Subject:
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Re: Homemade LED Bricks
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 15 Nov 1999 23:30:23 GMT
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Viewed:
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632 times
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Terry King wrote in message ...
> Anyone seen a TWO-TERMINAL bi-color LED??? It would be nice for
> fitting into a small transparent beacon.
Well, yes, the black brick in the pictures in my first message has a
two-terminal bi-colour LED in it. These things have been widely available
(in Europe) for years. They work fine with a 330 Ohms resistor too. I could
also get tri-colour LEDs (red, green, yellow). These have three terminals. I
went for the two-terminal ones.
OTOH, I don't know the internal wiring of the three-terminal LED, but can't
you just solder two of the three terminals together? If one of the wires is
a common cathode or anode, it won't work, red and green will light up at the
same time.
>
> I have successfully made contacts on my bricks with copper foil
> tape on a standard brick. I'll put up a .JPG if someone can tell
> me where there is an appropriate Binary location on this server....
You could put the pictures on your ISP's server. Everybody else here does...
I'd really like to see an alternative to electric plates. Hell, I'll put the
pictures online if you want. Just email them (to me, not to this NG).
>
> GOTTA have Blinking Lights!!!!!
Radio Shack used to have stores in this country (the Netherlands) years ago.
I remember they used to sell blinking LEDs. They pulled out though. I don't
know why.
My local electronics store has various types of blinking LEDs. They take a
different input voltages. They have 3, 5 and 12 volt varieties (all red).
The 12 volt type works fine on the output of the RCX, without any additional
circuitry.
Enjoy,
Arjen
>
>
> --
> Regards,
> Terry King ...In The Woods In Vermont
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Message has 1 Reply:
 | | Re: Homemade LED Bricks
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| I have put the copper-foil-on-standard-brick pictures up on my website; temporarily you must look at: (URL) will put up a page with more info soon as I get some other work done!! That page WILL LATER BE: (URL) Regards, Terry King ...In The Woods In (...) (25 years ago, 16-Nov-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Homemade LED Bricks
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| I've made a few LED 'bricks, and am about to make some more like "Flashing towers" with some of the ??name?? tapered cones and transparent small round tops. 330 Ohms is my pick; plenty bright at about 20 Ma for most LEDs and dims nicely with "Set (...) (25 years ago, 15-Nov-99, to lugnet.robotics)
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