Dht11 Proteus Library
Taneka Tarring
The following are the materials required to perform a temperature-based fan speed control using Arduino. Most of the components should be easily available in your local hardware shop
Please install the DHT library properly, and make sure that dht.h file is there in the folder. Remember that header file name is case sensitive, if file in the DHT library folder is DHT.h then use DHT.h not dht.h
I've already run your codes without any error... but the fan spinning at the same speed even though in different temperature. could you help me with the problem please... this technique is so crucial to my project. thank you
hallo, by the way thank you for your shared
i have a problem when i want to compile the source code, arduino says 'dht' was not name a type
what should i do?
please your advice
thank you anyway
please assist,
Even after downloading and installing the DHT file,when i compile the code,i get this error
Exit status 1
'dht' does not name a type
Can you assist please? Thank you
Please read all the above comments carefully, and install the DHT library properly, and make sure that dht.h file is there in the folder. Remember that header file name is case sensitive, if file in the DHT library folder is DHT.h then use DHT.h not dht.h
friend this connection is for servo ,motor u need to connect fan and wen u connect fan it is nessery to give ground to the ground in auredino if u do dis ur project wil run sucessfully and it will work properly
Instead of using a battery, can I use a 12V power adapter and have the ground from the fan into ground on my board, and the 12v power running through the 2n2222 transistor and the power from fan into the other end of the 2n2222 transistor?
Instead of DHT11. Is it possible to use DHT22. I have read in many articles, DHT22 have more accuracy. So I guess DHT22 will be more useful. If it is possible to use, will be there any change in coding and other electronic components used in the circuit ??
i did all the things same as said but my fan moves at constant speed.....it doesn't even switches off when temperature falls below the limit and its speed doesn't increases when temperature increases...
PLEASE HELP..
Thanks a lot!
It's only after I read your comment I was able to get my fan to stop spinning at a constant speed for all temp.
Great project,very useful.
So yeah, if your error is that fan is spinning at constant speed connect negative of fan to collector of 2222 ,negative of 9V to emitter and a wire from emitter to GND line of arduino.
New to this environment and struggling with finding the right combination of library and code statements. The constant appears to be 'dht' does not name a type. The library you refer to does not appear in the library manager - updated, renamed or absorbed into a larger one ?
As Sai vasavi mentioned above, even I'm getting the same error:dht.h: No such file or directory. Compilation terminated. Please send the exact link of the library and executable code asap as it is to be submitted tomorrow.
No it does not mean battery is connected directly fan. As you can see there is a switching transistor in-between the fan and battery. If your fan does not reduce speed it means the transistor is not switching.
Please anyone reply
I have added dht file in library of arduino and also for proteus, so finally code successfully run in arduino compiler but proteus shows following two error
* cannot find model file 'DHTXX. MDF
* Simulation failed due to net list linker error
Dear Saddam, thanks for the great share. It is working perfect. Just wanted to know how many identical items can I connect to this PWM ? Or how can I run multiple PWM circuits for multiple fans ? Thanks
I want to control the speed of 3 fans (Not seperately, they will all run same speed regarding the enviroment temperature) They are all 12v 0,30A. Can I connect all 3 to the same PWM circuit ? In other words how many amperes can I run through the circuit ? Thanks
Semicon Media is a unique collection of online media, focused purely on the Electronics Community across the globe. With a perfectly blended team of Engineers and Journalists, we demystify electronics and its related technologies by providing high value content to our readers.
In this project, we will learn about DHT11 Humidity and Temperature Sensor and how the Raspberry Pi DHT11 Humidity Sensor interface works. By Interfacing DHT11 Temperature and Humidity Sensor with Raspberry Pi, you can implement a basic IoT Project like a simple Weather Station.
DHT11 is a Digital Sensor consisting of two different sensors in a single package. The sensor contains an NTC (Negative Temperature Coefficient) Temperature Sensor, a Resistive-type Humidity Sensor and an 8-bit Microcontroller to convert the analog signals from these sensors and produce a Digital Output.
I have already worked with the DHT11 Sensor in my DHT11 Humidity Sensor on Arduino Project. In that project, I have mentioned the Pin Configuration of the DHT11 Sensor, how to interface it with a Microcontroller and how the digital Output from the DHT11 Sensor can be decoded.
In this setup, the Microcontroller acts as a Master and the DHT11 Sensor acts as a Slave. The Data OUT of the DHT11 Sensor is in open-drain configuration and hence it must always be pulled HIGH with the help of a 5.1KΩ Resistor.
The data pin of the DHT11 Sensor, which is an INPUT pin, reads the LOW made by the Microcontroller and acts as an OUTPUT pin and sends a response of LOW signal on the data line for about 80s and then pulls-up the line for another 80s.
By interfacing the DHT11 Sensor with Raspberry Pi, you can build your own IoT Weather Station. All you need to implement such IoT Weather is a Raspberry Pi, a DHT11 Humidity and Temperature Sensor and a Computer with Internet Connectivity.
If you observe the circuit diagram, there is not a lot of stuff going on with respect to the connections. All you need to do is to connect the VCC and GND pins of the DHT11 Sensor to +5V and GND of Raspberry Pi and then connect the Data OUT of the Sensor to the GPIO4 i.e. Physical Pin 7 of the Raspberry Pi.
As we are using the library Adafruit_DHT for this project, there is nothing much to do in the Python Programming part. All you need to do is to invoke the library with the Sensor and GPIO Pin and print the values of Temperature and Humidity.
I am implementing this circuit on proteus so how i am supposed to start the programming part for the simulation of this project?
do i need to download the adafruit library for sensors and lcd in my computer