Code is mostly written by AI, even README is written by AI. If youre new to programming, I suggest turnig to it for help. I used esp 32 which has D13 pin as analog input. Please note that same pin is digital pin in arduino and doesnt work. I recommend using A0 in arduino.
This project uses current measuring device from aliexpress:
| 0-5V Output, 20mm Hole, DC24V,
DC0-100A DC Current Transducer Transmitter
https://a.aliexpress.com/_ExNHoUH
This Arduino project provides a straightforward and effective way to measure the true Root Mean Square (RMS) value of an analog signal, convert this RMS value into a current measurement based on specific calibration parameters, and finally adjust this measurement with a calibration offset. It's particularly useful for applications requiring accurate current monitoring and calibration against known standards.
- Measures the true RMS value of an analog signal from a sensor.
- Converts the RMS value to a current measurement.
- Applies a calibration offset to adjust the measurement.
- Prints the adjusted current value to the serial monitor with one decimal precision.
- An Arduino board (e.g., Uno, Mega, Nano)
- Arduino IDE for uploading the code to the Arduino board
- An analog sensor for current measurement connected to the Arduino
- A computer to view the serial output
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Setup the Arduino Environment: If you haven't already, download and install the Arduino IDE from the official Arduino website.
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Connect Your Sensor: Connect your analog current sensor to pin A0 on your Arduino board. Note that the code currently specifies pin 13, which is typically a digital pin; you should adjust this in the code to match your setup. also verify that your sensor gives correct output with multimeter before connecting. It should give 0-5v analog signal, about 120mV idle
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edit sketch: change correct pin number used for analog input.
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Upload the Sketch: Open the Arduino IDE, paste the provided code into a new sketch, and upload it to your Arduino board.
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Open the Serial Monitor: With the Arduino connected to your computer, open the Serial Monitor in the Arduino IDE to view the outputted current measurements.
After uploading the sketch to your Arduino, the program will automatically start measuring the current as per the sensor's readings, convert these readings into current values, apply a calibration offset, and print these values to the serial monitor. The calibration offset can be adjusted in the code to match your specific measurement requirements.
- Calibration Offset: Modify the
calibrationOffsetvariable in the code to adjust the calibration as necessary for your setup. - Number of Readings: The
numReadingsvariable determines how many readings are averaged for the RMS calculation. Adjust this number based on your desired balance between accuracy and response time. - analog value calibration: if code gives out incorrect value even when calibration offset is tuned in, you can tweak idle analog value and analog increment. Idle analog value is what sensor is outputtin at no load, increment is how many analog values for one ampere of current.
Contributions to this project are welcome! Feel free to fork the repository and submit pull requests with your enhancements or fixes.
This project is open-source and available under the MIT License. See the LICENSE file for more details.