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Unread 31-03-2014, 17:02
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Re: LEDs

Quote:
Originally Posted by TheHolyHades1 View Post
After the last competition, I've seen that LEDs are certainly allowed on the robot; many teams had them on their arms/shooters as well as couple teams with under-robot lighting. There were a few teams that *appeared* to be using programmable LEDs; does anyone have any idea how the teams may have programmed these? I know the LED strings come with timers, but I'm almost positive those can't be used on the robot.

Speaking of LEDs, does anyone have any suggestions for a decent LED (maybe multicolor?) string product, preferably one that their team is using /has used?
The rise of popularity is mostly due to cheap availability of WS2812 strips and the like. You can control 100's of LEDs with just 3 wires, so it's really simple wiring. Sparkfun and Adafruit carry bulk strips for around $100 per 300 LEDs. If you put more than a few dozen LEDs you'll need a power supply, the ones my team uses are the 7A 5V buck converters from Pololu. Programming the LEDs is usually done with an Arduino or clone. You can drive the WS2812 strips using Adafruit's neopixel library from just about any arduino, or if you're using a Teensy 3.X, you can drive up to 4000 LEDs with the OctoWS2811 library.

Shameless plug for the system my team built this year: http://hackcasual.io/blingboard
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