Selfrunning cold electricity circuit from Dr.Stiffler

[Mr.Entropy]

The human eye detects peak light levels. There are cells in the eye that trigger when light above a specific level hits them. These cells send a message to the brain saying that there is a light in a certain location. It takes time for these cells to reset. If after some time has past and they have reset and they are again triggered and send another signal to the brain, the brain assumes that the light was on continuously the full time between signals.

I do not believe this is true for the MHz frequencies being used by people in this thread.Ã,  It is certainly not true for the video cameras being used to capture the videos that we see posted on youtube (unless you synchronize the LED to the video frames), so we observers can at least be certain that we are not seeing any odd duty cycle effects.

Cheers,

Mr. Entropy

[xee]

@ hoptoad,
The point was that LEDs sometimes look like they are consuming more power than they actually are. Therefore your suggestions might not always work.

[hoptoad]

@ hoptoad,
The point was that LEDs sometimes look like they are consuming more power than they actually are. Therefore your suggestions might not always work.

"Therefore your suggestions might not always work."

That wouldn't be the first time, nor the last I suspect!  LOL     LOL    KneeDeep

Cheers XEE

[xee]

@ Mr.Entropy.
You could be correct. I do not wish to start argument. But video camera CCD responseds very similar to human eye. It records peak level of light on pixel during each frame (about 1/30 second), the CCD does not record how often that level was reached during the frame.

[xee]

@Mr.Entropy,
Sorry, I do not know much about CCDs so I should not have said anything about them. I only wanted to point out that sometimes it is hard to tell how much power an LED is using just by looking at it.