SmartElex NAU7802 Scale Breakout - 24-bit Precision Load Cell Interface for Arduino & Pi

Weighing to 0.001g accuracy in a maker project is hard - unless you have the right front-end. The SmartElex NAU7802 Scale Breakout uses a 24-bit ADC with built-in PGA and I2C output to interface directly with any standard load cell, no soldering required thanks to the spring-terminal connectors. At Rs.264.10 - 5% cheaper than theengineerstore.in's Rs.278 - it ships 1-5 days from Bengaluru with a full 7-day warranty on manufacturing defects.

Specifications

• IC: Nuvoton NAU7802
• ADC resolution: 24-bit
• Interface: I2C (address: 0x2A, hardware-defined)
• PGA gain: programmable
• Supply voltage: 2.7V-5.5V
• Rejection: 50Hz and 60Hz simultaneous
• Connection: 4-pin spring terminal (no-solder load cell)
• Interrupt pin: broken out

Why choose SmartElex NAU7802 over HX711

Generic HX711 boards have only 12-bit effective resolution and require precise timing from the microcontroller. The NAU7802 provides true I2C output with 24-bit accuracy and hardware filtering - no bit-banging, no missed readings. Spring terminals mean swapping load cells takes seconds, not a soldering session.

Real-world projects

1. Digital Kitchen Scale

Combine with a 5kg load cell and Arduino Nano to build a precision kitchen scale with OLED readout. Pair with our 0.96" OLED Module.

2. Industrial Process Monitor

Weigh dispensed liquid or powder in a production line triggered via I2C from ESP32.

3. Smart Luggage Scale

Battery-powered weight indicator using Raspberry Pi Pico + NAU7802 + e-paper display.

How it compares

HX711 modules cost Rs.80-120 but deliver only 12-bit effective resolution. The NAU7802 at Rs.264.10 is 5% cheaper than theengineerstore.in (Rs.278), gives true 24-bit I2C simplicity, and ships from Bengaluru with COD + UPI.

FAQ

Q: Can I connect two NAU7802 boards to the same I2C bus?
A: No - the I2C address is hardware-fixed at 0x2A. Use an I2C multiplexer (TCA9548A) for multiple boards.

Q: What load cell capacity works with this board?
A: Any standard Wheatstone bridge load cell from 100g to 200kg works. Calibrate in firmware for your specific cell.

Q: Which Arduino library should I use?
A: The SparkFun NAU7802 library is available in the Arduino Library Manager and includes ready-to-run examples.

Q: Is the spring terminal solderless?
A: Yes. Press, insert the wire, and release - no soldering required for the load cell connection.

Q: Is a 7-day warranty on manufacturing defects included?
A: Yes, all SmartElex modules from The Engineer Store carry a 7-day warranty on manufacturing defects against manufacturing defects.

Add to cart for ships in 1-5 days from Bengaluru. COD + UPI accepted. 7-day warranty on manufacturing defects included.

Frequently Asked Questions

Buy SmartElex Scale Breakout - NAU7802 Online in India

Purchase the SmartElex Scale Breakout - NAU7802 online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on SmartElex Scale Breakout - NAU7802 with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy SmartElex Scale Breakout - NAU7802 at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.