As an early lab project, I'm designing a fairly simple piece of test gear whose purpose is to show the voltage at a probed point in a circuit, along with the current going through a tap in the circuit at that point. This is useful for a lot of purposes -- most of the things I currently use a multimeter to measure. As a simple voltmeter it is therefore quite useful... and I am planning to support two such measurement units per "box". And since I will doubtless build a couple of them, I'll have the ability to display data on lots of circuit points simultaneously.
Hooking up multimeters to show both current and voltage is possible, but it is a bit unwieldy. So this bit of gear will make that nice and simple.
I would like to get as high accuracy as I can (because high precision is cool and sometimes very helpful). And I want to get the current side at least to accurately produce readings down to very low currents -- something that is very useful for measuring the power draw of integrated circuits, etc.
For displaying results, I want to use a small LCD screen and get it to look nice.
Design to follow soon!
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