I read somewhere that the transistor is keeping some of the current so maybe the fan doesn't have enough to start ? I don't know I'm kinda lost :). The only weird this is a buzzing sound as sound as I plugged the external source. I thought maybe it's because I'm doing analogWrite on a digital pin (I also wondered why in the tutorial that's what they were doing for the motor?). nothing happened int motorPin = 3 ĭigitalWrite(motorPin, HIGH) // sets the digital pin 3 onĭigitalWrite(motorPin, LOW) // sets the digital pin 3 off When posting code, please use code tags ('</>' button).You would be much better off using a logic level MOSFET, using the circuit below. The code of the motor on the tutorial : int motorPin = 3 Īnd then in the COM interface I have type 0,100,255 etc. The problem with using a bipolar transistor like the PN2222 is the current gain, which is pretty low. It can be used in most applications requiring up to 500mA DC. This very high density process has been designed to minimize on-state resistance while provide rugged, reliable and fast switching performance. The thing I'm afraid of is frying my arduino (I don't think that's possible cause it's no where near the fan nor the power source and to protect the motor I added a reverse diode).įor the code, I tried two things. The BS170 is a N-channel enhancement mode Field Effect Transistor is produced using high cell density, DMOS technology. The only output of the arduino is the control pin (3 in my case on the digital side). Join our upcoming webinars hosted by onsemi experts to learn about the latest intelligent power and sensing technologies. DC Motors | Adafruit Learning System), replaced the motor by my fan (that shouldn't be an issue right?) and added an external power source. Then I follow this tutorial ( Breadboard Layout | Arduino Lesson 13. I connected them to my external 12V source (fan is a 12V) and it works perfectly. April 1995 BS170 / MMBF170N-Channel Enhancement Mode Field Effect Transistor General Description FeaturesThese N-Channel enhancement mode field effect High density cell design for low RDS (ON).transistors are produced using Fairchilds proprietary, highVoltage controlled small signal switch.cell density, DMOS technology. My goal : I have a fan with a 3-pin and I want to control it with an arduino. I have spent a lot of time reading and improving on the different components I use and why (transitor instead of relay in my case etc.) but I'm kinda stuck and I need your help as I'm sure it will be trivial for you :). I'm more of a developper background so the electronic part is quite tricky for me :). *This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.First of all I'm kinda new to the microcontroller environnement. The company was acquired by ON Semiconductor in 2016 and its products and technologies continue to be developed and sold under the ON Semiconductor brand. The company was known for its innovation in the development of the first commercial transistor and for its contributions to the advancement of the integrated circuit technology.įairchild became a leading supplier of power semiconductors, analog and mixed-signal integrated circuits, and other semiconductor products. N-Channel Enhancement Mode Field Effect Transistorįairchild Semiconductor was a pioneering semiconductor company that was founded in the late 1950s.
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