Voltmeter and Ammeter

This project developed a voltmeter and ammeter capable of detecting voltages from 0-30V and currents from 0-3A, based on a CW32 microcontroller. The core function of the system is to acquire voltage and current signals via an ADC (Analog-to-Digital Converter) and then accurately process and display these signals. To improve measurement accuracy, the project employed a calibration data method to calibrate and process the acquired raw data, thereby reducing errors and improving the accuracy of the measurement results.
In terms of hardware, the voltage and current detection ranges are 0-30V and 0-3A, respectively, covering the needs of most everyday applications. The system utilizes a high-precision ADC module to convert analog signals into digital signals for subsequent software processing. The software relies on the powerful processing capabilities of the CW32 microcontroller, combined with calibration data, to correct the acquired digital signals, ensuring the accuracy and reliability of the final displayed voltage and current values.
The calibration process involves acquiring multiple known voltage and current values, recording the corresponding ADC values, and generating a calibration curve or lookup table. During actual measurement, the system interpolates or corrects the raw data based on the values ​​acquired by the ADC, referencing the calibration data, thereby outputting accurate measurement results. The entire process ensures that the system maintains high-precision measurement performance under various environments and conditions.
Furthermore, the system features an intuitive user interface that displays voltage and current values ​​in real time and provides basic alarm and protection functions, guaranteeing both safety and ease of use.
In summary, this voltmeter and ammeter project fully considers measurement accuracy, system stability, and user experience in its design, making it suitable for voltage and current monitoring needs in a variety of applications.