Help with simple power circuit
Basically there are 6-7 Lasers that draw 3V at 250-300mA.
The most practical power supply I could think of is a 5V 2.1A iPad power adapter, with a usb cable with the leads exposed.
I forgot the basics of electronics... What positioning of what rated resistors are to be used?
Did I make a mistake in the basic setup?
THANKS SO MUCH FOR YOUR HELP
**EDIT: I suppose I should clarify. These 'lasers' are actually fully built with the drivers inside. Specifically they are those cheapie 5mw green pens.