Understanding unexpected amp draw.
I have a 12v accessory plug socket that has a light on it and I was curious how much keeping it plugged in would affect my battery. (everything I read said it wasn't an issue, but curiosity sent me ch...
Forum Discussion
Matt_Colie wrote:
OK Wampthing,
You got answers. You got good answers on the first try.
Now, My Question for You.
Did you understand the answers?? (You are allowed to say "no".)
If you did that is great.
These little power converters are not a simple device. If you think of it as a transformer for DC (with bad efficiency) you will have a closer idea what it is. If you were to crack that USB charger with read out open, you would be amazed as all the miniature stuff that they crammed in there.
Matt
Yes, The answer makes total sense. Knowing USB is 5v, the math makes sense (in hind sight).
That being said, I have a lot more goofing around with the system before I am anywhere close to confident. Its like when a math teacher shows you what you did wrong with one problem, and you understand it enough to move on and get the next question wrong. :)
Always learning.
