Hi,

I built a test bed using the Extreme Robots how to make a featherweight video, originally the electronics were to the video’s specs, I’m currently adding the fuse holder, and LED so it complies to the build rules. At present I’m using the batteries that came with the drills (https://www.diy.com/departments/b-q-.../173942_BQ.prd), using the LED wizard that overkill suggested, I found the LED I chose (a 12v maplin chrome bezel yellow led) needed a 560ohm resistor.

It may sound like a daft question, but if I was supplying the source voltage of the battery (12v) would the resistor be needed?

Many thanks,

Sam