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Subject: Photo Flash Trigger Circuit Help
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Wed, 13 Nov 2002 21:48:00 -0500
NNTP-Posting-Date: Wed, 13 Nov 2002 21:48:46 EST
Organization: Cogeco Cable
Hello everyone, newbie here.
I am photographer with a keen interest in electronics and I have a design
question I was hoping someone could help with.
I recently purchased a new (to me) strobe system but was dismayed to find
that the trigger voltage was 98 volts DC. In the interest of safety, and
longevity of my equipment I devised a circuit that would trigger the strobes
but only put 10 volts DC across my camera sync contacts. The circuit can be
found here: http://home.cogeco.ca/~camera911/trigger/trigger.jpg The two
black dots in the center of the graphic are the points that I connect to my
camera. Also I was thinking putting a .1uf capacitor across the 98V to
filter out any AC.
I mocked up the circuit on a breadboard and it actually works most of the
time but every once and a while it fails to trigger the strobes. Can anyone
suggest what I might do to improve reliability?
Thank you for your time.
Please respond to camera911 at cogeco dot ca
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