I created this to toy around with the idea of being able to add lit tiles (see photos) or motors/servos to my terrain - for that, I require 3 poles (+,-, and Signal) currently this is only tiles that offer a straight connection, but more will come.
For the example photo I soldered a programmable LED into the tile, with the LED facing the ground to diffuse the light a bit.
Connector https://www.aliexpress.com/item/1005006531774076.html?spm=a2g0o.order_list.order_list_main.46.21ef1802q6dQDj 3P variety
The author remixed this model.
remixed this so it takes 3-pole magnetic connectors (link in desc), allowing to route electricity & signal