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In lugnet.dear-lego, Tom Covo writes:
> LEDs will only light up if the current is travelling in the right
> direction (polarity). So what I did was connect two LEDs, one green and one
> red, in different directions. What happens is this:
You can actually buy a single LED which operates the way you described. It
will be colorless when off, light up red one way and green the other, and if
you supply AC (lighting both) it will appear yellow.
--Ben
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Message is in Reply To:
 | | Home-made Light Bricks
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| Hi all, I would just like to pose a new idea. Current light bricks have lights, and different caps to provide different colors. What I am experimenting with now is the use of Light Emmiting Diodes(LEDs). LEDs will only light up if the current is (...) (25 years ago, 26-Jan-00, to lugnet.dear-lego, lugnet.robotics)
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