Bi Color LED
Bi-color LEDs consist of two LED emitters, normally in the colors red and green.
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Pin assignment:
- A typical bi-color LED module has three pins: GND (ground), red and green.
- The anode (positive connection) of the red emitter is connected to the red pin, and the anode of the green emitter is connected to the green pin.
- The cathodes (negative connection) of both emitters are connected together and connected to the GND pin
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How it works:
- When a positive voltage is applied to the red pin, the red emitter lights up.
- If a positive voltage is applied to the green pin, the green emitter lights up.
- By applying voltage to both pins (red and green) at the same time, a mixed color can be generated, e.g. yellow or orange.
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Control options:
- The intensity of each color can be controlled with pulse width modulation (PWM). Different color components can be mixed by switching the voltage on and off quickly.
- Bi-color LEDs are well suited for status displays, such as the charge status of a battery (red = empty, green = full).
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