A few nice LED images I found:
LED gigante en Aardvark
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Hoy nos vinieron a dejar un LED gigantesco que ira en la Facultad de Comunicaciones de la Universidad Catolica. La idea es que tomemos ciertos Feeds RSS de noticias y sus titulares vayan pasando por el LED. Ni se imaginan lo bien que lo estamos pasando. Dan ganas de tener uno propio para colgarlo afuera del edificio e ir publicando los resultados de los partidos del mundial.
LED gigante en Aardvark
Image by
Hoy nos vinieron a dejar un LED gigantesco que ira en la Facultad de Comunicaciones de la Universidad Catolica. La idea es que tomemos ciertos Feeds RSS de noticias y sus titulares vayan pasando por el LED. Ni se imaginan lo bien que lo estamos pasando. Dan ganas de tener uno propio para colgarlo afuera del edificio e ir publicando los resultados de los partidos del mundial.
LED Fireflies in a Jar
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An ATtiny13 uses PWM to fade 12 0603 surface mount green LEDs in and out, suspended from the PCB inside a jam jar. The ATtiny13 picks a random LED to flash each time, flashes it once, twice or three times randomly, then waits a random amount of time before flashing the next one. An incrementing counter is stored in EEPROM and used to seed the random number generator, leading to a different sequence each time the device is powered up via the switch mounted on the top. The LEDs are arranged in a standard 3×2 matrix which gives 6 LEDs, and for each position there is a second LED in reverse. The two column controllers are PB0 and PB1 as they can do PWM – another two LEDs could be added between PB0 and PB1 (and were on the prototype) but made the PCB design needlessly more complex: 12 is more than enough!
Watch the video of them in action here: uk.youtube.com/watch?v=0Yk0CZp2Ywc
Inspired by: www.instructables.com/id/Jar-of-Fireflies/http://negative…
More info and source files:
negativeacknowledge.com/2008/10/18/led-fireflies-in-a-jar…
LED Fireflies in a Jar
Image by
An ATtiny13 uses PWM to fade 12 0603 surface mount green LEDs in and out, suspended from the PCB inside a jam jar. The ATtiny13 picks a random LED to flash each time, flashes it once, twice or three times randomly, then waits a random amount of time before flashing the next one. An incrementing counter is stored in EEPROM and used to seed the random number generator, leading to a different sequence each time the device is powered up via the switch mounted on the top. The LEDs are arranged in a standard 3×2 matrix which gives 6 LEDs, and for each position there is a second LED in reverse. The two column controllers are PB0 and PB1 as they can do PWM – another two LEDs could be added between PB0 and PB1 (and were on the prototype) but made the PCB design needlessly more complex: 12 is more than enough!
Watch the video of them in action here: uk.youtube.com/watch?v=0Yk0CZp2Ywc
Inspired by: www.instructables.com/id/Jar-of-Fireflies/http://negative…
More info and source files:
negativeacknowledge.com/2008/10/18/led-fireflies-in-a-jar…
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