After creating the supercapacitor device, I want to connect a professional device to its terminals and measure the capacitance in Farads. Is there such a device or how can I measure it?
You can measure the capacitance of a large capacitor using the formula: C=U*q [1F=1V*1C] and q=I*t [1C=1A*1s] We make one of these patterns: C=U*I*t [1F=1V*1A*1s] So, after charging the capacitor to the rated voltage, we need to assemble a circuit in which we can discharge, for example, through a classic light bulb with a similar operating voltage. In this circuit we record: Capacitor voltage U [V] Circuit current I [A] and circuit operating time t [s] We will get voltage and current curves and discharge time. The fastest result will be obtained if we multiply the average voltage [V] with the average current [A] and time [s]. For example, during 1000 seconds the average voltage was 1.5V and the average current was 0.1A. So 1000*1.5*0.1 = 150F. The most accurate can be calculated by analyzing the area under the voltage and current curves, i.e. by calculating the derivative (integrating) of the voltage function multiplied by the derivative of the current function over time. However, this requires prior elaboration of the equation of the resulting functions. In practice, therefore, it is enough to take the average values in the selected time.
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