fresh paint :: a magnetic + conductive ink LED display

A few months ago I visited Pumping Station: One where I met William McShane and saw his magnetic + conductive paint LED display. On the video above William explains how it works. This was recorded with my phone so the audio isn’t great, but here’s a summary:

The display is first covered with a layer of magnetic paint and then coated with regular paint. William then drew the circuit traces with conductive paint. The LEDs have a magnet attached to each leg, so they will stick to the display when placed over the traces.