GPS-Disciplined Frequency Standard Kit with Arduino Uno & DS3231
Build a GPS-Disciplined Frequency Standard
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn a basic Arduino Uno into a laboratory-grade frequency reference by disciplining a DS3231 real-time clock's oscillator with the 1-pulse-per-second output of a NEO-6M GPS module. This project lets you compare oscillator stability, measure drift, and log timing data-ideal for engineering students exploring precision timing, metrology, or radio hardware validation.
What You'll Build
You'll assemble and program a GPS-disciplined frequency standard that outputs a highly accurate 1 Hz and 32.768 kHz timebase. The onboard OLED reports live PPS lock status, frequency error in parts per million, and Allan deviation estimates. A microSD module logs long-term phase comparisons between two DS3231 oscillators, letting you quantify short- and long-term stability just like in a professional lab.
What You'll Learn
- Capture and debounce the NEO-6M GPS 1PPS signal with sub-microsecond precision using Arduino interrupts
- Implement a proportional-integral control loop to steer the DS3231's internal oscillator toward GPS time
- Use the ADS1115 16-bit ADC to sample beat-frequency signals from two oscillators for direct phase comparison
- Calculate Allan deviation, frequency offset, and drift rate from logged phase data to characterize oscillator stability
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| NEO-6M GPS | 1 |
| DS3231 RTC | 1 |
| ADS1115 ADC | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7k? Resistors | 5 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| 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
Designed for advanced B.Tech ECE/EEE students, M.Tech researchers, and participants in Smart India Hackathon or technical paper contests who need hands-on exposure to precision timing systems. If you're at an IIT, NIT, VIT, or BITS campus lab, this kit gives you a self-contained platform to demonstrate GPS-disciplined oscillator performance without expensive equipment.
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 launch the AI companion, which walks you through every solder joint, code upload, and calibration step. WhatsApp support is also available for direct troubleshooting.
Can I use this to calibrate my lab's frequency counter?
Yes. The disciplined DS3231 provides a 1 Hz and 32.768 kHz reference with sub-microsecond drift per day, suitable for checking the accuracy of standard frequency counters and function generators.
Do I need an oscilloscope to see the signals?
The ADS1115 ADC digitizes the beat note for direct analysis, but connecting a scope to the test points lets you observe the phase comparison waveform in real time-useful for visual alignment.
Is soldering required, and are tools included?
Yes, the kit includes a soldering iron and solder wire. You'll solder all components onto the prototype boards; full assembly diagrams are provided in the companion guide.
Pet - GPS PPS signal disciplined DS3231 provides frequency standard for comparing oscillator stability.
What's in this kit
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