Tutorial
How to chose resistor for LED diode
LED diodes are non linear elements whom I-V characteristic depend from many external parameters such as temperature and manufacture. Mathematically I(U) dependence is described by Shockley diode equation. Unfortunately this exponential dependence, after adding resistor in series, becomes implicit function of current and supply voltage witch can be only solve numerically. That is why we have to simplify things for practical purposes. Here is useful table witch I use for fast choice of resistor for Read more…