small rgb light from led rgb band

[daryus191]

I took from an rgb led band some leds from it and i want to do like a panel of them with only one color (blue) and i don t know how can i connect them together and power it(i want to power it with batteries and not in the socket). i don t know what all of the 6 pins do and i can not find any info of the pins on the internet.Can someone help me?(something like those 3 connected but i need some specific pins conected to work and i can not find them)

 

[Nigel Goodwin]

You need a microcontroller to feed them, they aren't just LED's they are three colour LED's with a built-in controller IC.

Look up WS2812, there are plenty of Arduino examples.

 

[daryus191]

actually i can power it up with a battery and i need only 1 color blue.

 

[daryus191]

but i don t know how to connect more because 1 wire is + and 1 is - and when i try to connect it +-+- does not work

 

[Les Jones]

As Nigel has told you you need to study the WD2812 datasheet to understand how to control the colour from the LEDs. This is a link to the datasheet.
https://www.digikey.co.uk/en/datasheets/parallaxinc/parallax-inc-28085-ws2812b-rgb-led-datasheet
It gives you the structure of the data signal that controls the colour,
The LED strip from which you removed them was probably supplied with a controller that generated the required control signal. So you could use that if you don't want to write the code to allow a microcontroller to generate the control signal.

Les.

 

[Pommie]

They are also known as Neopixels.

Mike.

 

[Diver300]

I don't think that those are the ones that are controlled by a digital signal. I think that they are simply a red, a green and a blue LED in one package.

 

[Pommie]

If you look at the last picture in the original post, they look to be daisy chained which would suggest power plus Dout to Din.

Mike.

 

[ChrisP58]

but i don t know how to connect more because 1 wire is + and 1 is - and when i try to connect it +-+- does not work

Since one LED works with one battery, but more than one LED doesn't work wit one battery, then you probably need a higher voltage to run more than on LED.

Each LED has a forward voltage that must be met to turn it on. I don't know what voltage your LEDs need, but when you add LEDs in series, the individual voltages add up. If one LED needs 3 Volts, then two will need 6 Volts, three will need 9 Volts, etc.

 

[Nigel Goodwin]

If you look at the last picture in the original post, they look to be daisy chained which would suggest power plus Dout to Din.

Mike.

I agree, they look like nothing else other than Neopixels - and is what almost all of those strips of multicoloured LED's use. Even my new PC has them inside, along with at least seven fans, and a glass side - it's a gaming computer, and seemed the best way to get a decent spec at a decent price. Luckily it comes with a small remote control, and you can turn the LED's OFF

 

[Diver300]

If you look at the last picture in the original post, they look to be daisy chained which would suggest power plus Dout to Din.

Mike.

There are only three, so it could equally well be three red led in series, three greens in series and three blues in series.

The first picture is very detailed, and it looks like three separate led chips, each mounted on a separate area of the lead frame, and each with one bond wire. That would be consistent with mounting the three assemblies together to get three strings, each of three leds.

 

[Nigel Goodwin]

There are only three, so it could equally well be three red led in series, three greens in series and three blues in series.

The first picture is very detailed, and it looks like three separate led chips, each mounted on a separate area of the lead frame, and each with one bond wire. That would be consistent with mounting the three assemblies together to get three strings, each of three leds.

Here's a picture of a Neopixel through a microscope, looks pretty similar, with the same 6 contacts. As the OP ripped the LED's off a strip, perhaps he look at the strip, as they are usually clearly marked.

 

[Diver300]

The Neopixel has the same leadframe, but it also has an IC. I can't see one of those in the OP's picture, only what look like 3 LEDs.

(I've guessed which colour is which)

The three bond wires can be seen. I think that the connections a the top of the photo are the -ve connections and the ones at the bottom are the +ve, and that there are three isolated LEDs.

The OP's LEDs appear to be very similar to these:- https://uk.farnell.com/multicomp/703-1039/led-rgb-5050/dp/2112155

The ones I linked to have two LEDs of each colour in parallel, while the OP's ones are just one of each colour, but it's the same package and a similar leadframe.

 

[daryus191]

I've connected all the + toghether and all the - toghether and works. I think that i connected them in paralel and if one die the other ones work?And i have one more question:I want to use or internet or bluetooth to connect them to my phone and i want to be portable. I've seen something with arduino but it is not quite portable. I've seen this module: https://cleste.ro/modul-bluetooth-4-0-ble.html?utm_medium=GoogleAds&utm_campaign=&utm_source= and i think it needs some other arduino things. Is there some bluetooth module that i just power it up and works?