Rainbow Colour Cycling 3mm LED

<p>Innovative, eye catching rainbow 3mm LEDs that contain an inbuilt IC that causes the LED to cycle through the red, green and blue elements, individually and then in combination. Colour cycles every 33 seconds.</p>

Water clear or diffused lens types
Ideal for use in warning devices, indication panels, alarm systems, mood lighting, toys

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Technical Details
Questions (1)

Colour	Lens	V_F	V_F	Blinking	Lum. int. (mcd)	View	Wave-
	type	typ. (V)	max. (V)	cycle (s)	@ I_F=20mA	angle	length (nm)
Red	Water clear	4.5	5	33	5000	30°	624
Green	Water clear	4.5	5	33	5000	30°	525
Blue	Water clear	4.5	5	33	3000	30°	470
Red	Diffused	4.5	5	33	2500	30°	624
Green	Diffused	4.5	5	33	2500	30°	525
Blue	Diffused	4.5	5	33	1500	30°	470

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31 May 2012 Question by: Rapid Customer | Product code: 55-1907

Q. Do you need to use a resistor with these leds ?

A. Thanks for your enqury. For all LEDs the Vf figure is the important voltage, a resistor is only required if the supply voltage exceeds this in order to “lose” the excess voltage. To calculate a resistor value use the formula R (resistor) = Vs (supply)-Vf (led) divided by the current required (usually approx 80% of Imax) in this case use 20mA. The resistor power rating will depend on the amount of energy it is required to disperse, the higher the voltage the higher the power value – Voltage (across resistor) X Current.