Arduino projects: the 3 coolest projects for beginners

Arduino beginners can also make extensive use of the Raspberry alternative. We present the best projects for every hobby developer in this article.

Arduino project: control servo motor with potentiometer

In addition to your Arduino, this project also requires a servo motor and a potentiometer.

Connect the servo to the ground, a 5V pin and a pin that supports pulse width modulation.
The potentiometer is also connected to 5V and ground, but also to an analog input.
The analog value of the potentiometer is read out again and again in the code. Using a map method, the value between 0 and 1023 is assigned an integer value between 0 and 180, which represents the later number of degrees of the servo. For testing, you can copy the following code into your development environment.
#include servo myservo; int pot = 0; int value; void setup () {myservo.attach (9); } void loop () {value = analogRead (pot); value = map (value, 0, 1023, 0, 180); myservo.write (value); delay (15); }

A potentiometer is connected similar to the project above.

In addition, you need to connect some LEDs to the Arduino. Depending on the value reached by the potentiometer, the LEDs are switched on or off in succession.
Again, you can copy our sample code and adapt it to your needs:
int value_pot; int value_LED; void setup () {pinMode (A0, INPUT); pinMode (8, OUTPUT); pinMode (9, OUTPUT); pinMode (10, OUTPUT); pinMode (11, OUTPUT); pinMode (12, OUTPUT); pinMode (13, OUTPUT); } void loop () {value_pot = analogRead (A0); value_LED = map (value_pot, 0, 1023, 0, 6); if (value_LED> 0) {digitalWrite (8, HIGH); } else {digitalWrite (8, LOW); } if (value_LED> 1) {digitalWrite (9, HIGH); } else {digitalWrite (9, LOW); } if (value_LED> 2) {digitalWrite (10, HIGH); } else {digitalWrite (10, LOW); } if (value_LED> 3) {digitalWrite (11, HIGH); } else {digitalWrite (11, LOW); } if (value_LED> 4) {digitalWrite (12, HIGH); } else {digitalWrite (12, LOW); } if (value_LED> 5) {digitalWrite (13, HIGH); } else {digitalWrite (13, LOW); }}

Finally, we would like to show you how you can build a two-player reaction game.

For this we use two buttons, which are connected to pins 7 and 8, and an LED (at pin 8) as an output.
First of all, the LED is activated after up to 5 seconds. Who then was quicker to press is shown in the serial monitor.
You can find a sample code here:
void setup () {Serial.begin (9600); pinMode (2, OUTPUT); pinMode (7, INPUT); // Buzzer pinMode (8, INPUT); // Buzzer delay (random (0, 5000)); digitalWrite (2, HIGH); } void loop () {if (digitalRead (7) == 1) {Serial.println ("Button 1:" + String (millis ())); } else if (digitalRead (8) == 1) {Serial.println ("Button 2:" + String (millis ())); } else {}}

In the next practical tip, you will learn how to build a resistance measuring device with the Arduino.