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Practical tool supports harmonization and quality improvement in vitamin D testing

Accurate laboratory results are essential for clinical decisions—but every measurement carries some uncertainty.
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Alternators: How They Work, Why They Fail, and How To Test Them

The alternator is a device that keeps your car’s electrical system running once the engine is on. It’s essentially a small generator that converts mechanical energy into electricity, bolted to the ...

I tried a unviersal battery tester from Amazon, and it's already saving me money

This universal battery tester couldn't be easier to use, and is a great way to determine which ones are still good.

If you use batteries, this universal tester can save you hundreds of dollars

This universal battery tester couldn't be easier to use, and is a great way to determine which ones are still good.

How To Use Harbor Freight's At-Home Back Probe Auto Testing Kit

The Harbor Freight MADDOX back-probe kit lets DIYers test automotive sensors safely. Just insert between wire and insulation, ...
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Using isolated ADCs and an XNOR logic gate as a multiplier to measure active power

Find out how a digital technique performs multiplication on two bitstreams and avoids the cost of the analog multiplier.