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

[Cal Weldon]

Green means go, red means stop.

Amber means she's about to blow!

[PeteMcK]

Trying a bi-colour Led at the moment, It's red/yellow, I want it to look orange but the yellow is dominating, I'll have to try separate resisitors to cut down the yellow a bit.
(currently using 220 ohms off 4.2V ac)

[SY]

Infrared.

[raypalmer]

I'm the only vote for yellow???

I love the retro appeal. It always makes me think of that scene in the hunt for red october when the americans board the red october and it's got those yellow lights blinking for the (simulated) radiation leak.

I don't know why that's significant though.

[col]

red = clip

[Aengus]

Two problems with blue LED: one, it's annoying to the eye, as already mentioned; two, it became so trendy that it is certain to look very old-fashioned in the near future (anyone remember the fad for DATA70 typeface, and how old-fashioned all those businesses who put it into their logos soon looked?).

[OT] I've always liked the green that electroluminescent panels make - does anyone know if these panels generate a lot of noise, or shouldn't be used for some other reason? If not, they seem like they might work well as power indicators, since they run on mains current... [/OT]

Regards.

Aengus

[Steerpike]

Originally Posted by Aengus

I've always liked the green that electroluminescent panels make - does anyone know if these panels generate a lot of noise, or shouldn't be used for some other reason? If not, they seem like they might work well as power indicators, since they run on mains current

They need around 120V at a few tens of kilohertz. The required switching inverter is thus a great source of radio frequency noise - and needs effective shielding.
The FL panels are also short lived compared to LEDs.

Plus a good few tens of dollars for a power on/off indicator? (Compared to 5c for an LED!)

I hate the blue of blue LEDs. What would be nice as an indicator would be the aquamarine of VFL alphanumeric displays - not sure if LEDs come in that colour. Yet.

[sandyK]

I prefer the UV LED. Unlike Blue LEDs which can light up a small room at night, even at low current, the UV LED such as the attached from Jaycar, looks classy,and not obtrusive.
SandyK

CAT. NO. ZD0260 RRP $4.95
LED 5MM CLR UV 60MCD
Emitted colour: UVLens colour: clearWave length: 395nm: Pd W: If mA: If mA (peak): Min: Vf (V) Typ: 3.7Max: 4.2

[pliedtka]

I like my old tape deck - DISPLAY OFF. Play is Green. This BLUE thing is a bit Cookuku this days - Blue Ray, blue display, blue LEDs. "Blue" Fashion... I like Weldon's comment "Green means go, red means stop. Amber means she's about to blow!"

[refference]

The 5 mm Green LED !!