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An LED is a light-emitting diode. Lighting an LED is considered the "Hello world" of a circuit design, and it can be as simple as putting a series resistor or can get more complicated, involving PWM and multiplexing.

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measurement misstake. I've bought gauss 14.4 LED strip which is marked "5050-60P-12V-10D-V1.1" So 60 5050 LED's per meter. This should consume 14.4W boths according to descriptions of such strips and according … drop on a single LED is 2.9V when it should be 2.3V. Voltage drop on a single LED is 2.9V. For each 3 LED's there are two 39 ohm resistors (marked 390, and measurements confirm that). And I've …
asked Oct 29 '16 by Alexey Guseynov