Data Logging for Voltmeters: How to Save and Read Data Using an Arduino

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SUMMARY

The discussion focuses on integrating a Produino ST Master Chip 0.56" LED DC 3-Digital Display Digital Voltmeter with an Arduino for data logging. The goal is to achieve a ± 10Hz sampling rate and save the data on an SD card or USB stick for PC access. Key considerations include the lack of digital output from the voltmeter, the use of Arduino's built-in Analog to Digital Converter (ADC), and the potential need for a higher resolution external converter if more than 10-bit resolution is required.

PREREQUISITES
  • Understanding of Arduino's Analog to Digital Converter (ADC)
  • Knowledge of SD card interfacing with Arduino
  • Familiarity with voltage measurement and resolution requirements
  • Basic electronics for creating input attenuators using resistors
NEXT STEPS
  • Research Arduino SD card libraries for data logging
  • Learn about external ADC options for higher resolution voltage measurement
  • Explore creating voltage attenuators using resistors for input scaling
  • Investigate data visualization tools for analyzing logged data on a PC
USEFUL FOR

Electronics hobbyists, Arduino developers, and anyone interested in data logging voltmeter readings for analysis and monitoring purposes.

johnnyhassle
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Attaching a data logging system to a voltmeter:

Produino ST Master Chip 0.56" LED DC 3-Digital Display Digital Voltmeter- Black (DC 0~100V)

Goal: I want to save the data from the voltmeter over time with a ± 10Hz sampling rate, logging this on a SD card or UBS stick, making it able to read the data on a PC.

Question: In what possible ways can I achieve this? Can I possibly use the arduino for this?

Thanks in advance
 
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Apart from the visible display, there appears to be no digital data output from that product.

What voltage range do you need to record? What voltage resolution do you require?

It might be possible to use the Arduino's built in Analogue to Digital Converter.
google ' Arduino ADC '.

If you need more than 10 bit resolution, (about 0.1%), you may need to find a higher resolution external converter for the Arduino.

If you need a voltage range greater than 0 to 5V you may need to make an input attenuator using two resistors.
 

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