I'm trying to build a POV display with ~10 LEDs mounted verticaly at one end.
I am using a hacked CD-ROM brushless motor. I am using the circuit on the cd drive to manually start and stop the motor. The motor has a small ribbon cable that goes into a socket on the pcb of the cd drive.
The ribbong cable is small. So I have created a contraption that allows me to put stuff on the motor while keeping it close to the pcb.
I'm using some of the assembly of the CD drive, so there is lot of unnecessary stuff I haven't bothered to remove.
Here are a few pictures, I have added some comments to make things clear (forgive my paint skills)
As you can see, this provides me with a very good way of mounting cds and cd-like things. At first my idea was to build everything on a DVD and use some home-made brushes to power my circuit. The motor head has a metallic center connected to the bell of the motor. So I use one brush (brush 1) placed against the bell of the motor and some aluminium foil on the dvd to make contact with motor head.
For second brush (brush 2), I placed some aluminium foil under the disc. So brush 2 runs against alumnium foil as the disc rotates. The problem here is that within 5 minutes, the brush scores the foil so much that the foil gets cut.
Another thing I tried was to tape 9V battery to the center of the motor head (to keep the center of mass at the rotating axis), just to test how it would behave.
As I raised the motor's speed to somewhere around 3k rpm, it vibrates fiercly and the whole thing flies off the motor.
Even if I do ditch the DVD/CD and use wood or metal as my base material, I still don't see a way of putting a battery on the moving platform without bad stuff happening.
