The energy conmpany does not like it when you open up your kWh-meter to connect wires to it. Now we know the formulas to calculate what we consumed in kWh and what our actual usage in Watts is, it is a piece of cake to put it in the Arduino! With the following formula we calculate the current energy consumption in Watts for a given pulsetime, that's one rotation. The shortest possible time we can determine is the time between two turns of the Ferraris disk. To find out what your current energy consumption is you need to divide the kWh by time: 1 kWh after 375 laps.īy counting the revolutions of the disc you can keep track of your total energy consumption. If the C-value is for example 375, this means that you have consumed. The C-value of your kilowatt hour meter indicates what a single rotation means. In this electricity sensing device a metal disk with a black line on it rotates. Virtually every home is equipped with a Ferrarismeter, also called kilowatt hour meter or electricity meter.
