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extending distance between arduino and LED strips
April 23, 2016 4:52 AM
In case some of you would like to have your addressable LED Strips a long distance from your arduino or Teensy, I've tested this circuit over a 1000 foot spool of cat-5 wire. You can either put a 5 volt supply where the LEDs are or use the 3 remaining pairs of wire in the cat cable to send 24 volts to a local 5 volt switching regulator. The pinout shown is for the Plastic Dip package. Its different if you use the surface mount version.
April 24, 2016 12:40 AM
Thanks MikeWolf for posting this! A 1000 feet (app. 300 meters) is quite a distance!
I had not heard of the MAX 490 before but now that I have read the spec sheet - I'll DEFINITELY will start playing with those little guys!
April 24, 2016 2:08 AM
The specification for RS-422 is to go 4000 feet. I only had a 1000 ft spool of cat-5 to test with so its what I can confirm will work. I don't show it in the drawing, but its good practice to connect the ground of the arduino power supply to the LED power supply. This can be done with one of the spare conductors of the cat-5. Another thing to note for anyone using a Teensy, which outputs 3.3 volt signals,not 5 volts, The high signal threshold on the 490 is 2 volts, so no additional signal level shifter is necessary.
April 25, 2016 12:41 AM
Awesome! Thanks for posting MikeWolf!