it looks like the 555 timer sets the time base for voltage "stepup
coil". Some call this thing a kickback regulator. The cool thing about
those is the same circuit can develop any voltage either above or below
the supply voltage. it looks like trigger timing is adjustable, but no
mention of
Fella last week posted the links to some DIY stuff, I looked em all over.
One (IIRC) ran on 12v and had an adjustable frequency. Didja guys see that?
I haven't priced a commercial unit but this one looked very do-able. I read
the description and schematic, but that was 'then'. It has a 555 timer
Try this link for strobes
http://www.florapse.com/Merchant2/merchant.mvc?Screen=PROD_Code=STARSK244P1_Code=STROBEKIT_Count=4
--
Eric Pitts
Terre Haute Ind.
http://eric.pitts.mystarband.net
<>
I was referring to a technique that was once used for a strobe light for a
locator in a space mission (I think that was for aapproaching a satellite
with the space shuttle, or something to that extent). They needed to
maximize the range, and they could not increase the
Not so when charging a cap to oh say 400 or 500 volts from a 12v power
supply through a transformer being switched by a transistor. Charge
time then depends on the current capacity of the transistor, inductor &
rectifier, etc. (assuming no other current controlling factors are
present)..
Ever
What aluminum golf ball technique?
jg
On Tue, 2008-10-28 at 01:31 +1100, Aviation Interests wrote:
> I would have liked to find a Fresnel lens
> to improve further, then I heard of the "aluminum golf ball" technique, but
> I never found time to try that.
>
> Serge Vidal
> Melbourne, Australia
On the KR I owned in South Africa, I did just that: used house alarm
strobes, which are extremely cheap and easy to find. The same strobes are
also used on industrial machinery as an indicator of the machine condition.
The ones I used had a perfect flash rate (1Hz, that is 1 flash per second).
I
at gets gated when you snap the picture. An automatic trigger would have to
> be implemented.
>
> Sent via BlackBerry by AT
>
> -Original Message-
> From: John Gotschall <johng...@comcast.net>
>
> Date: Mon, 27 Oct 2008 06:52:25
> To: KRnet<kr...@myli
krnet@list.krnet.org
Date: Mon, 27 Oct 2008 06:52:25
To: KRnet<kr...@mylist.net>
Subject: Re: KR> camera strobes
Changing the flash rate may not be easy. often the flash rate is
simply the amount of time it takes to charge the capacitor. If you
reduce the capacitor size, i
I realize this is an effort to save money, but trying to reinvent the wheel
(strobe) is a lot of effort. If you want strobes and cheap ones, go to hide
away strobes for police and fire. They are cheap, 12 volt and light weight.
Problem solved!
**Play online games for FREE at
Changing the flash rate may not be easy. often the flash rate is
simply the amount of time it takes to charge the capacitor. If you
reduce the capacitor size, it will speed up but then there is less
energy available for the flash. Changing the charge current (to charge
the existing capacitor
I remember hearing about the camera strobe a few years ago and I had done some
testing of my own on another type of strobe. I had taken a fire alarm system
out of a building and it had stand alone strobes that were wall mounted
(simplex was the brand) they operated on 12 v and were self
12 matches
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