LED "reaction time"
May 28, 2010
I'm thinking of using a bunch of LEDs for a secret project. Here's the catch: they have to be able 'flicker' too quickly for the human eye to see.
How quickly do LEDs go from off to on? Is there any delay - do they have to 'warm up' like incandescent light bulbs? Realize a half second delay is way too much for the project I have in mind. Are there any fast-acting LEDs out there? Or is it virtually instant, only hindered by the speed of the electrons through the wire?
also, while I'm talking about LEDs, what's the simplest way to control a whole bunch of them? Is there any serial driver that can control a whole bunch (upwards of 32 eventually but 18 for now as proof of concept) of LEDs independently of each other? Bonus points for scalability.