next topic »

[on:]

Hi

I help with the programming for an RGB led.
The problem is, unlike other LED's I have seen, it only has two prongs....... so i have no idea how to program each individual colour. I know it is an RGB because when its at maximun voltage, it flashes all these colours by itself, so Im a little confused.

[Reply #1 on:]

2 lead RGB LED's dont exist.  you would have to have an led with 4 leads for it to be a RGB LED.  one lead for each color and a common anode or cathode.  Unfortunatly you have a single color LED.

[Reply #2 on:]

Or possibly a two-color LED, I think they make for instance red and green LEDs in one package connected in reverse parallel.

[Reply #3 on:]

Well my LED has two pins, and uses three colours....... which is why Im so confused

[Reply #4 on:]

2 lead RGB LED's dont exist.

But they do on ebay.
Not controllable RGB LEDs, but LEDs with built-in blinker ICs.

[Reply #5 on:]

Well my LED has two pins, and uses three colours....... which is why Im so confused

Perhaps you have a datasheet or a link to the part that you could share. There are literally millions of different LEDs out there, so it's pointless speculating about which one this happens to be.

[Reply #6 on:]

Well my LED has two pins, and uses three colours....... which is why Im so confused

Perhaps you have a datasheet or a link to the part that you could share. There are literally millions of different LEDs out there, so it's pointless speculating about which one this happens to be.

No I don't sorry. U just needed an RGB for Uni, and they gave me that one....... so I dunno. I think I'll buy a proper one to save myself the time.

[Reply #7 on:]

U just needed an RGB for Uni, and they gave me that one

So if they are expecting you to control it with an arduino all you can do is turn it on or off. I think either your Uni made a mistake, or they are idiots.

[Reply #8 on:]

I know this is an old thread but I just wanted to point out that the previous posters are incorrect in that there are multicolored LEDs with only 2 leads.

[Reply #9 on:]

I know this is an old thread but I just wanted to point out that the previous posters are incorrect in that there are multicolored LEDs with only 2 leads.

Care to point one out?  Specifically what the original poster wanted, an RGB LED.

[Reply #10 on:]

I would assume that the OP wanted to do something besides watch it flash?..?
Unfortunately ALL the 2 wire RGB LED''s DO IS FLASH... Great attention getters though, nice for overcurrent alarms.

Bob

[Reply #11 on:]

You'll also find a lot of "phototransistors" with only 2 leads, on ebay.

[Reply #12 on:]

You'll also find a lot of "phototransistors" with only 2 leads, on ebay.

What relevance is that? Most photo transistors only have two wires.

[Reply #13 on:]

How can you have a transistor with only 2 wires ?  Transistors have 3.

I suspect that these alleged 2-wire transistors, are actually diodes.

[Reply #14 on:]

Because the base is not brought out but is just recieving a photo current. Photo diodes work and are connected in your circuit a diffrent way.