Guys, is it possible to develop a current regulated LED tester, which is only the size of a small matches box? Well, it might sounds like the story in “1001 Arabian Nights”, but nothing is impossible, especially in this quirky 21st century! DanZen from instructables made this real.

Well, for those who assumed that all LEDs could be powered with a constant 3V power source, please rise up your hand! Ok, did you know that LEDs in fact have a non-linear current-voltage, where the current grows exponentially with the voltage supplied. Furthermore, many people also misunderstood that all LEDs of a given color will have a specific forward voltage. Actually, the forward voltage of an LED doesn’t depend on the color alone.

By using the current regulated LED tester, it allows you to determine the exact voltage and current to supply to your LED.

Current Regulated LED Tester

Oh, you’re wondering how to use the current regulated LED tester? Well, there are two simple ways to use it. Firstly, you might want to plug it into the female header (You can refer on the above figure, where the anode is on the right hand side top, while the cathode is at the bottom one.) Or, you can use the magnetic SMD adapter and places the LED terminals on the adapter!