LED dance - Road Star Warrior Forum : Yamaha Star Warrior Forums

TECK · 06-24-2012, 08:24 PM

The rear LED's are freaking out on an iPhone camera, they don't do this IRL.

LED dance - YouTube

dnowlan · 06-24-2012, 08:43 PM

Technically they are blinking, just at a rate your eyes aren't seeing but your iPhone can. Point your iPhone at a TV and you'll also capture the refresh rate of the TV as well.

Sent from my A500

TECK · 06-24-2012, 09:36 PM

Wow, did not know the LED's are blinking? I thought they are just diodes that receive static current through.

Ama · 06-24-2012, 11:27 PM

what kinda bike does your buddy have floren?

TECK · 06-25-2012, 01:27 PM

Custom built from scratch, with a 330 rear end.

limotinted · 06-25-2012, 01:33 PM

I was expecting this from the title

jeep dance - YouTube

MikeOlmt · 06-25-2012, 02:33 PM

It's due to the fact that the only real way to dim an LED is to flash it at .... say 60hz (times per second).. then control how many of those 60pulses are on vs off. It's called duty cycle. For dim or running lights they are prolly on 50%, then 100% on for brake. this translates to a visible flash when video recording devices which record at 30 frames per second catch the LED in it's off state every few frames or so.

it's exactly what he was talking about when you point your phone cam at a tv and get the same result. the refresh rates are out of sync. Same on TV news.. when they look at a monitor, it's flashing..

In the movies they control the monitors so it does sync up with the film (which btw, is 24fps) so it all looks gravy!!!

Ama · 06-25-2012, 02:35 PM

Quote:

Originally Posted by TECK

Custom built from scratch, with a 330 rear end.

wow, crazy

wyomingwarrior · 06-25-2012, 05:34 PM

Quote:

Originally Posted by limotinted

i was expecting this from the title
jeep dance - youtube

lmfao!!!!

06-24-2012, 09:36 PM	#3 (permalink)
TECK Senior Member Join Date: Jul 2008 Location: Montreal, Canada Posts: 1,801	Wow, did not know the LED's are blinking? I thought they are just diodes that receive static current through. __________________ Night Demon - Warrior of the Year Winner - Completed Mods First official ride with the Demon - Another relax ride Friends call me Floren, join the Roadstar Warriors group on Facebook "If you are not sure, just open the throttle"

06-25-2012, 01:27 PM	#5 (permalink)
TECK Senior Member Join Date: Jul 2008 Location: Montreal, Canada Posts: 1,801	Custom built from scratch, with a 330 rear end. __________________ Night Demon - Warrior of the Year Winner - Completed Mods First official ride with the Demon - Another relax ride Friends call me Floren, join the Roadstar Warriors group on Facebook "If you are not sure, just open the throttle"

06-24-2012, 08:43 PM	#2 (permalink)
dnowlan Senior Member Join Date: Aug 2011 Location: Massachusetts Posts: 123	Technically they are blinking, just at a rate your eyes aren't seeing but your iPhone can. Point your iPhone at a TV and you'll also capture the refresh rate of the TV as well. Sent from my A500

06-24-2012, 11:27 PM	#4 (permalink)
Ama Senior Member Join Date: Jun 2011 Location: Buffalo, New York Posts: 2,575	what kinda bike does your buddy have floren?

06-25-2012, 02:33 PM	#7 (permalink)
MikeOlmt Senior Member Join Date: Feb 2011 Location: St Augustine, Florida Posts: 481	It's due to the fact that the only real way to dim an LED is to flash it at .... say 60hz (times per second).. then control how many of those 60pulses are on vs off. It's called duty cycle. For dim or running lights they are prolly on 50%, then 100% on for brake. this translates to a visible flash when video recording devices which record at 30 frames per second catch the LED in it's off state every few frames or so. it's exactly what he was talking about when you point your phone cam at a tv and get the same result. the refresh rates are out of sync. Same on TV news.. when they look at a monitor, it's flashing.. In the movies they control the monitors so it does sync up with the film (which btw, is 24fps) so it all looks gravy!!!

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