How to make Arduino LED Tester + Resistor Calculator

Published at : 23 Dec 2025

This project is sponsored by PCBWAY https://www.pcbway.com/?from=MirkoP
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.
It is very simple to build, and consists of several components:
- Arduino Nano microlontroller
- 16x2 LCD Display
- 7 Resistors
- capacitor
- and five Buttons
This is a really useful instrument in the laboratory, especially due to the fact that many different types of LEDs are used nowadays.

Detailed instructions, schematic, and code at:
https://www.hackster.io/mircemk/how-to-make-arduino-led-tester-resistor-calculator-bb4422

0:06 Short Demo
1:35 Description
2:35 Parts
3:20 Functions
4:40 Demonstration
6:22 Different leds
9:42 Resistor Power
9:54 Building

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Visit my Youtube Channel for more Projects , DIY and How To Make videos:
https://www.youtube.com/c/MirkoPavleskiMK/videos

by mircemk
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#led #arduino #electronics #tester #pcbway