For transmitting the WS2812 one-wire protocol over long distances via CAT5+ "Ethernet" cables.
Note: Even though this uses Ethernet cables, it is NOT compatible with Ethernet.
DO NOT CONNECT TO ANY NETWORK EQUIPMENT
Receiver: R1 is 120Ω, R2 & R3 1kΩ, R4 470Ω.
Driver: R1 is 120Ω.
(C) by Tobias Theuer for synyx GmbH & Co KG. Licensed CC-BY 4.0, see LICENSE or this website.