All posts in the 'Laser projects' Category
Posted on 20 Mar 2008
The basic idea of TinyProjector is to create the smallest possible character projector that can be either integrated into mobile device, or linked dynamically with wireless RF connections like serial low range transceivers.It used laser diodes salvaged from cheap key chain laser pointers.
A micro motor with a single swiveling servo arm, making a continuous full 360-degree rotation, drives the deflection mirror, resulting in a 38-degree left-right sweep. This leads to an unusually high overall laser projection angle of 104 degrees.[more]
Posted on 18 Mar 2008
Use two mirrors, two motors to move the mirrors, a laser pointer, and a PIC microcontroller with serial input to receive the image from the host computer and control the mirrors and laser. The image will be conditioned in and transferred by Processing. The result will be an image that looks a bit like a bit big POV or a red and black old style computer display.[more]
Posted on 08 Mar 2008
This is a simple description (some kind of engineering reversing :-)) of cheap KeyChain Lasers that are sold for 5 bucks or so.The laser diode head has three pins labeled: LDC (Laser Diode Cathode), PDA (Photo Diode Anode) and COM+ (common Positive Terminal).Inside the laser diode head we find the laser diode itself and a photodiode, used to regulate the laser diode current with an external feedback loop.[more]
