Electronics > Projects, Designs, and Technical Stuff

New uRuler

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CatalinaWOW:
The things on the German ruler, and to some extent Dave's, would be better served printed single sided on acetate (or a more modern equivalent).  Easier to lay the footprints over the top of a PCB to see what size they are.  Maybe the ultimate version would have several, pinned together at one end like a set of feeler gauges.  That would free up more area to include all the good ideas that everyone has come up with.  And to do things like showing voltage spacings physically, so you could put the ruler over a board and see directly what voltages were supportable.

It would help in resolving a fundamental conflict with this ruler, which is trying to be two things - a measuring device and a pocket reference.

jippie:

--- Quote from: EEVblog on October 19, 2016, 11:41:02 pm ---Other stuff to add/remove?

--- End quote ---

Wavelength in vacuum along the ruler. On the other hand on a 20cm ruler the first tick would be at 1.5GHz. I know what you need: a longer ruler ;-) Anyways, when it comes to tables (which consume a lot of space unfortunately), frequency and time vs wavelength would be nice.

Tables are easy to print on paper or to view on a monitor. I think most practical for such a ruler are different pad sizes, distances, foot prints, Rack Unit heigts, drill sizes for bolts and clearance for nuts, ... that sort of thing.

Or embed a button cell and some different color LEDs with known wavelengths. :scared:

EEVblog:

--- Quote from: jippie on October 21, 2016, 01:19:55 pm ---Tables are easy to print on paper or to view on a monitor. I think most practical for such a ruler are different pad sizes, distances, foot prints

--- End quote ---

I don't understand PCB rules covered in PCB footprints, what real use are they?

JS:

--- Quote from: EEVblog on October 21, 2016, 01:30:02 pm ---
--- Quote from: jippie on October 21, 2016, 01:19:55 pm ---Tables are easy to print on paper or to view on a monitor. I think most practical for such a ruler are different pad sizes, distances, foot prints

--- End quote ---

I don't understand PCB rules covered in PCB footprints, what real use are they?

--- End quote ---

  To have a reference of the real world scale after being working on a scaleless IDE in a monitor or digital datasheet, etc. At least that's for me. I check every once in a while to a real part to realize the actual scale I'm working on.

JS

chickenHeadKnob:

--- Quote from: EEVblog on October 21, 2016, 01:30:02 pm ---I don't understand PCB rules covered in PCB footprints, what real use are they?

--- End quote ---

I have the ADAfruit  ruler and it has a good assortment of footprints. It is somewhat useful when etching your own boards at home to have a professional made board to compare with. The thing I use the most are the hole table/ wire gauge and your existing ruler is  more comprehensive in that regard. Selfishly I would ask you not to include footprints as I already have the Adafruit for that. I do want to order something close to your last ruler so get busy making them! (please!) vox populi has spoken!

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