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 ...
The Coast Guard's Research Development, Test and Evaluation Program has been researching the suitability of light emitting diode (LED) devices as effective distress signals. The U.S. Coast Guard is ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback