Modern instruments use sensors, analogue and digital electronics, and digital processing to measure almost any kind of physical quantities. Arduino is a very useful and widely used platform to build such systems in a school environment. Since it has analogue voltage inputs, it can be used as a digital voltmeter or even as a chart recorder. However, the ways of ensuring the required level of accuracy or just the right estimation of accuracy are often unknown or misunderstood. In this paper we try to fill this gap to aid reliable school experimentation.

中文翻译：

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来自 Arduino 电压表的可靠读数

现代仪器使用传感器、模拟和数字电子设备以及数字处理来测量几乎任何类型的物理量。Arduino 是一个非常有用且广泛使用的平台，可以在学校环境中构建此类系统。由于它具有模拟电压输入，因此可以用作数字电压表，甚至可以用作图表记录器。然而，确保所需精度水平或正确估计精度的方法通常是未知的或被误解的。在本文中，我们试图填补这一空白，以帮助进行可靠的学校实验。