What's up with Amps, voltage and current?
So say my LED and 9v battery. I know I need to use a 150 ohm resistor. Since resistors limit current, then is there still 9v going to my LED its just the amps/current that being lowered before going into the LED?
If resistors limit current, or in its unit of measure, amps, then my LED is still getting the supplied voltage just a lowered amperage?
How do I know how many amps my projects are drawing? How will I know if my DC wall transformer with 12vDC and 1 ma isn't going to fry my circuit? How would I know if 1 amp is too much or not enough for any my circuit?
Please help, none of this makes sense,