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Several years ago at DEFCON the badges had LEDs but also had IR LEDs, as well as an IR sensor. I wanted to write a program to flash the LEDs, but wanted groups
by pontifier 8y ago
Several years ago at DEFCON the badges had LEDs but also had IR LEDs, as well as an IR sensor. I wanted to write a program to flash the LEDs, but wanted groups of the badges to synchronise their flashes... It was harder than I thought, and I never did come up with an appropriate solution, though I think about it from time to time.
- Avery3R 8y agoDC22? iirc those ir LEDs were pretty directional
- ignoramous 8y agoMay be you hadn't come across https://ncase.me/fireflies https://ncase.me/fireflies If you look at the news.yc discussion https://news.ycombinator.com/item?id=14452832 https://news.ycombinator.com/item?id=14452832 at least one user had managed to sync LEDs using a similar model.
- pontifier 8y agoWell gee... That probably would have worked... maybe I'll try it again next time I get the chance.
- rhinoceraptor 8y agoMy favorite was the unwieldy vinyl badge and seeing people try to figure out how to attach it to the lanyard... My friend almost lost his at the John MacAfee party when it fell off the lanyard.