DIY Laser Projector using a Pringles can, a small fan and 4 laser diodes.
I have spent aroung € 10.- If you want to build your own you will need:
- Pringles Can (Small)
- Laser Diodes x 5 € 2.-
- 12 to 5v aconverter for the laser diodes € 4.-
- 12V Fan € 1.50.-
- 12V Dimmer € 2.50.-
- Small rubber bands
- 12V Power adapter