Magnetic Field Visualiser Kit with Arduino Mega + Sensor
Magnetic Field Visualiser Kit: Map Invisible Fields with Arduino Mega & 8x8 Hall Sensor Array
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Ever wondered what the magnetic field around a DC motor, solenoid, or even a simple bar magnet really looks like? This kit brings that invisible world to life. You’ll build an 8x8 grid of Hall effect sensors that measure flux density at 64 points simultaneously, translating raw signals from four multiplexers into a vivid colour heatmap on a 1.8-inch TFT display — a tool as useful for a physics lab as it is fascinating to build.
What You'll Build
You’ll construct a compact scanning array that captures magnetic field data and instantly paints it as a colour-coded map. Whether you hold it over a motor housing, place it near an electromagnet, or sweep it across a permanent magnet, the display reveals the field’s shape, strength, and symmetry. The final instrument is a portable, battery-powered mapper that makes electromagnetism tangible.
What You'll Learn
- Read an 8×8 matrix of analog Hall sensors using just 8 Arduino Mega pins by cascading 74HC4051 multiplexers
- Calibrate Hall effect sensors for consistent flux density measurements and minimise cross-talk
- Program the Arduino Mega to sample, process, and map real-time data onto an ST7735 TFT colour display
- Analyse heatmaps to identify magnetic pole positions, field orientation, and anomalies in motors and solenoids
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| A3144 Hall Sensor | 8 |
| 74HC4051 Mux | 4 |
| 1.8in TFT ST7735 | 1 |
| 10kΩ Resistors | 15 |
| 100nF Caps | 10 |
| PCB Prototype Board | 3 |
| 9V Battery Snap | 1 |
| Soldering Iron | 1 |
| Solder Wire | 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
Intermediate makers, CBSE Class 11–12 physics students building investigatory projects, and B.Tech ECE/EEE undergraduates needing a practical tool for electromagnetics labs. It’s also a strong offline map‑and‑sense project for ATL Tinkering Labs, Smart India Hackathon hardware tracks, or IIT/NIT mini‑project submissions where demonstrating real‑time sensor fusion earns marks.
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?
Open the AI companion through the QR code – it can walk you through every multiplexer connection and calibration step. If you prefer, message us on WhatsApp and a Compoden engineer will reply within hours.
Can this kit measure the field of an electromagnet?
Yes. The Hall sensors respond to both permanent magnets and electromagnets. You can sweep the grid over an energized coil or solenoid and watch the heatmap change as you vary current.
Do I need to solder everything myself?
The kit includes a soldering iron, solder wire, and prototype boards. You’ll solder the sensor matrix, multiplexer circuits, and TFT connections — a perfect hands‑on experience that teaches reliable prototyping.
What Arduino code and libraries do I need?
The AI companion provides complete, commented code for the Arduino Mega, including the ST7735 and multiplexer control logic. You’ll use the Arduino IDE and standard Adafruit libraries — no complex toolchain required.
8x8 array of Hall sensors maps magnetic field of motors, solenoids and magnets on TFT heatmap.
What's in this kit
- Arduino Mega 2560
- A3144 Hall Sensor x8
- 74HC4051 Mux x4
- 1.8in TFT ST7735
- 10kΩ Resistors x15
- 100nF Caps x10
- PCB Prototype Board x3
- 9V Battery Snap
- Soldering Iron
- Solder Wire
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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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