I've 3D printed some letters for the grandkids and they call for 5mm LEDs for a diffused backlight, one has 21LEDs the other 26, I purchased a kit containing 5 colors RGBYW, according to the data sheet they all are 20ma 2.0-2.2v, whereas research shows different color LEDs have different voltage drops from 2.0-3.6
According to a LED calculator resistance would vary from 30ohm (2x2.0v) to 150ohm (1x3.6v) Questions are what resisters should I use? Should I trust the label on the LED box or the voltages from my research? I was going to run a 5v power supply but at this stage I can change to another voltage, Would that be advantageous?
According to a LED calculator resistance would vary from 30ohm (2x2.0v) to 150ohm (1x3.6v) Questions are what resisters should I use? Should I trust the label on the LED box or the voltages from my research? I was going to run a 5v power supply but at this stage I can change to another voltage, Would that be advantageous?