25v Voltage detection Sensor Module For Arduino & ESP32

25V Voltage Detection Sensor Module for Arduino & ESP32 The 25V Voltage Detection Sensor Module is a simple and compact voltage measurement module designed for monitoring DC voltage up to 25V using Arduino, ESP32, and other microcontroller development boards. It uses a precision resistor voltage-divider circuit to reduce the input voltage to a safe level that can be measured through an analog input. This module is ideal for projects that require real-time monitoring of batteries, power supplies, solar panels, motors and other low-voltage DC sources. Key Features Measures DC voltage up to 25V Designed for Arduino and ESP32 projects Simple resistor-divider design Analog voltage output Easy connection to microcontroller ADC pins Compact and lightweight PCB No external power supply required for voltage sensing Suitable for battery and power-supply monitoring Easy to integrate into DIY electronics projects How It Works The module uses a resistor voltage-divider circuit to reduce the input voltage before sending it to the analog input of the microcontroller. For a typical 25V module, the voltage is divided by approximately 5:1. Therefore, when the input is 25V DC, the analog output is approximately 5V. Applications Arduino voltage monitoring ESP32 battery voltage monitoring 12V battery monitoring 24V battery monitoring Solar panel voltage measurement DC power supply monitoring Robot battery monitoring Motor voltage monitoring DIY digital voltmeters IoT voltage monitoring systems Electronic protection and monitoring systems Robotics and automation projects Compatible With Arduino UNO Arduino Nano Arduino Mega ESP32 ESP8266 Raspberry Pi projects using a suitable ADC Other microcontrollers with analog input Important Note for ESP32 Users The ESP32 ADC input is generally designed for a lower voltage than 5V. Do not connect the module's maximum 5V output directly to an ESP32 ADC pin unless your particular ESP32 board/circuit supports that voltage. For ESP32 applications, verify the ADC input limits and use appropriate additional voltage scaling if required. Safety & Usage This module is intended for low-voltage DC measurement only. Do not connect it directly to mains AC or voltages exceeding the module's specified input range. For measurements close to 25V, use suitable wiring and verify the actual module's resistor-divider values before connecting it to sensitive microcontroller inputs.