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LEDs don't flicker when fed with clean, filtered DC. The light fixture in my bedroom has three LED bulbs under the ceiling fan and they don't flicker under normal usage. Just before they fail, I have

Many years ago when I was a 'lecky, I worked on a very expensive lathe light fitting that was using fluorescent tubes. I was amazed that a lathe actually had a fluorescent fitting because of strobe

Since fluorescents fire on every half cycle, the Niagra ones would have had a 50 Hz flicker. Many people can see that. British and other countries have a 100 Hz flicker, supposedly not visible. US and

The LED itself, looking at the actual part, puts out a monochromatic light (with the exception of the blue/violet/UV/white which is essentially UV exciting a phosphor). The on/off ratio of a pulsed

Jim, check that you aren't subscribed twice, for example once by the auto-migration and once manually. Next pair of messages you get, check whether they're sent to the same email address. If not,

Some car brake lights have a slow partial-dimming-strobe effect where the frequency increases as the braking force increases to signal that to others.

I have a very short persistence of vision. Back in the early '70s, I was a Broadcast Engineer. I could see the single frames used to mark the location to splice in commercials on 16mm film. That was

But "sampler diodes" are not tunnel diodes?

I have both LED and CF lamps here. I can see some strobing from the CF but none from the LEDs. Perhaps they use a high frequency. There are different types, for instance some cars have LED brake and

I've bought some cheap led lamps (1w) for use as night lights on the landings, they actually provide useful normal levels but they do "strobe". This is only apparent when you move your hand close to

Ed, (Sorry, careful searching for Ed’s actual email address revealed nothing.) I know someone who is very strongly opposed to LED lamps of all kinds (also to halogen lamps). She is certain that LED

No double messages here. I use reflected e-mail for the list.

Hello James, The list owner, me, has no idea either. But since no one else is reporting this problem, or if they have it they haven't said anything, I would look inward at your computer and/or your

Hi to All, I was wondering if someone can give me some help in finding the problem on my SG5010 with error code 320, sine wave oscillator error. I would like to troubleshoot it and fix it. I would

I think I have a problem withthe delayed sweep on my 2465. I get the INTENsified mode when I pull out the sweep knob, I can adjust the position of the INTENsified area anywhere on the waveform. When I

It isn't the phone.? I'm using a Samsung Galaxy and not getting duplicate messages. Could be an ISP issue or mail client issue.? --Eric Sent from my Samsung Galaxy smartphone.

My bad it was a glaxay droid not an Iphone ..still do you get double messages both places?

Jim I notice the signature shows you are using a Iphone for email. If you read your group messages on a "real" computer. Do you still get doubles? I see all kinds of anomalies on the wife's Iphone

We have piezo movers for tiny motions now at easy prices, so maybe a dipping or Czochralsky pulling process could be automated easier, but working with glowing hot melt is not easy DIY. (I've done

Jim, I have no idea, but if the list owner has not replied to you, I suggest an email direct to him: (See links below) Roy Morgan k1lky68@... <mailto:k1lky68@...>