“Useful tool for testing, and determining characteristics of LEDs, as well as a calculator for calculating the series resistor.
Light Emitting Diode as an electronic component are very often used in electronic devices. There are many different types with specific characteristics such as forward voltage and maximum current. Most often it is necessary to connect them to a higher voltage where it is necessary to connect a series resistor with a certain value.
The device described in this video is a useful tool for testing, and determining characteristics of LEDs, as well as a calculator for calculating the series resistor depending on the connected voltage.
The idea for this project was taken from Dave Cook’s model, processed with an Arduino from Jaycar Electronics, and I made some changes to the code where uses an I2C LCD display, and dedicated buttons to control the device, instead of an LCD keypad shield.
The device is very simple to build, and consists of several components:
- Arduino Nano microlontroller
- 16x2 LCD Display with I2C communication protocol
- 7 Resistors
- and four Buttons”