Int potAnValue = analogRead(pot) // read the input pin declare pin 3 and A0 to be an output and input respectively: Int pot = A0 // potentiometer is connected to analog pin 0 Int motorPin = 3 // the pin that the motor is attached to Upload the code given below to your Arduino board:ĭC Motor speed control using TIP120 with Arduino and potentiometer To know more about Arduino PWM frequency change, read this article. But you can connect it to any other PWM pin according to the Load PWM frequency OR switching frequency requirements. Base of the Transistor is connected to the Digital PWM pin 3 of the Arduino UNO here.Load can be a Motor, a lamp, solenoid etc.Connect the Arduino to the transistor using the required components as shown in the circuit diagram above.To use TIP120 with Arduino follow these steps: Arduino takes analog input from the potentiometer and sets the voltage across the load according to it. You can use any other load like a lamp or solenoid in place of the motor.Ī potentiometer is used to set the speed of the dc motor. In this example, a DC motor speed is controlled using TIP120 with Arduino. For instance, the best FM transmitters can associate with cell phones and mp3 players to communicate, and broadcast music and web recordings.Circuit of DC motor speed controller using TIP120 with Arduino The FM transmitter ought to associate with various gadgets.You can control this FM transmitter circuit with any size/sort of 1.5V or 3V battery. The least receiving wire or antenna length ought to be 12 inches however on the off chance that you need to expand the range, at that point increment the radio wire length to 30 inches. Furthermore, stop where you found the sound of your music.

At that point set your FM radio recurrence or frequency on a clear spot and marginally change the transmitter’s trimmer with a nonconductive instrument. In the wake of making the circuit, apply control and associate it to the sound yield of your FM transmitter device. At the nearby inductor, there is a 1-30 pF trimmer capacitor, which is utilized to alter the recurrence or frequency of this mp3 FM transmitter.

Moreover, evacuate the structure in the wake of winding the inductor. The circuit reference here can likewise operate in such a way that the inductor L1 is equivalent to 8 to 10 turns of 22 enameled wire twisted on a 6mm structure.

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