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Wiring a 2 lead bicolor LED to a 3pin circuit?

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pavjayt

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Hello,

I am wondering on how to connect a 2 lead bicolor led to a board with 3 pins (anode/cathode/anode). Any ideas/suggestions?

thanks
 
What is driving the two anode pins and the cathode pin?
 
the two anode pins are 2.1V and 1.8V respectively and the cathode is gnd. At any given time only one anode is active.

thanks
 
Assuming the voltage sources driving the anode pins are 5V, the voltages on those pins are clamped at 2.1V and 1.8V by the LED forward voltages and neither voltage source provides a low impedance to ground when inactive then something like this should do what you want :
BicolorLEDDriver.gif
The three pins are A,B,C.
If, however, the voltage sources do provide a low impedance to ground when inactive then all you need is R1/D1/D2.
 
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