LED color - Electronic Circuits Projects Diagrams Free

raresh_r · 11th February 2008, 08:38 PM

Hi, is there possible to change a LED color ? i want to make the indicators from the dashboard of the car to change color in different speed(blue slow, red fast speed)

ronsimpson · 11th February 2008, 09:00 PM

You can get multi-color LEDs. There are RGB LEDs. They have 3 LEDs inside. You vary the amount of current in each LED to get the right mix of color you want.

Hero999 · 12th February 2008, 10:44 PM

RGB LEDs are pretty common but if you just want red and blue you can get red/blue bi-colour LEDs or just use an RGB and ignore the green.

http://www.lc-led.com/View/itemNumber/150

raresh_r · 12th February 2008, 11:06 PM

white and red exists ?

erosennin · 13th February 2008, 11:05 AM

Quote:

Originally Posted by raresh_r

white and red exists ?

No, red and white are mathematical constructs - just like a pixel... They do not exist.

Dean Huster · 13th February 2008, 03:36 PM

Back before blue LEDs were even developed, I had students who used to routinely change the color of red LEDs to orange by using them without current-limiting resistors for a prolonged period.

Dean

Hero999 · 15th February 2008, 03:43 PM

Quote:

Originally Posted by raresh_r

white and red exists ?

Just use an RGB LED which can produce a whole rainbow of colour, including white.

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11th February 2008, 08:38 PM	#1
raresh_r	LED color Hi, is there possible to change a LED color ? i want to make the indicators from the dashboard of the car to change color in different speed(blue slow, red fast speed)

11th February 2008, 09:00 PM	#2
ronsimpson	You can get multi-color LEDs. There are RGB LEDs. They have 3 LEDs inside. You vary the amount of current in each LED to get the right mix of color you want.

12th February 2008, 10:44 PM	#3
Hero999	RGB LEDs are pretty common but if you just want red and blue you can get red/blue bi-colour LEDs or just use an RGB and ignore the green. http://www.lc-led.com/View/itemNumber/150 __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

12th February 2008, 11:06 PM	#4
raresh_r	white and red exists ?

13th February 2008, 03:36 PM	#6
Dean Huster	Back before blue LEDs were even developed, I had students who used to routinely change the color of red LEDs to orange by using them without current-limiting resistors for a prolonged period. Dean __________________ Dean Huster, Electronics Curmudgeon Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines). R.I.P.