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

[63781]

My company got a new logo designed, using black, white and orange. So naturally, the LEDs should be orange!

 

[Wavebourn]

It's a low-pass filter, numnuts.

Your music is already HPF-ed, wonderkid!

 

[chris661]

I prefer blue, around the controls like this amplifier

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

Chris

 

[GK]

Your music is already HPF-ed, wonderkid!

Yup, at 100Hz
🙄

 

[GK]

Build it and see for yourself

Well guess what; that is exactly what I just did The asymmetry of lots of music wasn't particularly great and the effect was only so-so effective. So I added a rectifier (big deal).

A silent video of the modified circuit operating in the dark, with a 5mm bi/tri colour LED, pulsing to the beat of Paradise by Sade can be viewed by clicking on the link here:


http://users.picknowl.com.au/~glenk/bassled.AVI


I can't remember the last time a made something this exciting! LOL!

 

[calvert73]

Violet or Green

I prefer Violet with Black front panels and Green with silver, dont like 5mm LEDs I prefer 3mm flat top cylindrical, I dont think there are any Violet yet in this format so I use a light pipe (3mm Perspex).

I did read somewhere that Blue light has a negative affect upon the human mind so best to avoid I think when the goal is musical pleasure.

We gotta be nuts!

RC

 

[Geek]

I bought some really flourescent tubing and would like some UV LED's to make them light up. But alas, 365nm and shorter LED's are impossible to come by 🙁

I did read somewhere that Blue light has a negative affect upon the human mind so best to avoid I think when the goal is musical pleasure.

My mom took a few psychology courses and her textbooks had interesting info on this... blue, especially dark blue lighting, enhances pretty much every negative emotion, while pink enhanced positive ones.

(see, there's logic in why we like to see girls in pink 😛 )

Cheers!

 

[GK]

My mom took a few psychology courses and her textbooks had interesting info on this... blue, especially dark blue lighting, enhances pretty much every negative emotion, while pink enhanced positive ones.

Viewing blue light lowers melatonin levels; particularly bad for you if you have boobs, apparantly:

http://www.abc.net.au/catalyst/stories/s968291.htm

 

[Pano]

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

You are correct, sir! They were meant for brief use, so the toy would be thrown away before the color ever faded. I still like them.

I do enjoy LEDs. My first electronics projects - back the 70s - where LED chase lights. I built all kinds of pins and badges with flashy lights. Even had a jacket and shoes with LED chase lights. I was King of the disco! Ah.... the 70s.

 

[star882]

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

Use a R/B LED and adjust the currents so it lights up pink.

Viewing blue light lowers melatonin levels; particularly bad for you if you have boobs, apparantly:

http://www.abc.net.au/catalyst/stories/s968291.htm

In contrast, I remember reading that red light makes a good nightlight as it affects night vision the least.

 

[jechentau]

i have a neon light for mains power on, a yellow led for HV voltage on, a green led as current gauge.

and a violet (405 nm), a deep red, and a amber one with some zeners as a voltage reference.

and the EL84 output. looks nice all in the dark ;p

 

[thoriated]

Who knows? I might try to do a 'brown' LED using a RGB for my next project.

 

[ratza]

How about an RGB LED and a controller to have a random color each time you power it up?

 

[Wavebourn]

Well guess what; that is exactly what I just did The asymmetry of lots of music wasn't particularly great and the effect was only so-so effective. So I added a rectifier (big deal).

A silent video of the modified circuit operating in the dark, with a 5mm bi/tri colour LED, pulsing to the beat of Paradise by Sade can be viewed by clicking on the link here:


http://users.picknowl.com.au/~glenk/bassled.AVI


I can't remember the last time a made something this exciting! LOL!

Now try this: a logarithmic amp after a rectifier/smoother, then C-R differentiating network to detect attack/decay and drive your LEDs. Such a way you will got good effect independent on loudness. I did that for a stage light (drum set), 8-channel thingy with thyristor control.

Who knows? I might try to do a 'brown' LED using a RGB for my next project.

Brown is a dark yellow. You will need brighter background for a yellow LED to get brown color.

 

[GK]

Now try this: a logarithmic amp after a rectifier/smoother, then C-R differentiating network to detect attack/decay and drive your LEDs.

That would seem quite overkill for a LED.

Anyway, here is the final circuit. The LED glows green with no signal, and turns to full red with max. signal.

 

[Wavebourn]

I used some Red, Orange, Blue, and Green in my Pyramid amp prototype:

 

[Wavebourn]

That would seem quite overkill for a LED.

Anyway, here is the final circuit. The LED glows green with no signal, and turns to full red with max. signal.

Here was my version (passive indicators inside of speaker cabs):

 

[GK]

In contrast, I remember reading that red light makes a good nightlight as it affects night vision the least.

Meeeerrrroooooowwwwwwwwww.

 

[sivan_and]

A few blue LED's focused to the ceiling makes a good night/ bed lamp 😀

 

[star882]

Wouldn't sensing the supply current be easier?