Solder both power and ground busses with thin wires connecting GND to all pixels' - and Vout to all pixels' +. It's easiest to strip two wires and solder them to each hole, since the solder fills up the hole which makes it tricky to solder another wire to.
This guide was first published on Oct 09, 2013. It was last updated on Oct 09, 2013.
This page (Build Circuit) was last updated on Jan 13, 2021.