LED Fireflies in a Jar : 無料・フリー素材/写真
LED Fireflies in a Jar / Adam Greig
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | 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 3x2 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=0Yk0CZp2YwcInspired 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... |
| 撮影日 | 2008-10-18 21:58:51 |
| 撮影者 | Adam Greig |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS 450D , Canon |
| 露出 | 0.017 sec (1/60) |
| 開放F値 | f/1.8 |
| 焦点距離 | 50 mm |