2020-04-11 10:47:26 +02:00
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2016-08-15 22:45:51 +02:00
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# flame.ino
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This is a small arduino sketch to drive a string of WS2812 LEDs wound around
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a tube, to simulate a flaming torch.
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I have carried around the torch on various events and it has proven quite
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2016-08-15 23:39:34 +02:00
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popular and served as inspiration for other similiar builds, see for example
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the work of Lukas, who expanded on the idea and added message scrolling:
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https://github.com/plan44/messagetorch
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2016-08-15 22:45:51 +02:00
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This code is built for 5m LED strip with 64 led/m. The circumference of the
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tube is about 17-20 cm, so that after 12 leds one winding is complete.
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2019-01-04 22:59:14 +01:00
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Originally there were some funky problems since for larger numbers of LEDs the
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rendering code tends to interfere with the bootloader activation since the
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"Catarina" Bootloader relies on some values in very specific memory locations
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to decide if it starts the main application or not. This value was prone to get
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clobbered by the flame rendering code, in extreme cases it even required to
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reflash your leonardo via ISP.
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I now have implemented a somewhat ugly workaround. By strategically dis- and
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re-enabling interrupts and checking for the bootloader-entering-condition at
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the beginning of loop() the code now makes entering the bootloader via the IDE
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a lot more reliable.
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2016-08-15 22:45:51 +02:00
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I tried to keep the code clean and have the most important values as
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defines, so that it can be adjusted to different led layouts.
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Have fun!
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Simon
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2019-02-04 11:48:08 +01:00
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Build instructions and "documentation":
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https://www.commander1024.de/wordpress/2019/01/arduino-led-fackel/
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Greetingz
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Commander1024
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