What is the best way to implement a point on a PCB, where a voltage (e. g. output of a regulator) could be measured with multimeter for the purpose of verification of the assembly or diagnostics in case of malfunction (preferably in Eagle)?
Answer
This is quite a common thing to want to do, and really helpful for checking voltages.
A test point is really just a plated hole, perhaps with some nice labelling. Eagle has a library called testpad which contains holes and pads in all shapes and sizes with a nice schematic symbol.
When placing test points I'd recommend laying them out on a 0.1" global grid which means that if you have several near to each other you can use some Veroboard with pogo pins attached to make a simple test fixture.
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