🔍 Product Overview

The ZMPT101B Single-Phase AC Voltage Transformer Module is a compact AC-voltage sensing board built around a precision miniature transformer and amplifier stage. It allows safe measurement of mains AC voltage (commonly up to ~250 V RMS) while providing complete galvanic isolation between the high-voltage side and your microcontroller.

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🚀 Why It’s Ideal for Your Projects

• Safe mains monitoring — The onboard transformer isolates your low-voltage electronics from dangerous AC mains.

• Analog output for microcontrollers — Produces a proportional analog signal that can be read by any ADC-equipped MCU.

• Versatile usage — Ideal for smart meters, power monitoring, automation systems, and voltage-feedback circuits.

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📝 Key Features

• Input capability: Up to ±250 V RMS AC (50/60 Hz typical)

• Output: Analog voltage typically 0–5 V, centered around mid-supply (VCC/2)

• Supply voltage: Typically 5 V DC

• High galvanic isolation (commonly above 3000–4000 V)

• Compact board size (around 50 × 20 mm depending on manufacturer)

• Multi-turn potentiometer for sensitivity and calibration adjustment

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🎯 Typical Applications

• Smart power-monitoring systems

• Over-voltage and under-voltage detection circuits

• DIY energy meters

• IoT systems requiring real-time mains-voltage sensing

• Industrial automation and diagnostics

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✅ Why You’ll Love It

The ZMPT101B module provides a safe, accurate and microcontroller-friendly method to monitor AC mains voltage. With built-in isolation, adjustable sensitivity, and a stable analog output, it’s perfect for everything from hobby energy meters to professional monitoring systems.