Contents
How is a transistor connected to an Arduino?
First leg of the potentiometer is connected to +5 volts. The second leg connected to analog in 0 of the Arduino. The third leg is connected to ground. The base of the transistor is connected to digital pin 9 of the Arduino through a 1-kilohm resistor. The collector is connected to ground.
How is a transistor used to control high current loads?
It’s designed for switching high-current loads. It has three connections, the base, the collector, and the emitter. The base is connected to the microcontroller’s output through a resistor. The high-current load (i.e. the motor or light) is attached to its power source, and then to the collector of the transistor.
Can a DC motor be used on an Arduino board?
To drive a DC motor you need a larger amount of current than Arduino board can give. For that reason you must use a transistor. Transistors have limits and maximum specs, just be sure those values are enough for your use.
Where is the potentiometer on an Arduino Nano?
Breadboard view of a potentiometer connected to analog in 0 of an Arduino Nano. The potentiometer is mounted in three rows of the left center section of the breadboard below the Nano. The two outside pins of the potentiometer are connected to the voltage and ground bus rows, respectively.
How is a transistor used to control a microcontroller?
These pins are meant to send control signals, not to act as power supplies. The most common way to control another direct current device from a microcontroller is to use a transistor. Transistors allow you to control the flow of a high-current circuit from a low-current source.
How is a transistor connected to a potentiometer?
The two outside pins of the potentiometer are connected to the voltage and ground bus rows, respectively. The center pin is connected to analog in 0 (physical pin 4) of the Nano. The transistor allows you to control a circuit that’s carrying higher current and voltage from the microcontroller. It acts as an electronic switch.