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Bert22306
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Characteristic curves?
Bert22306   1/24/2014 5:57:49 PM
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Wait. I thought you had replaced the rather staid and boring heaters with colorful LEDs, and were going to show us some fantastic impact of this on the characteristic curves of antique tubes. No? Or is it as I expected, that the cathode just isn't boiling off any electrons? Quel dommage!

Max The Magnificent
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Re: Characteristic curves?
Max The Magnificent   1/25/2014 4:55:27 PM
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@bert22306: Or is it as I expected, that the cathode just isn't boiling off any electrons? Quel dommage!

What a pity indeed -- but we are still at the beginning of the experiments -- someone suggested that the yellow hue to one of the tubes might signify that it would fluoresce if exposed to a UV LED (I didn't even know they made UV LEDs). For tubes with cathodes I expect to make them glow -- someone else suggested that one of the tubes might be some sort of rectifier that could be made to act a bit like a fluorescent tube ... lots to think about here...

DrFPGA
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Dr Who
DrFPGA   1/25/2014 12:04:31 AM
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I now know that when you were a bit younger you wanted to grow up to be the special effects guy on Dr Who..

Max The Magnificent
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Re: Dr Who
Max The Magnificent   1/25/2014 4:56:22 PM
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@DrFPGA: ...you wanted to grow up to be the special effects guy on Dr Who...

I really want to be Dr Who's traveling companion :-)

David Ashton
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LED Effects
David Ashton   1/25/2014 2:11:25 AM
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I like the effect more with the light bulb than with the tube Max.  Maybe because the tube structures are mostly in the same plane that the LEDs are shining, hence don't get much direct illumination?   I'm also sure that the pics/videos dont do them justice, I know these things are VERY difficult to photograph.

I love the rotation effect in the video, it looks too smooth to be discrete leds - how many LEDs are there?

Max The Magnificent
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Re: LED Effects
Max The Magnificent   1/25/2014 4:58:56 PM
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@David: I love the rotation effect in the video, it looks too smooth to be discrete leds - how many LEDs are there?

There were 13 LEDs in this case, because I was using the Adafruit NeoPixel strip with 60 LEDs per meter -- but I'm also going to try the 144 LEDs/Meter strip from Adafruit, which should give me about 30 LEDs around the base of the big tube!!!

Watch this space!!!

Susan Rambo
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Artistic
Susan Rambo   1/25/2014 10:25:24 AM
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Very creative, Max. You're having too much fun. You're the steampunk guy in the Hawaii shirt.

Garcia-Lasheras
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Re: Artistic
Garcia-Lasheras   1/25/2014 4:38:28 PM
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@Susan: "You're the steampunk guy in the Hawaii shirt"

I couldn't agree more: Max is our own "Dr. Who" ;-)

Max The Magnificent
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Re: Artistic
Max The Magnificent   1/25/2014 4:59:51 PM
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@Susan: You're having too much fun. You're the steampunk guy in the Hawaii shirt...

LOL



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