Each 8-pin DIP has two 5×7-matrix, high-visibility LED displays. They bear date codes ... [Michael] figured there would be a serial protocol involved, but which pins? He decided to brute-force ...

But are stencils good for anything else? It turns out they are, if you’ve got some plain old 8×8 LED matrix displays you want to jazz up a bit. In this case, [upir]’s displays were of the ...