P
Pimpom
- Jan 1, 1970
- 0
A couple of weeks ago, I posted a question in s.e.b. about
sending a trigger pulse over some hundreds of metres. I apologise
for not responding to each reply. The reasons were social
obligations of the season and the death of my mother-in-law.
I'd previously rejected the idea of sending the pulses by IR, but
suggestions in seb made me consider it again. I've thought of
some techniques to extend the range and preliminary calculations
indicate that it's doable.
I've already been using IR links for other purposes over
distances of ~10m, but while experimenting to see how much
distance I can get without any special technique, I ran across an
unexpected snag: I found that the no-name IR LEDs from the local
market focus their beams in directions way off the LED axis.
So I've been looking for sources where I can get specific models
of IR LEDs with datasheets. I've tentatively selected the Vishay
TSAL6100 with a half-power beam width of 10 degrees, but it will
take at least 2 or 3 weeks for me to get the devices. Does anyone
here know if such branded LEDs can be relied on to project their
beams accurately along their axes?
sending a trigger pulse over some hundreds of metres. I apologise
for not responding to each reply. The reasons were social
obligations of the season and the death of my mother-in-law.
I'd previously rejected the idea of sending the pulses by IR, but
suggestions in seb made me consider it again. I've thought of
some techniques to extend the range and preliminary calculations
indicate that it's doable.
I've already been using IR links for other purposes over
distances of ~10m, but while experimenting to see how much
distance I can get without any special technique, I ran across an
unexpected snag: I found that the no-name IR LEDs from the local
market focus their beams in directions way off the LED axis.
So I've been looking for sources where I can get specific models
of IR LEDs with datasheets. I've tentatively selected the Vishay
TSAL6100 with a half-power beam width of 10 degrees, but it will
take at least 2 or 3 weeks for me to get the devices. Does anyone
here know if such branded LEDs can be relied on to project their
beams accurately along their axes?