What do you get for the geek who has everything and likes LEDs? A tricked-out LED tester, naturally. [Dave Cook]’s deluxe model sports an LCD screen and two adjustable values: desired current and ...

The simple Diode and LED Tester presented here costs under £5 to build (including all components, the battery and a cheap case) and will indicate the polarity of almost all types of LED and other ...

If you’ve worked on a project with small LEDs, you know the frustration of determining their polarity. This ingenious LED Probe from [David] packs a lot of useful features into a simple, ...

This simple LED tester consists of a current source with a potentiometer that can be used to adjust the current. The current source is implemented using a type TL081 opamp. The output current of the ...

Basic tester looks ok , except read voltage analog calibrated function should be used with esp32. Bluedisplay tester looks ok Both need some tweaks for PWM resolution and other variable consistency ...

The presented solution for measuring voltage of Zener diodes using Arduino is completely new and original. The circuit uses LM317 as a constant current source and the whole measurement process is ...

LEDとは、発光ダイオードのことで、電流を流すと光を発する半導体素子のことです。LEDは省エネルギーで長寿命、小型・軽量、高輝度、高速応答性などの特徴があり、様々な分野で活用されています。 LEDの歴史と発展 LEDの原理は1907年にヘンリー・ジョセフ ...