Strobe Lights.

Guest
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin
 
On Sun, 8 Feb 2009 18:06:41 -0600, cuhulin@webtv.net wrote:

I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin
Click to expand...
The "flickering" is what makes the blades appear to stop. If the
light flashes when the blades are in exactly the same position they
were in the previous time the light flashed, you will not perceive
that the blades are turning.

This can be a safety hazard when machinery running at certain speeds
is illuminated by fluorescent lights - the on and off of the
fluorescent bulb with every cycle of the AC voltage can make the
machinery appear to be stopped (yes, I know it's a simplified
explanation).

John
 
On 2/8/2009 4:06 PM cuhulin@webtv.net spake thus:

I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
Click to expand...
Sure: how fast can you blink your eyes?


--
Personally, I like Vista, but I probably won't use it. I like it
because it generates considerable business for me in consulting and
upgrades. As long as there is hardware and software out there that
doesn't work, I stay in business. Incidentally, my company motto is
"If this stuff worked, you wouldn't need me".

- lifted from sci.electronics.repair
 
cuhulin@webtv.net wrote:

I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

Spin yourself at the same speed as the fan.
Click to expand...

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.
 
cuhulin@webtv.net wrote:
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

It just occurred to me that the strobe lights and circuits take a
Click to expand...
finite amount of time to charge ! and discharge very quickly to give the
flashing strobe effect.

It also occurred to me that superbrite white LED's should fire very
quickly so by using a 555 timer and an appropriate driver would give you
a quick strobe ! Without that recharging delay !!

I will have to try this on my testbench soon !

Yukio YANO
 
On 2/8/2009 7:44 PM Yukio YANO spake thus:

cuhulin@webtv.net wrote:

I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?

It just occurred to me that the strobe lights and circuits take a
finite amount of time to charge ! and discharge very quickly to give the
flashing strobe effect.

It also occurred to me that superbrite white LED's should fire very
quickly so by using a 555 timer and an appropriate driver would give you
a quick strobe ! Without that recharging delay !!

I will have to try this on my testbench soon !
Click to expand...
Could work, would be interesting, but wouldn't be able to touch a xenon
tube for brightness.


--
Personally, I like Vista, but I probably won't use it. I like it
because it generates considerable business for me in consulting and
upgrades. As long as there is hardware and software out there that
doesn't work, I stay in business. Incidentally, my company motto is
"If this stuff worked, you wouldn't need me".

- lifted from sci.electronics.repair
 
In article <%ENjl.6483$j27.474@newsfe04.iad>, Yukio YANO <yano@shaw.ca> wrote:
cuhulin@webtv.net wrote:
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

It just occurred to me that the strobe lights and circuits take a
finite amount of time to charge ! and discharge very quickly to give the
flashing strobe effect.

It also occurred to me that superbrite white LED's should fire very
quickly so by using a 555 timer and an appropriate driver would give you
a quick strobe ! Without that recharging delay !!

I will have to try this on my testbench soon !
Click to expand...
Nothing new. You can pulse to the LED's peak rating. The longer the pulse the brighter it
appears.

You could also use LCD glasses to view the fan.


greg
 
On Sun, 8 Feb 2009 18:06:41 -0600, cuhulin@webtv.net wrote:

I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin
Click to expand...
Turn off the fan. The blades will be clearly stopped.
 
I work on and do tune ups on my own vehicles.I know about using an auto
strobe/timing light.

When I was watching that How It's Made tv program, I figured it would be
''cute'' if the rotating fan blade on my old antique electric table fan
could appear to stop rotating.That is what the How It's Made program
showed on tv.I still think it is a ''cute'' idea though.
cuhulin
 
In article <1953-499050FD-3544@storefull-3172.bay.webtv.net>, cuhulin@webtv.net wrote:
I work on and do tune ups on my own vehicles.I know about using an auto
strobe/timing light.

When I was watching that How It's Made tv program, I figured it would be
''cute'' if the rotating fan blade on my old antique electric table fan
could appear to stop rotating.That is what the How It's Made program
showed on tv.I still think it is a ''cute'' idea though.
cuhulin
Click to expand...
Just keep it away from kids.

greg
 
I like those Western movies, when the wagon wheels look like they are
running backwards.
cuhulin
 
On 2/9/2009 1:10 PM cuhulin@webtv.net spake thus:

I like those Western movies, when the wagon wheels look like they are
running backwards.
Click to expand...
They were. Didn't you know they shot all action scenes backwards back then?

You can imagine how hard it was for all them actors to learn to talk
backwards.


--
Personally, I like Vista, but I probably won't use it. I like it
because it generates considerable business for me in consulting and
upgrades. As long as there is hardware and software out there that
doesn't work, I stay in business. Incidentally, my company motto is
"If this stuff worked, you wouldn't need me".

- lifted from sci.electronics.repair
 
On Sun, 08 Feb 2009 21:44:46 -0600, Yukio YANO <yano@shaw.ca> put
finger to keyboard and composed:

cuhulin@webtv.net wrote:
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

It just occurred to me that the strobe lights and circuits take a
finite amount of time to charge ! and discharge very quickly to give the
flashing strobe effect.

It also occurred to me that superbrite white LED's should fire very
quickly so by using a 555 timer and an appropriate driver would give you
a quick strobe ! Without that recharging delay !!

I will have to try this on my testbench soon !

Yukio YANO
Click to expand...
I have a Ministrobe kit designed by Electronics Australia in August
1997. It uses exactly those components.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
<cuhulin@webtv.net> wrote in message
news:29508-498F7391-1110@storefull-3171.bay.webtv.net...
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

Sure. Turn the fan off.
Click to expand...
 
In article <PzEkl.11045$Db2.3177@edtnps83>, "Dave" <dspear99ca@yahoo.com> wrote:
cuhulin@webtv.net> wrote in message
news:29508-498F7391-1110@storefull-3171.bay.webtv.net...
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

Sure. Turn the fan off.
Click to expand...

Grab it.
 
It is 70 degrees outside right now.The old antique Hunter electric fan
on the end table by doggy's end of her couch is running.
cuhulin
 
GregS wrote:
In article <PzEkl.11045$Db2.3177@edtnps83>, "Dave" <dspear99ca@yahoo.com> wrote:
cuhulin@webtv.net> wrote in message
news:29508-498F7391-1110@storefull-3171.bay.webtv.net...
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

Sure. Turn the fan off.


Grab it.

Stick your nose in it....
Click to expand...

jak
 
cuhulin@webtv.net wrote:
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin

We used to have a tuning fork with a peep hole between the forks to time
Click to expand...
teletype motors. You tap the fork and look through the peep hole and the
dots on the teletype motor would stop when the right speed was set.

So yes, you can use tuning forks or an electronic vibrator with a peep site.



--
<<//--------------------\\>>
Van Chocstraw
>>\\--------------------//<<
 
Van Chocstraw wrote:
cuhulin@webtv.net wrote:
I am watching How It's Made on the SCI channel.The tv program guy said a
strobe light can be ajusted to make it appear a moving fan blade has
stopped.Is there another way to do that without the flickering of using
a strobe light?
cuhulin
We used to have a tuning fork with a peep hole between the forks to time
teletype motors. You tap the fork and look through the peep hole and the
dots on the teletype motor would stop when the right speed was set.

So yes, you can use tuning forks or an electronic vibrator with a peep
site.
Click to expand...
Way way back when I repaired washing machines for a living, Hotpoint
supplied a cardboard disk which fitted over the centre nut of the drum
pulley, The disk had a ring of dots which appeared stationary under
incandescant light when the drum was turning at the correct distribute
speed - which was critical.

Ron
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top