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Description

I have needed a device to detect the magnetic field in the air when I was working with the magnets and DC motors so I created a basic device which shows the magnetic field integrity and the polarity in the air with the 3144 Hall Effect Sensor. After that, I decided to add an RGB LED test system into the project because I had been getting bored with setting up the circuit for Arduino every time.

The Magnetic Field Integrity and Polarity Test

Sometimes you might want to detect the polarity of the magnet or sometimes you might want to know whether your DC motor works or not without making a circuit for it. And you must have a device that can detect the magnetic field integrity and polarity for the jobs like these.

The Magnetic Field and RGB Tester which is a basic magnetic field detector allows you to make all these jobs basically.

By clicking the second button, the magnetic field integrity is revealed as a pointer and the polarity can be detected by observing the movements of the pointer.

RGB Led Test

Three different potentiometers so you can adjust each LED in an RGB (Red, Green, Blue) which allows you to test your RGB LED easily.

Also, you can see the results on LCD screen when you adjust the number from 0 to 255 by clicking the first button. Moreover, you can use the device as an RGB picker and create special colours.

It is the easiest way to test an RGB LED.

Connections

// Arduino UNO
//                                 LCD Screen
// Pin 2  -------------------------rs
// Pin 3  -------------------------en
// Pin 4  -------------------------d4
// Pin 5  -------------------------d5
// Pin 6  -------------------------d6
// Pin 7  -------------------------d7
//                                 Buzzer
// Pin 8  -------------------------
//                                 RGB
// Pin 9  -------------------------
// Pin 10 -------------------------
// Pin 11 -------------------------
//                                 Button(1)
// Pin 12 -------------------------
//                                 Button(2)
// Pin 13 -------------------------
//                                 Potentiometer(1)
// Pin A1 -------------------------
//                                 Potentiometer(2)
// Pin A2 -------------------------
//                                 Potentiometer(3)
// Pin A3 -------------------------
//                                 3144E Hall Effect Sensor
// Pin A4 -------------------------

After making all the connections correctly, I stuck the Arduino Uno to the top of the first breadboard with a silicon gun and connected an old single turn potentiometer to the LCD screen by using a soldering iron.

Videos

Project GitHub Repository

The project's GitHub repository provides:

• Code files

Schematics

Code

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