I am still trying to figure out the very basics of electronics, or certainly the parts I need to know for what I am trying to do.
I've got the very basics (when it comes to using LEDs). + is Positive - is Negative. Resistors are required in order to pump 12v through 3.3v LEDs without burning them out. I can chain 3 LEDs in series per single resistor.
This is where I get confused, and I am not sure if it is just the online simulator I am using that is confusing me.
So, for example, take 5 chains of 3 LEDs (3.3v) with a 120ohms resistor (as suggested by the LED series/parallel array wizard.
So, my question(s).
Should the resistor be placed before or after the LED? Or more specifically, the 12v side or the ground side?
In the image below, you can see I've tried both. The left one (resistor placed before - Suggested by LED series/parallel array wizard) still says 9.31v is flowing into the first LED, and the right one (resistor placed after the chain) says 12v is flowing into the first LED.
Wouldn't both burn out the LEDs as they are only meant to have 3.3v? Or am I massively misunderstanding all this?
Thanks in advance.
Edit: I was told to edit my post to explain how my question differs from another. The reason for that is I know very little at this point, and I didn't understand a word of the other question. It helps me to understand by wording it in a way I understand. I can then translate my own understanding based on the answers I receive. Thanks