Settings for multiple variable resistors in a logic probe

I am building what looks on paper like a really sweet logic probe as a first project. It includes 3 variable resistors. The site I got the circuit diagram from is translated into english and doesn't make sense. There is some nonsense about low current measurements.
My question...how do I determine settings for the various resistors?Settings for multiple variable resistors in a logic probe

Also, can I assume VR1 at the top is, by convention, 50K?

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Category: signal Time: 2016-07-28 Views: 0

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