Hi all, I am almost sure someone has already inquired about this however I was not able to locate the thread, so my apologies if this turns out to be a re-post.
I have been trying to wire up an LED light and I have been having problems with choosing the correct resistor.
My LED operates at 3.7-4.2v, the maximum current I’d like for it to operate at is 850-950mah. My power source is a lithium battery capable of 4.2v, 3500mah.
1. How can I calculate the resistor I need?
2. What if I wanted to run two of these batteries in parallel where the current would double to 7000mah, would resistor heat become an issue?
Cheers.
I have been trying to wire up an LED light and I have been having problems with choosing the correct resistor.
My LED operates at 3.7-4.2v, the maximum current I’d like for it to operate at is 850-950mah. My power source is a lithium battery capable of 4.2v, 3500mah.
1. How can I calculate the resistor I need?
2. What if I wanted to run two of these batteries in parallel where the current would double to 7000mah, would resistor heat become an issue?
Cheers.