RGB floods

**Daemon** · 05-16-2010, 11:10 PM

Does anyone have a board design for a flood or strip that actually uses RGb 3 leg leds?

I have a few thousand of them and need a home for them.

**David_AVD** · 05-17-2010, 06:16 AM

Can't say I've seen 3 leg RGB LEDs. Did you mean 4 leg? (one for each colour + a common)

The reason they don't get used is you can't configure them in a useful way. Using 3 resistors with each colour of each LED is grossly inefficient.

**n1ist** · 05-17-2010, 06:50 AM

Frank's strips use 4-pin Piranha RGB LEDs with individual resistors, as does many of the RGB pixel designs. As David said, for a panel, individual LEDs or 6-leaded RGB LEDs is a better choice since you can wire them in series (preferably with a true constant-current source) for more efficiency.
/mike

**LabRat** · 05-17-2010, 08:51 AM

I've played with the common annode (or common cathode) LED's before, but most of them lack the brightness required to act as a flood lamp. They're great for a more subtle mood lamp (perhaps placed behind some type of translucent diffuser). But there's no way the ones I have would be able to flood anything more than a box of kleenex.

Your mileage may vary, may not appear as shown, I'm not a lawyer nor do I play one on television, these aren't the droids you seek.

**IdunBenhad** · 05-17-2010, 11:28 AM

Hi:
RGB floods.

Sounds like too much water in Russia.

**Daemon** · 05-17-2010, 12:48 PM

Originally Posted by David_AVD

Can't say I've seen 3 leg RGB LEDs. Did you mean 4 leg? (one for each colour + a common)

.

Your right. I never mentioned the common because it is too common.

**Daemon** · 05-17-2010, 12:50 PM

Originally Posted by n1ist

Frank's strips use 4-pin Piranha RGB LEDs with individual resistors,

Is that the RGB strips + W?
Can you show me a link to one please. All I could find of Franks stuff used individual green,blue,red and whites I thought.

**budude** · 05-17-2010, 01:53 PM

Frank's strips hold up to 18 RGB SuperFlux/Piranha LEDs AND up to 18 single color (usually white but don't have to be) SuperFlux/Piranha LEDs. Each LED/color requires a current limiting resistor (18 x 4 or 52 resistors). The strips can use either common anode or cathode RGB LEDs but it's suggested you use common anode since most DC controllers here use switched grounds and common positive sources.

I was going to suggest the strip but - it would be a bit of work to install the regular RGB LEDs and as LabRat indicated, they typically aren't as bright. I got a bag of 50 of them myself a while back and still haven't figured out what to do with them...

**kychristmas** · 05-17-2010, 01:54 PM

Here ya go...

Frank's Super Strips

If you are interested, I have a bunch of these that I'm not going to use and will be offering up for sale. I also have some of the RGB and White LEDs to populate them.

Kelly

**Daemon** · 05-18-2010, 02:43 AM

Originally Posted by kychristmas

Here ya go...

Frank's Super Strips

If you are interested, I have a bunch of these that I'm not going to use and will be offering up for sale. I also have some of the RGB and White LEDs to populate them.

Kelly

Hi

Thanks. Not a lot of information on that page is ther but I know where to find it.
I was looking at those but decided from the picture of the board that it was for individual red, green and blue and white leds.

How much are the boards each? I would be interested in getting some/all.
I have plenty of RGB leds but could use a few whites if I did grab the boards.
Send me a PM if you like.
Cheers
D