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Working: A fiber optic trigger lead for (DR)SSTC`s
Original poster: Finn Hammer <f-h@xxxx>
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.
Nothing fancy, the transmitter is at the top of the box. Bypasscaps
Closed, the box looks like this:
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:
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:
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:
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