Measurement of Weak Electrical Signals

Weak electrical signal measurement system design based on Arduino embedded development

Abstract

This paper presents an Arduino-based system for weak electrical signal measurement, addressing low sensitivity and environmental interference. The system combines mechanical amplification with signal conditioning and Arduino-based embedded processing for data acquisition and computation. A normalized algorithm and multi-stage noise reduction methods are applied to improve stability and robustness. The system structure, hardware implementation, software algorithms, calibration methods, and error sources along with uncertainties are analyzed and evaluated, and the system performance is verified through experimental procedures. In addition, a cost analysis is conducted to demonstrate its economic feasibility. Application scenarios and limitations are also discussed. Results show that the system can achieve stable measurement of weak electrical signals with practical value.

Keywords: Arduino; Weak Electrical Signal; Trans-impedance Amplifier; PSD Sensor; Uncertainty Assessment

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Paper document

Project Files

Design documents and engineering resources

Device 3D Model

Device 3D Model

structure.SLDPRT

SolidWorks part file, device three-dimensional model
Device Plan View

Device Plan View

tex.tex

LaTeX source, device layout and dimension annotations
System Circuit Project

System Circuit Project

circuit.fzz

Fritzing project file, system circuit schematic and PCB design
Filter Algorithm Code

Filter Algorithm Code

filter.cpp

Digital filtering algorithm implementation, signal noise reduction and data processing
Experiment Budget

Experiment Budget

expenditure.xlsx

Excel spreadsheet, equipment and budget details
Main Loop Program Code

Main Loop Program Code

loop.cpp

Arduino main loop program, data acquisition and system control