Super easy Fiber commucations
Peter KG6LSE
Posts: 1,383
I was In lab today completing my Fiber final and a light bulb LED came on( bad pun) .
" Hmmm this hole on this ST barrel Bulkhead connector looks just right for a LED .
" By gorge It Does fit !!
So I tinkered for a few hours after class and came up with this
Note the DPSS Green LASER TX is a few months old . I used it for free space LASER Comm to a Solar Cell RX with a BS2 sending "hello World CQ DX CQ DX " it goes almost a mile at 600 Baud ..
The Key point is how I used a LED in a Fiber ST connector to make a super cheap Fiber TX and RX
www.youtube.com/watch?v=ZEqQzKhlxRU
( will add a drawing soon )
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
" Hmmm this hole on this ST barrel Bulkhead connector looks just right for a LED .
" By gorge It Does fit !!
So I tinkered for a few hours after class and came up with this
Note the DPSS Green LASER TX is a few months old . I used it for free space LASER Comm to a Solar Cell RX with a BS2 sending "hello World CQ DX CQ DX " it goes almost a mile at 600 Baud ..
The Key point is how I used a LED in a Fiber ST connector to make a super cheap Fiber TX and RX
www.youtube.com/watch?v=ZEqQzKhlxRU
( will add a drawing soon )
Peter KG6LSE
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
Comments
That's awesome!
...waiting for the demo using LEDs... [noparse]:)[/noparse]
OBC
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New to the Propeller?
Visit the: The Propeller Pages @ Warranty Void.
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
OBC : the IR LED Demo was the first third of the video .
Attached is the circuits I used to make it work
Also attached is a photo of a LED in a Fiber ST barrel connector .
Note on the RX I put the LM386 on my own board and omitted the Shack Amp .(its the same guts )
And on the TX LASER version I use 2 1N400x diodes instead of a 220Ω resistor to drop the 5V to around 3.8V or so to run the laser pointer safely . Mind if your LASER is a regulated module that accepts 5V in you may not need all of the dropping diodes .
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
I CADed the Circuits I used on to a PCB .
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
I took the same circuit as in the first version and made a Full duplex bi directional point to point "Photo Phone" .
next week I am making a Full duplex bi directional point to point ST " Fibre phone ".
I am doing a upgrade too! I am using 10mW Red Lasers for the photo phone and some super bright IR LEDs for the Fibre Phone.
I hope to get a mile in the fibre phone this time ..
I did a test with some of the new IR LEDs and the matching receivers and got up to 115 K Buad over a 1000Foot span with lots of head room.
there are losses still that I need to kink out but its looking good for a LED vs Laser test .
the Price per mile is a whole lot less with the IR LEDs .
I have on order 1 mile of duplex Fibre coming in soon to do a long span test with the voice mode.
Peter KG6LSE
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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL
Post Edited (Peter KG6LSE) : 5/1/2010 2:07:12 PM GMT