der_wille_zur_macht
Team RC
Any device capable of generating a PWM signal lower than 1khz in frequency and an "on" voltage between 2.4v and 25v will work fine. That leaves you with a VAST range of choices - all sorts of timers, microcontrollers, AD converters, purpose-build PWM generators, fan controllers, even other LED drivers. I mentioned the two specific methods above because that's what I have experience with.
If anyone else reading this has specific ideas, please share!
