Breaking News
Comments
Bert22306
User Rank
CEO
Characteristic curves?
Bert22306   1/24/2014 5:57:49 PM
NO RATINGS
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
User Rank
Blogger
Re: Characteristic curves?
Max The Magnificent   1/25/2014 4:55:27 PM
NO RATINGS
@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
User Rank
Blogger
Dr Who
DrFPGA   1/25/2014 12:04:31 AM
NO RATINGS
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
User Rank
Blogger
Re: Dr Who
Max The Magnificent   1/25/2014 4:56:22 PM
NO RATINGS
@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
User Rank
Blogger
LED Effects
David Ashton   1/25/2014 2:11:25 AM
NO RATINGS
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
User Rank
Blogger
Re: LED Effects
Max The Magnificent   1/25/2014 4:58:56 PM
NO RATINGS
@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
User Rank
Blogger
Artistic
Susan Rambo   1/25/2014 10:25:24 AM
NO RATINGS
Very creative, Max. You're having too much fun. You're the steampunk guy in the Hawaii shirt.

Garcia-Lasheras
User Rank
Blogger
Re: Artistic
Garcia-Lasheras   1/25/2014 4:38:28 PM
NO RATINGS
@Susan: "You're the steampunk guy in the Hawaii shirt"

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

Max The Magnificent
User Rank
Blogger
Re: Artistic
Max The Magnificent   1/25/2014 4:59:51 PM
NO RATINGS
@Susan: You're having too much fun. You're the steampunk guy in the Hawaii shirt...

LOL



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

MSGEQ7-Based DIY Audio Spectrum Analyzer: Testing
Max Maxfield
13 comments
In my previous column on this topic, we discussed the step-by-step construction of the first pass at a MSGEQ7-based DIY audio spectrum analyzer for use in my BADASS Display project. Of ...

Karen Field

June 2014 Cartoon Caption Winner
Karen Field
13 comments
Congratulations to "Wnderer" for submitting the winning caption for our June cartoon, after much heated conversation by our judges, given the plethora of great entries.

Jeremy Cook

Inspection Rejection: Why More Is Less in a Vision System
Jeremy Cook
3 comments
Albert Einstein has been quoted as saying, "Everything should be as simple as possible, but not simpler." I would never claim to have his level of insight -- or such an awesome head of ...

Jeremy Cook

Machine Fixes That Made Me Go 'DUH!'
Jeremy Cook
21 comments
As you can see in my bio at the end of this article, I work as a manufacturing engineer. One of my favorite things that happens on a Friday late in the afternoon is to hear my phone ring ...

Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)