AC Line Frequency Meter Kit with Arduino Uno
Measure Mains Frequency with 0.01Hz Precision Using Arduino Uno – AC Line Frequency Meter Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
When you plug this meter into a wall outlet, the LCD instantly displays the precise AC line frequency — 50.00 or 60.00 Hz — with a resolution of 0.01 Hz. It's the real-time heartbeat of India's power grid, and you built it yourself. From CBSE physics students exploring alternating current to hobbyists verifying inverter output quality, this kit turns an abstract concept into a tangible instrument you can hold and test anywhere.
What You'll Build
You'll assemble a handheld frequency meter that reads mains AC voltage through a ZMPT101B sensor, processes zero-crossings on the Arduino, and displays frequency accurate to two decimal places on a 16x2 LCD. The device runs on a 9V battery, making it portable for field measurements. The entire circuit fits on a breadboard, and you can later enclose it in a custom case for regular use.
What You'll Learn
- How AC zero-crossing detection works in real circuits, not just in theory
- Arduino interrupt programming for precise timing and frequency calculation
- Interfacing an I2C LCD for smooth, flicker-free real-time data display
- Calibrating a measurement instrument against grid standards and validating accuracy
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ZMPT101B AC Voltage | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is ideal for CBSE Class 11-12 Physics students exploring AC circuits, B.Tech ECE/EEE undergraduates doing power electronics labs, and hobbyists participating in Smart India Hackathon or ATL Tinkering Lab projects. It’s also a perfect first project for anyone curious about grid frequency monitoring, inverter testing, or building real-world measurement instruments with Arduino.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to launch the AI companion trained on this AC Frequency Meter. It will guide you step by step, and you can also reach our team on WhatsApp for quick human help if needed.
Is it safe to connect this kit to mains power?
Yes. The ZMPT101B module provides galvanic isolation and steps down the voltage safely. You will connect its output to the breadboard, not directly to mains. Adult supervision is recommended for builders under 15.
Can I use this meter to check the frequency of my inverter or UPS?
Absolutely. Since it’s battery-powered and portable, you can test any 50Hz or 60Hz AC source — inverters, generators, UPS outputs — and instantly see if they’re within spec.
What if my LCD doesn’t show 50.00 Hz even after wiring correctly?
The AI companion will walk you through calibration: checking the ZMPT101B’s trimmer, verifying your Arduino sketch is set for 50Hz (India’s grid), and testing with a known source. It usually takes only a few minutes.
Zero crossing detector on mains measures AC frequency to 0.01Hz resolution. LCD shows 50.00 or 60.00 Hz.
What's in this kit
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items