DIY Simple Green Laser Projector

First, you will need a green laser anything 125 mW and above.You also need a diffractive glass that will distribute the green laser beams.You could probably use those cheap diffractive glasses from 3D glasses too.

Laser Link Communicator

There's something rather futuristic about talking 'over' a laser beam, which is what this inexpensive project allows. It will easily give a communication distance of several hundred metres, and with a parabolic light reflector, up to several kilometres. It transmits high quality audio and the link is virtually impossible for anyone else to tap into.

Laser Pointer - Across and Along The Track Detection

This train detector makes use of hand held laser pointer devices that are widely available to detect trains over long distances.

10mhz to 20mhz laser light detector

This circuit was originally designed to detect laser light pulses for an optical Ethernet communications system. It has good ambient light immunity.

10 MHz to 20 MHz laser light detector

circuit was originally designed to detect laser light pulses for an optical Ethernet communications system, good ambient light immunity

20 MHz VCSEL 3 mW laser test circuit

this circuit shows how to drive the laser device from a single high speed CMOS IC, circuit takes advantage of some new vertical cavity surface emitting lasers (VCSEL) that dont require light output control circuits

20mhz vcsel 3mw laser test circuit

This circuit takes advantage of some new vertical cavity surface emitting lasers (VCSEL) that do not require light output control circuits. The circuit shows how to drive the device from a single high speed CMOS IC.

AM laser diode modulation

Amateur Laser Construction

convert a conventional laser pointer to a modulated laser