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laser_transceiver [2014/11/11 15:24]
cwh0009 [Photos]
laser_transceiver [2014/11/11 15:34] (current)
cwh0009 [Experiments/Demonstrations]
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 ====== Overview ====== ====== Overview ======
-The laser transceiver is a free space optical communication device that encodes audio on a laser beam using pulse width modulation (PWM). A single transmitter and receiver unit can be built for about $15-$20 in parts. We used to use this for a demonstration in ELEC 3030 (RF Systems Lab), but aligning the lasers took quite a bit of time to setup.+{{:​transmitter_1.jpg?​direct&​200 |}}The laser transceiver is a free space optical communication device that encodes audio on a laser beam using pulse width modulation (PWM). A single transmitter and receiver unit can be built for about $15-$20 in parts. We used to use this for a demonstration in ELEC 3030 (RF Systems Lab), but aligning the lasers took quite a bit of time to setup.
  
 ====== Design ======= ====== Design =======
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 {{:​transmitter_5.jpg?​direct&​400|}} {{:​transmitter_3.jpg?​direct&​400|}} {{:​transmitter_5.jpg?​direct&​400|}} {{:​transmitter_3.jpg?​direct&​400|}}
 ====== Experiments/​Demonstrations ====== ====== Experiments/​Demonstrations ======
 +  * Place a fan in between the transmitter and receiver, breaking the laser. The fan will generate a tone as it spins. 
 +  * Use the receiver to listen to light and see if anything else generates sound. Fluorescent lights should. 
 +  * Shake power or dust through the laser, or transmit through a stream of water. It should interrupt the audio.
laser_transceiver.1415741059.txt.gz · Last modified: 2014/11/11 15:24 by cwh0009