I 3d printed the traffic lights, except for the brass tube. An Arduino Nano changes the lights. Since taking the picture, I braided the wires so they’re not such a mess.

Very nice Tom. Is that PLA? ABS? PETG? Will you be setting these outside on ground?

Actually, I made them for a how-to article on using Arduinos. Arduini?

They’re printed of ABS. Leeloo, my printer works pretty well as long as I don’t try to use BOTH extruders. I can print with either, but if I include parts of two different colors in one print, I get a tangle of plastic threads.

Very cool. I assume they are synchronized?

Tom, very nice ‘highlighting’ for a road intersection…

Burl Rice said:

Very cool. I assume they are synchronized?

Of course!

Working on a grade crossing now. Arduino, IR detectors, servos, LEDs…