LED
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Product Description
A simple and highly reliable voltage sensor module designed as an electronic brick, ideal for monitoring battery levels and DC voltage rails in Arduino and microcontroller projects. This module operates on the principle of a classic resistive voltage divider circuit, reducing an incoming voltage by a factor of five. This scaling allows standard 5V microcontrollers to safely measure DC voltages up to 25V, and 3.3V microcontrollers to measure up to 16.5V through their native analog-to-digital converter (ADC) pins. Equipped with a standard 3-pin electronic brick interface and an integrated 2-terminal screw block, it provides a stable, hardware-level sensing method for monitoring power sources without complex code or external circuitry.
Pinout / Layout Connections
The module bridges the high-voltage source to your microcontroller through two distinct terminal interfaces:
Input Interface (2-Pin Screw Terminal Block):
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VCC Terminal: Connects to the positive (+) wire of the external DC voltage source being measured (0V to 25V).
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GND Terminal: Connects to the negative (-) wire or common ground of the external voltage source.
Output Interface (3-Pin Male Electronic Brick Header):
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S (Signal) Pin: Outputs the scaled analog voltage signal (0V to 5V or 0V to 3.3V) directly to an ADC pin on your microcontroller.
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+ (VCC) Pin: Unused/Passive on standard voltage divider modules, but can be tied to the controller’s VCC line for terminal uniformity.
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– (GND) Pin: Connects to the common system ground (0V) of the microcontroller board.
Applications
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Battery Capacity Monitoring: Perfect for tracking voltage levels on 12V lead-acid batteries, multi-cell LiPo packs ($2\text{S}$ to $5\text{S}$), and solar power panels.
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Smart Power Supply Feedback: Excellent for implementing safety shutoffs or low-voltage triggers on mobile robotic rovers and field electronics.
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Telemetering Systems: Ideal for building small data loggers that monitor fluctuating voltage lines on remote industrial equipment.
Compatibility
The Voltage Sensor Module scales raw voltage down to safe analog thresholds, making it compatible with any microcontroller featuring an ADC:
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Arduino Board Series (Uno, Mega, Nano, Pro Micro) using standard
analogRead()commands. -
ESP32 and ESP8266 boards (Fully compatible; handles input ranges up to 16.5V when mapping to their 3.3V ADC tolerance).
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Raspberry Pi Pico (Compatible up to 16.5V tracking).
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Standard Industrial PLCs configured for low-voltage analog sensor inputs.
Technical Specifications
| Parameter | Value / Specification |
| Product Type | Resistive Voltage Divider Sensor Module |
| Voltage Input Range | DC 0 V to 25 V (When used with a 5V MCU) / DC 0 V to 16.5 V (When used with a 3.3V MCU) |
| Voltage Detection Resolution | $\le 0.02445\text{ V}$ (When paired with a standard 10-bit Arduino ADC) |
| Internal Resistor Ratios | $30\ \text{k}\Omega$ and $7.5\ \text{k}\Omega$ precise divider path |
| Voltage Reduction Factor | 5:1 |
| Output Type | Analog Voltage Signal (0V to VCC) |
What’s in the Box
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1 x Standard Voltage Sensor Module Electronic Brick with integrated screw terminal block.
