I am creating a LED project and I am in need of assistance on where to put my resistors and any issues w/ burnt out LEDs Answered
I am creating a project where a motion sensor turns on a row of lights. Now it will turn them on in a particular order. So while learning LED and resistance I came across some questions.
If I place my LEDs in parallel i understand that I can run all off the same Volts, I just add up the Amps on all. I saw that they recommend putting a resistor on each led in case one burns out.
1) Why can I just use one after all the LEDs?
2) If I were to wire it so all the LEDs have resistors does that mean I have to use higher resistors so they keep dividing from each other?
3) How can I make each light function separately but use the same Voltage?
4) What is the outcome if a led were to burn out in a series and/or parallel?
If I am being unclear let me give you a random unthought out scenario-
Lets say I have 9V Battery
2.2 Vf at 20mA each
I believe that I cannot run all the LEDs in series because they will use all the voltage available.
So I must run them in parallel.
My math goes: 9v/ .160mA= 56.25 ohms resistor which would be bumped up to whatever is closest.
Now comes Q2 above. with the scenario above would I use 8 450 ohm resistors in parallel?
Now with that scenario in play what is Q3
I want to power all the LEDs with 9V or whatever but want to run them separately (turn off and on)...
I am sorry for probably confusing everyone who read this but I would appreciate the help... still learning. Take it easy everyone.