I am working on a simple Arduino capacitance meter.
This project uses twp resistors: a 10 kohms resistor for charging and 220 ohms resistor for discharging.
The Arduino is programmed to measure the time constant T=RC and eventually calculate the capacitance.
Now for large capacitors such as a 3900 uf capacitor, the time between the readings took several minutes.
I was wondering if we can fix that buy changing the charging resistor(10 kohms) with a small resistor say 220 ohms or something.