Sweat Electrolyte Monitor Patch Kit with Arduino Nano + LED
Build Your Own Wearable Sweat Electrolyte Monitor Patch with Arduino Nano & OLED
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Measure the concentration of sodium and potassium in sweat with a custom ion‑selective electrode patch you build and program yourself. This kit turns an Arduino Nano into the core of a wearable hydration monitor, giving athletes, coaches, and biomedical researchers a hands‑on tool for real‑time electrolyte tracking. Whether you’re validating a sports‑science concept, developing a Smart India Hackathon prototype, or exploring medical‑grade wearables, the project delivers a fully functional data‑logging patch that sticks to the skin and streams readings straight to an OLED display.
What You'll Build
A compact, battery‑powered patch that attaches to the skin and reads Na+ and K+ levels using two analog ISE electrode modules. The Arduino Nano acquires the electrode signals, displays live concentrations on a 0.96‑inch OLED, and timestamps every data point with a DS3231 real‑time clock. All readings save to a microSD card for later analysis, so you can graph hydration trends after a workout or a day in the heat. The entire device fits on a custom PCB you solder yourself and runs off a rechargeable 400 mAh LiPo cell with onboard TP4056 charging.
What You'll Learn
- Analog signal conditioning for low‑noise ion‑selective electrode measurements
- Interfacing multiple I²C and SPI peripherals (RTC, OLED, microSD) with Arduino Nano
- Designing and soldering a wearable prototype on a PCB prototype board
- Implementing power management and battery charging for a self‑contained wearable
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Nano | 1 |
| Analog ISE Electrode Module (Na+ and K+) | 2 |
| DS3231 RTC Module | 1 |
| MicroSD Card Module | 1 |
| 0.96‑inch OLED Display | 1 |
| 10kΩ Resistors | 10 |
| 100nF Ceramic Capacitors | 10 |
| 3.7V LiPo Battery 400mAh | 1 |
| TP4056 Charging Module | 1 |
| PCB Prototype Board | 2 |
| 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
B.Tech ECE and biomedical engineering students tackling final‑year projects or Smart India Hackathon challenges in health‑tech wearables. IIT, NIT, VIT, and BITS Pilani teams who need a ready‑to‑assemble sensor front‑end for hydration studies. ATL tinkering labs that want an advanced biomedical build beyond basic Arduino kits. Coaches and sports scientists at Indian academies experimenting with real‑time electrolyte monitoring during training camps. You should be comfortable with soldering, analog circuits, and Arduino programming.
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 inside the box to chat with the AI companion trained on this project, or drop a message on WhatsApp — a real human will help you within hours, not days.
Do I need prior experience with soldering or analog circuits?
Yes, this is an advanced kit. You’ll solder the electrode modules and supporting components onto a prototype board and must understand basic analog signal conditioning. The included guide and AI companion walk you through each step, but familiarity with a multimeter and oscilloscope is assumed.
Can I wear the patch continuously during exercise?
The prototype design is intended for intermittent sweat sampling. The electrodes require regular cleaning and recalibration, and the adhesive patch must be replaced between uses. It is a research‑grade tool, not a medical device.
How do I calibrate the ion‑selective electrodes?
The project code includes a calibration routine using standard Na+ and K+ solutions (not supplied). You’ll need to prepare or source calibration solutions, then the AI companion will guide you through the two‑point calibration procedure on the OLED interface.
Analog ion-selective electrode array on a skin patch measures Na+ and K+ sweat concentration as proxy for hydration.
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