Finally, I managed to persuade myself to make a really powerful capacitance meter. This is an autoranged version, which means one does not need to adjust the range settings. Furthermore, the measuring range is quite large, from 5pF all the way to 2600uF. It is all taken care of by the PIC16F873A inside the circuit.
It is based on a very simple circuit analysis principle of charging and discharging of capacitors in an RC circuit.
Autorange Capacitance Meter - [Link]
This project like others capacitance meter that use charging time measurement technique (τ=RC). Circuit is really simple. There are three buttons used. Two of them are used to calibrate capacitance meter in order to remove stray capacitance. Third button is used to save calibration data to EEPROM memory. You can download assembly source code compile and burn to PIC16F873A microcontroller. I guess this is a nice tool that fits in to collection. [via]
Auto-range capacitance meter - [Link]
It is often useful to know the capacitance between conductors such as wires, PCB traces or the legs of a capacitor. Being able to measure such capacitances is a great tool to verify the value of capacitors or other components, to test cables or to analyse circuits.
The Capmeter: measuring capacitances with an AVR - [Link]
If your multimeter doesn’t measure capacitance or you want to have wide auto-range capacitance measurement capabilities then try this project. Capacitance meter measurement range is quite large (from 5pF up to 2600μF) and of course range is selected automatically.
Easy to build auto-range capacitance meter - [Link]