binary feeler gauge

In most cases a vernier scale is everything needed for taking measurements, however sometimes it’s not the best instrument (e.g. finding out the perfect hight for the fix of a wobbly table) and inserting something with just the right height into a gap between objects would be a much better solution for measurement.

The following can be adjusted:
* unit type (1 mm, 100 µm or both)
* hight of feeler (in 2^n so n=0 -> 1, n=1 -> 2, n=2 -> 4, etc.)
* case (if you want one)
* feeler (generate one or all up to the selected number)

Every feeler has zero or more holes. The number stands for 2 ^ number of holes in the selected unit type. So no holes means 2^0 = 1 unit (1 mm or 100 µm); 1 hole means 2^1 = 2 units; 2 holes mean 2^2 = 4; etc.

* 0 holes = 2^0 = 1
* 1 hole = 2^1 = 2
* 2 holes = 2^2 = 4
* 3 holes = 2^3 = 8
* 4 holes = 2^4 = 16
* ...
* n holes = 2^n

For the measurement select the highest feeler that fits, add the second highest that fits, etc. Then add the numbers