I've been bread-boarding a
laser beam interrupt trigger for an electronic flash.
The receiver is a BPW34.
Two problems:
The receiver area is only 4mm x 4mm,
making targeting difficult with wobbly lash-up gear.
And, the chip's legs don't quite hold firmly in the BB.
So, I used a piece of “write-on” sticky tape.
Interesting internal reflection properties!
The tape “glows”, and the target area is now
around 10mm x 10mm.
Tried it at ~ 2 metres from a cheap laser pointer.
A fast moving 3mm wire triggers the flash.
e
Tape was:
http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Service-Aids/Adhesive-Tapes/Matt-clear-adhesive-tape/60218/kw/34-3184
but I'm sure that there are lots of others.
laser beam interrupt trigger for an electronic flash.
The receiver is a BPW34.
Two problems:
The receiver area is only 4mm x 4mm,
making targeting difficult with wobbly lash-up gear.
And, the chip's legs don't quite hold firmly in the BB.
So, I used a piece of “write-on” sticky tape.
Interesting internal reflection properties!
The tape “glows”, and the target area is now
around 10mm x 10mm.
Tried it at ~ 2 metres from a cheap laser pointer.
A fast moving 3mm wire triggers the flash.
e
Tape was:
http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Service-Aids/Adhesive-Tapes/Matt-clear-adhesive-tape/60218/kw/34-3184
but I'm sure that there are lots of others.
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