Which colored LED do you like as the "Power On" indicator?

Which colored LED do you like as the "Power On" indicator?

  • Red

    Votes: 82 18.0%

  • Green

    Votes: 129 28.3%

  • Blue

    Votes: 147 32.2%

  • White

    Votes: 31 6.8%

  • Yellow

    Votes: 11 2.4%

  • Orange

    Votes: 30 6.6%

  • Violet

    Votes: 9 2.0%

  • Purple

    Votes: 17 3.7%
  • Total voters
    456
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#123
G.K. said:
Or just use audiophile-certified light bulbs instead of LEDs.
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The classic NE-2 (and NE-2G) are actually kinda neat. And use the classic red Nixie tubes for displays. My ECEN 325 class is still using signal generators and bench multimeters with red Nixie tubes, which actually work great. And that old stuff never seems to break. (On the other hand, two new NI "networkable" test platforms have broken down the second week of class. Go figure!)
Also electric vehicles are becoming unsafe (for pedestrians) and an electronic " roar!" is being studied.
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The ones I have seen already have that - the very unique high pitched squeal of the power electronics. It catches my attention pretty easily. (Then again, I'm of the type that typically has a higher audio frequency response than average and I'm quite used to all those "electronic" high pitched noises.)

Just have the cars play back a 60Hz/120Hz buzz. The kind the general public would recognize as an "electric" sound.
 
#124
Mr Evil said:
That list of colours really doesn't fit well with how people actually perceive colour. They are only used because Newton had a thing for the number seven.

English has about eleventy billion words for blue, and the same again for every other colour.
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Agreed, these are fairly arbitrary divisions; but any proposed set of divisions -whether based on numerology, or some individual's ability to resolve colour differences - will be equally arbitrary. ROYGBIV works fairly well for me when there's a clear view of a rainbow against a neutral background. I think of violet as that colour that's trembling at the edge of vision, and indigo as the bit that's fairly distinct from the real blue and the the edgy bit. :xeye:

Regards.

Aengus
 
#128
star882 said:
The classic NE-2 (and NE-2G) are actually kinda neat. And use the classic red Nixie tubes for displays. My ECEN 325 class is still using signal generators and bench multimeters with red Nixie tubes, which actually work great. And that old stuff never seems to break. (On the other hand, two new NI "networkable" test platforms have broken down the second week of class. Go figure!)
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Well, you do get a lot less smog with those neons than you do with light bulbs 😉
I once had a stash of Nixie tubes, but due to my predicament at the time I had to get rid (throw out) a lot of stuff, and the Nixie tubes were on the short list. I wish I still had 'em; I'd make a frequency counter with them.
I've got an early 70's bench-top multimeter with a Nixie tube display that still works perfectly fine.
 
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#134

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#139
These can be made to self-count also, but you need a bunch of diodes and capacitors as well as resistors to make a ring-counter. Not sure how fast they'd count though.

I'm going to use 6 of the ZM1050's in a 74HC logic based frequency counter with a 100mS gate. That will give me 10Hz resolution and operation to 30MHz or so.
This is going to be a rack-mount counter to monitor my HF local oscillator (160m-40m). 7-segment LED displays just don't look right in an exciter rack next door to vintage AMT-150/AT21, CTM-2K and AM20 RF transmitters.....
 
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