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DIY Batteryless NFC Business Card

NFC (near field communication) is a short-range wireless technology that enables data exchange between two devices placed within 4cm of each other. In an...

IoT Device Health Monitoring Over MQTT

IoT devices are widely used to monitor and control physical systems such as lights, fans, motors, and industrial equipment. This system extends that capability...

IoT-enabled Smart Weighing Scale that Talks, Calculates, and Keeps Track of Sales

A smart talking grocery scale is an advanced digital weighing scale designed for small shops, grocery stores, and home use. It accurately measures the...

IoT Relay To Control Appliances Through The Internet Using Smartphone

Electrical appliances such as lights, fans, air-conditioners, TVs, and water pumps are typically operated using manual switches. This system enables these appliances to be...

Generative AI Smart Speaker

Smart speakers such as Alexa, Google Home, and Apple Home have transformed how people interact with technology, enabling voice-based control of smart devices, instant...

Compact Robotic Platform With Motor Driver On Chassis PCB

An N20 motor is a compact DC geared motor widely used in robotics and DIY applications. By combining a small DC motor with an...

Smart Power Cut-Off Timer for Chargers, Pumps & Home Appliances

In today’s fast-paced life, we often leave our mobile chargers, Laptop chargers or small appliances plugged in longer than necessary, especially during sleeping. This...

AI Hand Gesture Controlled Mini Robot

Controlling a robot's direction, speed, individual wheel movement, and more via a single FPC wire makes the overall design compact and efficient. The system...

Run LLM Locally on Raspberry Pi: No API, Free & Offline

In this guide, you’ll learn how to build your own local AI system using lightweight LLMs, AI agents, and affordable hardware like a Raspberry...

Battery Pack Balanced Cell Charge Monitoring System

Balanced charging of each cell in a battery pack is critical to meeting system requirements and maximising lifespan, while continuous monitoring of temperature, current,...

Portable Ultrasonic Trench Logger For Optical Fibre Cable

In modern telecom infrastructure deployments, optical fibre cable (OFC) is typically laid in underground trenches, where maintaining the specified trench depth is critical for...

This IoT Project Tracks Nuclear Radiation Live

Nuclear leakage detection and radiation monitoring have become critical as the world generates increasing amounts of nuclear waste. Almost every country produces nuclear waste,...

Energy Monitoring in Real Time with IoT

Earlier, we designed a smart energy meter that used a current sensor to measure current. In that version, we manually set the voltage range...

₹500 Blind Stick Without Code

The Blind Stick is a low-cost assistive device designed to help visually impaired individuals detect obstacles and navigate safely. It uses an infrared (IR)...

I Turned My Raspberry Pi into an AI agent with OpenClaw That Can Control Apps, Shop & Automate Tasks (OpenClaw Guide)

The openClaw and AI agents represent a revolutionary advancement in AI. These agents can now perform real-world tasks beyond mere answering; they can also...

Solar Energy Harvesting Circuit

Summary: A low-light solar energy harvesting system using the LTC3105 with built-in MPPT can efficiently extract power from indoor ambient light (as low as a...

I Turned Raspberry Pi into a QR Code based Entry System with Auto ID Cards

QR codes are widely used in entry and exit systems for various events to monitor the number of participants and ensure that only authorized...

30 Rupees CAN Bus Transceiver Design 

Transreceiver plays a crucial role in CAN bus communication, transmitting data from the MCU to the CAN network. While most MCUs, such as the...
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