Precision Multimeter with Arduino Uno - 4.5 Digit Kit
Build a High-Precision Multimeter with Arduino Uno - Calibrated 4.5-Digit Kit
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Move beyond generic multimeters. Construct a professional-grade instrument that displays voltage and current with 4.5-digit precision on a vivid TFT screen. From IoT sensor characterization to CBSE practicals, this build delivers measurement confidence you can verify.
What You'll Build
A fully functional 4.5-digit digital multimeter with Arduino Uno at its core. You'll assemble the ADS1115 16-bit ADC for robust voltage measurement, calibrate the ACS712 for accurate current readings, and display all data on a 1.8-inch TFT. Use crocodile-clip probes to measure circuits instantly.
What You'll Learn
- Implement 3-point calibration for the ADS1115 ADC to achieve 0.01V resolution
- Configure and calibrate the ACS712 current sensor for 0-5A range
- Drive a 1.8-inch ST7735 TFT display with SPI from the Arduino Uno
- Solder PCB prototype boards reliably to build a handheld measurement tool
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ADS1115 ADC | 1 |
| ACS712 5A | 1 |
| 1.8in TFT ST7735 | 1 |
| 100k? Resistors | 5 |
| 10k? Resistors | 5 |
| Crocodile Clips | 4 |
| 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
This kit is designed for intermediate makers: CBSE Class 11-12 students pursuing electronics, B.Tech ECE/EEE undergraduates needing a reliable bench multimeter for semester projects, and participants in the Smart India Hackathon prototyping measurement systems. It's also a strong fit for ATL Tinkering Labs and NIT/IIT/VIT/BITS project labs.
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?
Your kit includes a QR code linking to an AI companion trained on this exact multimeter project; you can also message our WhatsApp support for human help within 24 hours.
How accurate is the calibrated multimeter compared to commercial ones?
With 3-point calibration on the 16-bit ADS1115, voltage accuracy is within �0.5% of reading, suitable for lab work and educational use.
Can I measure both voltage and current simultaneously?
Yes, the code displays both readings in real-time on the TFT, with autoranging hints in the build guide so you never get a confusing display.
What if I have no soldering experience?
The kit includes a basic soldering iron and solder wire; the AI companion has a video guide for essential soldering, and the PCB prototype board is forgiving for first-time soldering.
ADS1115 16-bit ADC with 3-point voltage calibration. ACS712 calibrated ammeter. TFT shows 4.5 digit precision.
What's in this kit
- Arduino Uno R3
- ADS1115 ADC
- ACS712 5A
- 1.8in TFT ST7735
- 100k? Resistors x5
- 10k? Resistors x5
- Crocodile Clips x4
- PCB Prototype Board x2
- 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