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50 x Dual-Color LED Red+Green 3mm (foggy).
We have LEDs in every color, please visit our store!
Max. current (continuous) is 20mA, resulting in 1.9V (red) to 2.2V (green) forward voltage.
LEDs are operated at constant current, not voltage! It is necessary, to limit the LED forward current with a resistor. The value of the resistor is easy to calculate following Ohm’s law: R = U / I
For example, on a 12V power supply, U = 12 – 2.2 = 9.8V, I = 0.02A. The resistor in this circuit should not be less than 9.8 / 0.02 = 490 Ohm (for max. brightness).
For battery operated applications, you should consider a much lower LED current, for example 3mA.
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