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Measurement tools

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CatalinaWOW:
There is art to using any of the techniques mentioned above.   With proper technique the digital calipers can do the job.  You can read tutorials but all of the methods will require practice and thought to get good results.  Each has pitfalls that can result in large errors.

rteodor:

--- Quote from: alamwte ---Which tool do you recommand to me ?
--- End quote ---

Milimetric paper, a stand and a lamp or a flashlight at a far enough distance (1,5 ... 2 meters).

eugene:
The OP wants to make a box to put the little PCB into. Not much precision or accuracy is required.

The outside dimensions only need to be accurate enough that the box not be made too small.

The diameter of the mounting holes need to be accurate enough to decide what size screws to use.

The locations of the mounting holes needs to be accurate enough that the screws do not bind. If there is uncertainty, then choose a smaller mounting screw to provide clearance.

This is not a demanding task and can be completed with calipers in less time than it took me to write this post.

OP: post several clear photos of the board flat on a table with a millimeter or inches scale along side. Someone here (maybe me) will determine all of the needed dimensions from the photo.

Also, please state the manufacturer and model of the device. It's not uncommon for the manufacturer to provide detailed drawings of things like this.

alamwte:
@pqass @evb149 @eugene @rteodor @CatalinaWOW @bson @nctnico @Ian.M @RoGeorge @jpanhalt @Domagoj T @eugene
Thank you all to giude me.  :clap: :clap: :clap:
(I had this problem for a long time.)

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