Pulsed NMR Relaxometry Probe Kit with Arduino Mega
Pulsed NMR Relaxometry Probe Kit with Arduino Mega — Measure T1 and T2 Relaxation Times
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
This kit equips you to build a working pulsed NMR relaxometry probe that fires an RF pulse into a coil and captures the Free Induction Decay (FID) using the ADS1115 ADC. Fit the exponential decay curves to extract T1 and T2 relaxation times, just like a research-grade spectrometer. Ideal for advanced university labs, research scholars, or professional makers wanting to add NMR instrumentation to their toolkit.
What You'll Build
You will assemble a complete time-domain NMR spectrometer that uses an Arduino Mega to generate RF pulses via the AD9833 DDS, amplify the signal through LM358 op-amps, and switch the coil with IRF540N MOSFETs. The system logs FID traces to a MicroSD card with microsecond timing from the DS3231 RTC, displaying real-time decay curves on the 2.4-inch TFT display. The result is a benchtop instrument capable of measuring T1 and T2 for materials like doped water, glycerin, or mineral oil.
What You'll Learn
- Generate precisely timed RF pulses using the AD9833 DDS and Arduino Mega
- Capture microvolt-level FID signals with the ADS1115 high-resolution ADC
- Fit exponential decay models to extract T1 and T2 relaxation constants
- Design and tune a solenoid RF coil with 50Ω impedance matching for pulsed NMR
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| ADS1115 ADC | 1 |
| AD9833 Signal Gen | 1 |
| LM358 Op-Amp | 4 |
| IRF540N MOSFET | 2 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 2.4in TFT ILI9341 | 1 |
| 50Ω RF Resistors | 5 |
| 100nF Caps | 15 |
| AWG24 Magnet Wire 20m | 1 |
| Neodymium Magnet Block | 2 |
| PCB Prototype Board | 5 |
| 12V 5A 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
This kit is designed for M.Tech and Ph.D. scholars in electronics or applied physics, researchers at IITs, NITs, and central universities, and advanced makers who need a benchtop NMR instrument for teaching or material characterization. It's also a strong foundation project for the Smart India Hackathon hardware track or a final-year B.Tech project in ECE/EEE.
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 access the AI build companion trained on this exact project. You can also reach our team on WhatsApp for hands-on guidance.
Do I need an oscilloscope to verify the RF pulses?
The kit includes a 2.4-inch TFT to display real-time waveforms, but if you want to probe the RF chain, a basic oscilloscope (20 MHz+) is helpful. The AI companion walks you through both scenarios.
How do I calibrate the magnetic field with the neodymium magnets?
The fixed block magnets provide a stable B0 field. The guide explains how to position the sample coil and calculate the Larmor frequency, then trigger the DDS at that exact frequency.
Can I measure T1 of solids or only liquids?
This probe is optimized for liquid samples in a 5 mm NMR tube. Solids have extremely short T2 times that the ADS1115 sampling rate may miss. The kit's design focuses on benchtop liquid-state relaxometry.
RF pulse into coil. ADS1115 captures FID decay. Fits T1 and T2 relaxation times for NMR spectroscopy demo.
What's in this kit
- Arduino Mega 2560
- ADS1115 ADC
- AD9833 Signal Gen
- LM358 Op-Amp x4
- IRF540N MOSFET x2
- DS3231 RTC
- MicroSD Module
- 2.4in TFT ILI9341
- 50Ω RF Resistors x5
- 100nF Caps x15
- AWG24 Magnet Wire 20m
- Neodymium Magnet Block x2
- PCB Prototype Board x5
- 12V 5A 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