Fiber Optic Trigger Lead for DRSSTC's
Date: Mon, 06 Feb 2006 16:14:09 -0700
From: Tesla list <tesla@pupman.com>
To: tesla@pupman.com
Subject: Working: A fiber optic trigger lead for (DR)SSTC`s
Original poster: Finn Hammer <f-h@c.dk>
All,
I can now verify, that it is possible and easy to make a fiber optic trigger
connection to any SSTC. I just completed one for myself, starting out with a
transmitter driven from a 555 trigger generator: The transmitting LED is driven
btwn pin3 and ground of the 555, with a 680ohm resistor to set the current.
http://home5.inet.tele.dk/f-hammer/fibergut.jpg
Nothing fancy, the transmitter is at the top of the box. Bypass caps below
board.
Closed, the box looks like this:
http://home5.inet.tele.dk/f-hammer/fiberbox.jpg
The receiver is active low, so I had to reverse it. At first I used a
comparator, LM311 and it worked well on the breadboard, but I thought it better
to have some hysteresis, the more the merrier. Since I could not find any
schmitt triggers in an 8DIP housing, I wired the 555 as a schmitt:
http://home5.inet.tele.dk/f-hammer/donglesch.jpeg
I wanted the whole circuitry to fit into a 9pin Dsub shell, so I needed the 8pin
package. 15V is already available in the socket, Since I use Stephen Conners
PLL drivers, still not a lot of space left:
http://home5.inet.tele.dk/f-hammer/dongle.jpg
It all plays very well, here is a short video of one of my DRSSTC`s driven by
the combo on each end of 100 feet of fiber:
http://home5.inet.tele.dk/f-hammer/fibertrigged.wmv
You guys remember how good it felt to make your first working electronic
project? Then you know how I feel now. I feel pretty damn good!
Cheers, Finn Hammer
Date: Mon, 06 Feb 2006 16:22:37 -0700
From: Tesla list <tesla@pupman.com>
To: tesla@pupman.com
Subject: Re: Working: A fiber optic trigger lead for (DR)SSTC`s
Original poster: Vardan
<vardan01@twfpowerelectronics.com>
Very nice Finn!! Thanks for providing the details!!
Cheers, Terry
At 10:56 AM 2/6/2006, you wrote:
>All,
>
>I can now verify, that it is possible and easy to
make a fiber optic
>trigger connection to any SSTC. I just completed
one for myself,
>starting out with a transmitter driven from a 555
trigger generator:
>The transmitting LED is driven btwn pin3 and
ground of the 555, with
>a 680ohm resistor to set the current.
>http://home5.inet.tele.dk/f-hammer/fibergut.jpg
>Nothing fancy, the transmitter is at the top of
the box. Bypasscaps below board.
>Closed, the box looks like this:
>http://home5.inet.tele.dk/f-hammer/fiberbox.jpg
>The receiver is active low, so I had to reverse
it. At first I used
>a comparator, LM311 and it worked well on the
breadboard, but I
>thought it better to have some hysteresis, the
more tha merrier.
>Since I could not find any schmitt triggers in an
8DIP housing, I
>wired the 555 as a schmitt:
>http://home5.inet.tele.dk/f-hammer/donglesch.jpeg
>
>I wanted the whole circuitry to fit into a 9pin
Dsub shell, so I
>needed the 8pin package.
>15V is already available in the socket, Since I
use Stephen Conners
>PLL drivers, still not a lot of space left:
>http://home5.inet.tele.dk/f-hammer/dongle.jpg
>It all plays very well, here is a short video of
one of my DRSSTC`s
>driven by the combo on each end of 100 feet of
fiber:
>http://home5.inet.tele.dk/f-hammer/fibertrigged.wmv
>
>You guys remember how good it felt to make your
first working
>electronic project? Then you know how I feel now.
I feel pretty damn good!
>
>Cheers, Finn Hammer
>
Date: Mon, 06 Feb 2006 19:40:12 -0700
From: Tesla list <tesla@pupman.com>
To: tesla@pupman.com
Subject: Re: Working: A fiber optic trigger lead for (DR)SSTC`s
Original poster: Steve Conner <steve@scopeboy.com>
Hi Finn, all,
That's great that you got a cheap fibre optic link to work. And 100 feet is an
amazing range, almost a safe distance for Ward's next DRSSTC ;)
If you're building more of them, you can wire my PLL driver to accept an active
low trigger input and do away with the 555, which might make your dongle a bit
less cramped. On the 9-way D input socket, instead of grounding pin 3 and
driving the signal into pin 2: Connect pin 2 to the +15v supply (on pin 5) and
drive the signal into pin 3.
Steve Conner
http://www.scopeboy.com/
>>I can now verify, that it is possible and easy
to make a fiber
>>optic trigger connection to any SSTC. I just
completed one for
>>myself, starting out with a transmitter driven
from a 555 trigger generator:
>>The transmitting LED is driven btwn pin3 and
ground of the 555,
>>with a 680ohm resistor to set the current.
>>http://home5.inet.tele.dk/f-hammer/fibergut.jpg
>>Nothing fancy, the transmitter is at the top of
the box. Bypasscaps
>>below board.
>>Closed, the box looks like this:
>>http://home5.inet.tele.dk/f-hammer/fiberbox.jpg
>>The receiver is active low, so I had to reverse
it. At first I used
>>a comparator, LM311 and it worked well on the
breadboard, but I
>>thought it better to have some hysteresis, the
more tha merrier.
>>Since I could not find any schmitt triggers in
an 8DIP housing, I
>>wired the 555 as a schmitt:
>>http://home5.inet.tele.dk/f-hammer/donglesch.jpeg
>>
>>I wanted the whole circuitry to fit into a 9pin
Dsub shell, so I
>>needed the 8pin package.
>>15V is already available in the socket, Since I
use Stephen Conners
>>PLL drivers, still not a lot of space left:
>>http://home5.inet.tele.dk/f-hammer/dongle.jpg
>>It all plays very well, here is a short video of
one of my DRSSTC`s
>>driven by the combo on each end of 100 feet of
fiber:
>>http://home5.inet.tele.dk/f-hammer/fibertrigged.wmv
>>
>>You guys remember how good it felt to make your
first working
>>electronic project? Then you know how I feel
now. I feel pretty damn good!
>>
>>Cheers, Finn Hammer