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programable led Answered

i have a project that requires a board with multiple led's that each led can be programed to blink at specific frequencys. i then will run plastic fiber optitics to the location where the light is to display. i have no idea were to start with this.... so i ask - jt

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photozz (author)2007-02-06

you could use a series of 555 or 556 chips for the frequency, depending on the number of LED's. How many are you talking about?

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wavejumper (author)photozz2007-02-06

to be perfectly honest - i am looking for a starting point on how to even start to build this type of thing. I need to put a varying number of lights behind a picture for visual effects. The number of lights will very depending on the picture i put them on. I am looking for an inexpensive solution that i could build for these projects.

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VIRON (author)wavejumper2007-02-09

This is an old recipe for a simple cheap circuit that can easily be hacked into the effect of lights around a frame or wheels turning. As it is, it just blinks left and right like a railroad crossing.

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VIRON (author)2007-02-09

This will easily generate frequencies like 1 and 2 and 4 and 8 and 16 etc blinks per second and each LED will have it's own frequency. Adding various logic gates can produce other frequencies by mixing. The 4060 is one of the weirdest and unexpectedly useful common chips. Go ahead and use a 500K trimmer pot instead of resistor to change speed. If the 4024 is more common it can work the same way but only with 7 LED's, and that's ok because the 4060 is likely to have some blinking way too fast and some way too slow. Remember LED polarity, and a filter capacitor on the power source.

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VIRON (author)VIRON2007-02-09

Sorry I misunderstood, this will not be useful for fiberoptically controlling powered LED's. If the fiber optics are reasonably sized, the ends of them should emit light or go into a bead that does, and the programming of the sequence, I think, is done with a clock motor (seconds hand speed) and a color wheel, which you could print with an inkjet onto transparencies, and then cut it out and mount on the motor. Many individually powered, remote controlled LEDs just seems like a waste of parts. But then again such waste is commonplace and I like when it is "dumped" on me.

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VIRON (author)VIRON2007-02-09

Is this what you want? Another single chip solution controls a bunch
of LEDs in a sign, and commands could be sent to the sign through
a serial port on the chip. You don't have to arrange the LEDs in that pattern.
Dot Matrix LED

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