This was made from two bits of Perspex that I used my CNC to engrave Open and Closed into then used a string of LED's to edge light them. A short length of 25x15 trunking and hot glue holds it all in place.

A simple three position switch selects Open, Closed and off.

I did say it was simple :-)

DJNPHOTO2 years ago
how deep did you engrave it and what kind of bit did you use
Djandco (author)  DJNPHOTO2 years ago
Hi there,

I built a CNC a few years back that basically has a Dremel attached to it. The bit I used was a sort of cone shaped coarse grinding bit and at high speed on the Dremel but low speed on the CNC it does not melt the plastic.
I also ran the program twice at two cutting depths hence the slight offset on some of the letters.

I have done one free hand but it takes a lot longer to do and if you sneeze half way through.....