Any electricians out there?
I have an LED that uses 2,2 volt and since the axoloti shoots out 3,3 volt I need the right resistor!
Can someone help me?
Simple resistor question
Harry-Butter
#1
benrogmans
#2
Get familiar with Ohm's law. Lookup the current (ampere) of your LED and do the math:
http://www.ohmslawcalculator.com/ohms-law-calculator
Gavin
#3
About 200 ohms should be OK.
You could go a little lower, but that depends on what you are trying to do.
If you just want to light the led up, the 200 should be fine.
BrianA
#4
In series with an LED across the power supply, the resistor functions as a current limiter. The current flow effects the LED brightness. What I do in this situation is put a potentiometer (I'd try a 1KB pot), starting at 1K (not zero or you'll fry the LED) and slowly decrease it until you get the desired brightness. Then measure the setting and substitute a similar fixed resistor.