Comment Comment by pppp Adafruit makes a nice ruler for a reasonable price:https://www.adafruit.com/product/1554as did eevBlog:https://www.eevblog.com/projects/uruler/ parent pppp 9 years ago
https://www.adafruit.com/product/1554
as did eevBlog:
https://www.eevblog.com/projects/uruler/