The two items below will allow you to transmit voice signals over a laser light beam.  These electronic kits are suitable for novice/intermediate kit builders and contain less than 20 parts each.

Audio Modulation Kit- This simple electronic kit includes parts and instructions for sending audio signals over a beam of light.  It works with all helium-neon lasers and connects to the cathode side of the laser tube. We recommend our Helium-Neon Laser Module, but any helium-neon laser will do. Audio is input through an isolated 8 ohm input.  This kit requires some electronic soldering.
Item #: AMK $9.95 (requires audio amplifier, i.e. old stereo, boom box, Walkman, etc.)
Item #: AMK2 $44.50 (includes microphone kit, does not require audio amplifier, requires 9V battery.)

Audio Light Receiver Kit- Use this light receiver to de-modulate a modulated laser signal.  Talk to your friends across the street over a secure light channel. Make a “laser bounce” listener system. Even de-modulate light from non-laser sources such as the buzz of light reflected off of an insects wings or the buzz of a TV monitor raster scan. Great science fair project! Includes all parts, P.C. board, and instructions.  Features adjustable gain and on/off switch. Requires 9V battery.
Item #: LR2  $34.95

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