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The second video is about accurate measurements. It shows surprisingly accurate, inexpensive five-digit voltmeter modules. It explains what determines the accuracy of digital multimeters. It shows how to improve the accuracy of measurements taken with inexpensive digital multimeters. Description of the voltage and current measuring adapter: https://piotr-gorecki.pl/y007 Description of the "cheat" module: https://piotr-gorecki.pl/e050 More articles about accurate measurements: https://piotr-gorecki.pl/kategorie/ka... Support me - subscribe to the magazine Zrozumieć Elektronikę through Patronite: https://patronite.pl/Zrozumiec-Elektr... More information about me and the magazine I currently publish: https://piotr-gorecki.pl