Check and compare intensity
Published in issue 378, June 2008
LEDs are used everywhere these days, not just as on/off indicators any more but now also as a source of light. Before you mount an LED in your circuit it would be nice if you could first check whether you have the right type and how much current it needs to have for it to be bright enough.
The simple circuit described here allows you to test LEDs quickly and make a distinction between low-current and high-efficiency types.
Click below to download a PDF copy of this article from Elektor magazine.
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.