with some duty cycle and this duty cycle is responsible for controlling the speed or voltage.Suppose we have a pule with duty cycle 50% that means it will give half of voltage that we apply.Arduino Temperature Controlled Fan Circuit DiagramConnections of this temperature controlled fan circuit is very simple, here a liquid crystal display is used for displaying temperature and Fan speed Status. This concept is used in the project to control the voltage using PWM. To understand it more simply, if you are applying 5 volt for driving a motor then motor will moving with some speed, now if we reduces applied voltage by 2 means we apply 3 volts to motor then motor speed also decreases.
To do this, follow this steps :2. You need to add “dht library” to work with DHT11 sensor. To make it work (according to written code), you have to connect LCD pins like this :Now. Digital pin 9 is used for controlling fan speed through the transistor.Lcd.print(temp) // Printing temperature on LCDThe diagram shown is wrong. And a DHT11 sensor module is also connected to digital pin 12 of Arduino.
You’ll find a folder named “Arduino-master”. Zip file, at first extract it. You can find the location of your sketchbook folder at File > Preferences > Sketchbook location in the Arduino IDE.This means : after downloading the.
Now compile the code, you won’t have any error.One last thing : Connect 2N2222 transistor properly. Then paste “DHTstable” folder there.There you go, you’ve completed your library setup. Then go inside “libraries” subfolder. Now, in documents, go to “Arduino” folder. If you can’t find it, open your Arduino IDE, then check : File > Preferences > Sketchbook location. Copy this ‘DHTstable” folder to your “Sketchbook location” , which default is : This pc/Documents/Arduino.
Otherwise, your circuit will be open, & the fan won’t work.I tried to explain step by step, hope this’ll help u guys.
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