By now most of us should be used to backlit LEDs, in which a bare board with no copper or soldermask as an LED mounted on its reverse side to shine through as if with a diffuser. [Wim Van Gool] has created such an LED display with a twist, instead of reverse mounted LEDs his Shitty Add-On for Area3001 hackerspace in Leuven, Belgium has a set of WS2812 addressable LEDs shining upwards through a void in a stack of PCBs to the diffuser. The effect is of something that looks about the size and shape of a Kit-Kat finger with a glowing hackerspace logo on the front, and it breaks away from the SAO norm.

Full details are on the GitHub repository for the project, in which we find both large and small takes on the same idea. It appears that there is no onboard processor and that the WS2812s are driven from the host badge, but that doesn’t take away from the ingenuity of the design.

The through-PCB diffuser seems to be the badge must-have of the moment, we’ve seen quite a few such as the recent Numberwang badge. That’s the exciting thing about badge design though, one always knows that there will be a new twist along in the next crop of badges, to keep everything fresh.