#include <LiquidCrystal.h> LiquidCrystal lcd(12, 11, 5, 4, 3, 2); float voltageRMS = 0; float readValue = 0; float Vref = 2.5; // Output offset of ZMPT101B (adjust based on simulation)
// Remove DC offset and convert to RMS float peakVoltage = (maxV - Vref) * (120.0 / 0.6); // Calibration factor voltageRMS = peakVoltage / 1.414; zmpt101b voltage sensor library for proteus
In this post, I’ll walk you through why this library is essential, where to find it, and how to simulate a complete energy monitoring system step-by-step. Before we jump into simulation, let’s recap the hardware. The ZMPT101B is a PCB module built around a precision voltage transformer (ZMPT101B). It takes high AC voltage (up to 250V AC) and outputs a low AC signal (0-5V) proportional to the input. Most importantly, it provides galvanic isolation between the mains side and your microcontroller. #include <LiquidCrystal
delay(500);
Simulating AC mains voltage safely is a nightmare for most hobbyists. One wrong probe, and your $50 USB oscilloscope is toast. Enter the ZMPT101B —a popular, isolated AC voltage sensor module. But how do you test your Arduino or ESP8266 code without frying real hardware? It takes high AC voltage (up to 250V
void loop() // Sample multiple times to find peak float maxV = 0; for(int i=0; i<200; i++) readValue = analogRead(A0); // 0-1023 float voltage = (readValue / 1023.0) * 5.0; // Convert to 0-5V if(voltage > maxV) maxV = voltage; delayMicroseconds(100);
lcd.setCursor(0,1); lcd.print(" "); lcd.setCursor(0,1); lcd.print(voltageRMS); lcd.print(" V AC");