Precision Magnetometer Test Bench with Arduino & Helmholtz Coils Kit
Build a Precision Magnetometer Test Bench with Arduino & Helmholtz Coils
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Assemble a three-coil Helmholtz system that cancels Earth's magnetic field and generates calibrated test fields. Hook up the QMC5883L compass as the device under test, monitor current via INA219, and read field strength on the OLED in real time.
What You'll Build
Wind two coils to cancel Earth's field, then a third to impose calibrated fields. The Arduino drives the LM317 current source, with OLED readout and INA219 current monitoring. You'll end up with a compact magnetic test chamber for profiling any I2C magnetometer.
What You'll Learn
- Design and wind Helmholtz coils for uniform magnetic field generation
- Program Arduino to control coil current and read I2C sensors (QMC5883L, OLED, INA219)
- Calibrate a Helmholtz system to cancel ambient magnetic noise
- Characterize magnetometer sensitivity, linearity, and saturation
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| QMC5883L Compass | 1 |
| INA219 | 1 |
| LM317 Regulator | 1 |
| 10k? Potentiometer | 1 |
| 0.96in OLED | 1 |
| AWG24 Magnet Wire 50m | 1 |
| 100nF Capacitors | 10 |
| PCB Prototype Board | 3 |
| 12V 2A PSU | 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
Perfect for B.Tech ECE/EEE students tackling sensor calibration projects, Smart India Hackathon participants, and research enthusiasts at IITs/NITs/VIT. If you've struggled with ambient magnetic noise during testing, this kit provides the controlled environment you need.
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 to access your AI build companion, trained on this exact kit, or reach out via WhatsApp for human support.
Can I test magnetometers other than the QMC5883L?
Yes. The Helmholtz coils produce a uniform field suitable for any I2C magnetometer with 3.3V logic, like HMC5883L or LIS3MDL.
Do I need an oscilloscope or external instruments?
No. The INA219 measures current precisely, and the OLED displays real-time field values. A multimeter is helpful but not required.
What's the maximum field strength this kit can generate?
With the 12V PSU and LM317 current up to 1.5A, a coil of 100 turns can produce roughly 1.5 mT, depending on your winding diameter. You can tweak parameters for higher fields.
Two coil pair cancels Earth field. Third coil applies calibrated field. QMC5883L measures sensor under test.
What's in this kit
- Arduino Uno R3
- QMC5883L Compass
- INA219
- LM317 Regulator
- 10k? Potentiometer
- 0.96in OLED
- AWG24 Magnet Wire 50m
- 100nF Caps x10
- PCB Prototype Board x3
- 12V 2A PSU
- 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