It can be done with an 8MHz Arduino using the fastled library. There's always the WS2801 that uses a clock line making time pretty much irrelevant. In a side note, someone got the raspberry pi to drive them using some kind of "abuse/misuse" of the SPI interface. On Tue, Jan 22, 2019, 18:20 Nicola Perotto Hi Josh et all, > some years ago I did it with a PIC 18f26k22 at 64MHz (internal 16 MHz * 4 > PLL) > driving 100 led. > I used the SPI module. > > Nicola > > > On 23/01/2019 00:40, Josh Koffman wrote: > > On Thu, Jan 17, 2019 at 9:05 PM RussellMc wrote: > >> On Sat, 16 Aug 2014 at 05:15, Josh Koffman wrote= : > >>> ... in SPI mode to control the LEDs, using some clever ideas I picked > up > >>> here: https://www.insomnialighting.com/products/rgbsmdws2811.html . > >> DEad link. > >> Other pages refer to the same URL so may have been altered or removed? > > I did write that email 4.5 years ago, so I can't say I'm too > > surprised! I remember I did manage to make it work, but I ended up > > moving to an ARM chip to do useful stuff. At the time I was just > > curious if it was even possible. It was! > > > > Josh > > -- > > Nicola Perotto - NP Engineering > Sistemi Informatici ed Elettronici > skype: nicolap > mob IT: +39 335 7162 582 > mob HU: +36 30 417 3780 > tel: +39 06 916 502 732 > fax: +39 0439 633 1191 > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .