The larger the spheres, the closer the measurement should match the formula, for a certain voltage range, but more on that below. However, if you use sharper electrodes such as needles or rods ...

Voltage is a measure of the difference in energy between one part of a circuit and another. It tells you how much electrical energy has been converted into other forms of energy. Voltage is ...

The chip [Josh] is using is the ATtiny84. The ADC in this chip is usually used to measure an unknown voltage against a reference voltage. The trick [Josh] is using is to do this in reverse ...

“It is common practice in the PV industry to monitor the health of PV systems using their current-voltage (I–V ... of tests on the new methodology by measuring 10 different PV modules ...