The Voltage Detection Sensor Module (25V) is a simple and effective module used to measure DC voltage levels using a microcontroller. It works by scaling down higher voltages to a safe range using a resistor divider, allowing accurate voltage monitoring through an analog input pin. This module is widely used in battery monitoring, power management, and embedded electronics projects.
Core Module Specifications
• Sensor Type: DC voltage detection module
• Measurement Type: Analog voltage sensing
• Maximum Input Voltage: 25 V DC
• Output Type: Analog (scaled voltage)
Electrical & Interface
• Operating Voltage (Logic Side): Depends on microcontroller ADC reference
• Input Voltage Range: 0–25 V DC
• Output Voltage Range: 0–5 V (typical, divider-based)
• Interface Pins: VCC, GND, S (Signal)
• Sensing Method: Resistive voltage divider
Performance Characteristics
• Linear voltage scaling
• Suitable for slow-changing DC voltages
• Accuracy dependent on ADC resolution and calibration
• Stable readings with proper grounding
Physical Characteristics
• Module Type: PCB-mounted voltage sensor
• Compact and lightweight form factor
• Clearly marked input and output pins
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32 (ADC voltage limits must be considered)
• STM32, AVR, PIC microcontrollers
• Raspberry Pi (with external ADC)
Key Advantages
• Simple and low-cost voltage sensing solution
• Protects microcontroller ADC from high voltages
• Easy to integrate with analog inputs
• Ideal for educational and DIY projects
Technical Insights
• Uses fixed resistor divider (commonly 5:1 ratio)
• Calibration improves measurement accuracy
• Not suitable for AC voltage measurement
• Input and ground must share common reference
Applications
• Battery voltage monitoring
• Power supply supervision
• Solar panel voltage measurement
• DIY power management systems
• Embedded diagnostics and testing
Pro Tip
• Calibrate readings in software for best accuracy
• Ensure ADC reference voltage is stable
• Do not exceed 25 V input to avoid damage
• Use short wires to minimize noise
Package Includes
• 1 × Voltage Detection Sensor Module (25V)