![]() ![]() They share a common Anode, but three separate Cathodes, one for Red, one for Green, and one for Blue. For more on the history of the Light Emitting Diode, or LED, you can go here on Wikipedia įour pin RGD LEDs are a little different. Usually resulting in nothing more than an open circuit as voltage cannot flow. This means that if you cross connect the Anode (+) and the Cathode (-), nothing happens and your circuit fails. It is in their name - Light Emitting Diode. Whats that have to do with LEDs you ask? Well LEDs are by nature diodes. For more on the history of the Diode, your welcome to check them out on Wikipedia The first diodes were used as rectifiers in decoding radio signal modulation. ![]() They prevent the voltage from flowing through, except in the direction of their flow. They have a flow direction, and if inserted backwards do not work. What is a diode? It is the electronic equivalent of a one-way valve. I searched for some time to find a common resource on them and this Instructable is an attempt to pool the fruits of that search into one place.īut first, a word about diodes. However they can be a pain in the neck to work with and they too often come with little or no documentation. RGB LEDs are fairly useful in projects allowing for a wide range of color from a single unit.
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