So you connect pin 12 to ground and set it to high?
Measured between positive on voltage regulator and ground on board, with voltage regulator connected to pin 12 and GND of course, I'm not _that_ stupid
The laser doesn't really "draw" current.
If it was easy, would it be any fun?
Exactly. The last two days of tinkering, reading, failing, reading, asking, tinkering and eventually having a bit of success have been some of the most educative and fun in a while
When I started this project my electronic knowledge was limited to building mobile soundsystems, so moving into this realm has definitely been a new and exciting world for me.
What I'm hoping to build in the end is a XY laser scanner controlled from a programmable MIDI controller (via a computer). It's quite a "daunting" project for someone as green in electronics as I am, but hey, no challenge no fun.
I ended up going with a NPN transistor and two voltage regulators, going from 12V to 5V to 3V, since that was what I had on hand
The high current 3V is then controlled with the NPN transistor from a digital pin on the board. I've currently got one stepper motor (hooked up through an Adafruit Motor Shield) controlling a mirror, which the laser is reflected through.
Here's a few photos: