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

[Geek]

Typically the blue LED's are very bright and get uncomfortable as it get darker in the room.

They are, but you don't have to run them at full current either.

Cheers!

 

[acidbrain]

Mr. White

 

[neutron7]

Blue LEDs were cool for a while when they were rare, but now they are just annoying

 

[Geek]

Mr. White

... in the conservatory with the candlestick

 

[lgreen]

haters!

An externally hosted image should be here but it was not working when we last tested it.

 

[lgreen]

blue!

Haters!!!

An externally hosted image should be here but it was not working when we last tested it.

 

[krachkiste]

Same opinion on blue leds. Distracting, disturbing and they have this enerving glow (because the eye can't focus it right, I once heard).
If at least it was a blue worth the name. With a shorter wavelength, like 440nm-ish - and not this cheap plastic allmost cyan-blue.

So depending on the design, I would go for classical red, amber or some fancy green led like in todays macbooks (not these lime allmost yellow ones). Allthough white might also be a nice option (if you can't decide for a color, just take them all ).

 

[Geek]

I saw a "teal" coloured LED (my favorite colour), but the dang thing was $5/ea. in 100-lot QTY

Cheers!

 

[wrenchone]

If by teal you mean blue-green, Electronic Goldmine was selling some of those - you might try there. A few mils is all you need for optimum brightness and it's an attractive and (for LEDs) unusual color. Another favorite of mine is the old glass-jeweled (not faceted) pilot lights. I have a couple I'm saving for that special project.

 

[gain wire]

Well, if I'm building something medium to high-tech, I'll use a red LED. Blue is too popular now, and I donT' like super bright LEDs of any colour. I will prefer a green LED with a clear case to red one, if it's available in my stock. Or else I'll put whatever I have.

HOWEVER

I Do not install a LED on TUBE AMPLIFIER -ANACHRONISM HELLLO - or on any project that is meant to be a recreation of equipment that was designed and built in a time when LEDs did not exist.

Incandescent light.

 

[GK]

Being the brilliant mind that I am, here is what I just conjured up. This will produce the whole psychedelic spectrum of colour producible by a bi-colour LED, in rhythm to your music’s bass.

 

[sandyK]

Power On Indicator

"I Do not install a LED on TUBE AMPLIFIER -ANACHRONISM HELLLO - or on any project that is meant to be a recreation of equipment that was designed and built in a time when LEDs did not exist."

I guess it must be awfully hard to get 5Y3s and 80s these days ?

 

[gain wire]

even though those are reknowned (moreso the 80) tubes, I don't use them. I do imagine that yes, they are hard to get, and will only become more harder to get because unlike guitar amplifier tubes, they haven't started making these again. At least not to my knowledge.

Besides, I still am not going to put a LED on a germanium transistor premaplifer chassis, nor an RTL IC logic controller for my open reel tapedeck. Although LEDs were affordable by 1970's standards (1$ each), they just didn't catch on until a while later. Or else you'd have seen them on a bunch of seventies audio equipment, or even HP and Tektronix stuff of the mid-to late seventies. Now I wasn't there but I'm pretty sure I speak the truth. From what I've seen and own.

OK, OK, so some television channel indicators used seven segment displays, okay right.

over and out.

 

[Geek]

If by teal you mean blue-green, Electronic Goldmine was selling some of those - you might try there. A few mils is all you need for optimum brightness and it's an attractive and (for LEDs) unusual color. Another favorite of mine is the old glass-jeweled (not faceted) pilot lights. I have a couple I'm saving for that special project.

Found them, thanks!!!!

 

[Wavebourn]

Being the brilliant mind that I am, here is what I just conjured up. This will produce the whole psychedelic spectrum of colour producible by a bi-colour LED, in rhythm to your music’s bass.

Such a brilliant mind forgot to rectify the signal.


Good attempt!

 

[GK]

Such a brilliant mind forgot to rectify the signal.

OK, you obviously can't follow the circuit then The two LEDs within the bi-colour LED package are driven in anti-phase. A positive signal swing makes one brighter and the other dimmer, while negative signal swings do the opposite.

BTW, I haven't built this so I don't how effective the psychedelic effect would be. It would depend entirely on the nature of the asymmetry of the bass signals. A lower LP corner might be better too; just increase the value of the two capacitors in the filter.

This was just a mornings brain-fart.

 

[Pano]

Pink! I still have some pink LEDs. The fun thing is that they go blue after awhile. Serves as a "burn-in" indicator.

 

[Geek]

Pink LED's wear out the fastest, due to the phosphor characteristics or something

Cheers!

 

[Wavebourn]

OK, you obviously can't follow the circuit then The two LEDs within the bi-colour LED package are driven in anti-phase. A positive signal swing makes one brighter and the other dimmer, while negative signal swings do the opposite.

BTW, I haven't built this so I don't how effective the psychedelic effect would be. It would depend entirely on the nature of the asymmetry of the bass signals. A lower LP corner might be better too; just increase the value of the two capacitors in the filter.

This was just a mornings brain-fart.

Sure it was a fart.

Build it and see for yourself how asymmetric HPF-ed signals are.

 

[GK]

HPF-ed signals are.

It's a low-pass filter, numnuts.