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A Capacitance Meter Using STMicroelectronics’ Nucleo Board
- STMicroelectronics’ Nucleo development board is still widely used and is an ideal choice for building a capacitance meter
- The Nucleo board's versatile and open architecture makes it perfect for industrial prototypes, education, and research at universities
- Building a capacitance meter is easy thanks to Nucleo board's analog-signal-reading capabilities
- A capacitance meter is a tool that most designers do not have and it works by measuring the electrical capacitance of capacitors
- To build a capacitance meter, you only need an STMicroelectronics Nucleo F411RE board, a 10-kΩ precision resistor, and a capacitor of unknown value with a capacity between 100 nF and 10,000 µF
- The capacitance meter is built by connecting the components, with the most important work done by the firmware implemented in the microcontroller
- Calculating the capacitance of a capacitor is achieved by monitoring the voltage during charging and measuring the time from when its voltage reaches 1 V until it reaches 2 V
- The firmware program on the microcontroller is simple but includes the conversion formula to calculate the capacity of the component
- Different physical and chemical conditions constantly change the reference system, causing different measurements of the same capacitor to lead to slightly different readings, but with a margin of no more than 1%
- STMicroelectronics’ Nucleo board is a reliable and versatile choice for building a capacitance meter that allows for reliable capacitance measurements of capacitors ranging from 100 nF to 10,000 µF or higher
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