Power for 12 LED? Answered
I want to make something and decorated with LED lighting for my girlfriend's birthday present.
I will need to light up 12 LED, which has typical forward voltage around 3.5V, and I wonder what is minimum number of batteries (AA/AAA) I need to use and will still give a reasonable brightness please?
Can it be less than 3 batteries? As it doesn't really make sense to have a lot of batteries in a small present.
Thank you very much