Amplifier
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How to Build a Smart Wireless Doorbell System Using IoT Missing a visitor at the front door usually means missed package deliveries, keeping friends waiting outside, or missing unexpected guests. Standard doorbells only work if we happen to be sitting nearby and the chime is loud enough to hear. If we are stuck in a work meeting, listening to music with headphones, or away from home, it is easy to miss the ring, leaving… |
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Qorvo's QPA9510, A Power Amplifier Supporting GSM, UHF, and FM Bands Sub-1 GHz radio links sit at the core of a wide range of products, including public safety radios, smart utility meters, RFID readers, and vehicle telematics units. Many of these systems now need to work across several regional frequency allocations without a hardware redesign for each market, while still running efficiently on battery power in a compact footprint. Qorvo's QPA9510 power… |
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Build a Smart Cooker Whistle Counter Using ESP32 Almost every kitchen has a pressure cooker, but we've all had trouble handling them. It’s too easy to turn on the stove, get distracted by work, TV, or housework, and forget to turn it off. If we miss a whistle count, food gets burned, utensils get spoiled, and there are chances of accidents in the kitchen. But then again, being in the kitchen and manually counting… |
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How to Build a Smart ESP32 Noise Pollution Monitoring System with IoT Urban areas are now affected by acoustic disturbances; major Indian cities such as Mumbai, Kolkata, and Delhi rank among the noisiest in the world, driven by dense traffic, construction, festivals, and industrial activity. Extended exposure to these noise levels leads to health issues, including disturbed sleep, increased stress, cardiovascular risk, hearing damage,… |
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ESP32-CAM AI Vision Assistant Pendant for the Visually Impaired Moving through unfamiliar environments is a challenging thing for visually impaired people. We have a lot of solutions, from sticks to obstacle-avoidance handheld devices on the market, to solve their problem. In the DIY world, a lot of makers have built obstacle-avoidance sticks using Ultrasonic sensors, IR sensors or even a PIR sensor and different variations of… |
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How to Add a Loudspeaker to LiteWing ESP32 Drone for Wireless Audio Announcement In this project, we upgraded LiteWing, an ESP32-based development drone by adding a lightweight Bluetooth speaker system to extend its capabilities beyond flight. By adding a simple Bluetooth audio setup, the drone can now deliver real-time announcements, voice messages, or music directly from the air without requiring any additional coding. The entire system works… |
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Build an ESP32 Text-to-Speech Using Wit.ai Text-to-Speech, or TTS, is a technology that converts written text into spoken audio. It is widely used in voice assistants, accessibility tools, alert systems, kiosks, and smart devices. Today, ESP32 Text to Speech using AI has become a common approach for adding voice output to small electronic projects. On computers and smartphones, TTS works smoothly because… |
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Build an ESP32 Text to Speech Offline System ESP32 text to speech becomes a really helpful feature that can turn an embedded project from good to really useful. Whether you're building a handheld device, automation panel, safety monitor, or educational tool, implementing text to speech in ESP32 makes your project more accessible and user-friendly. Over time, we’ve tried many different ways to do this. Our… |
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Paralyzed Patient Uses Elon Musk’s Neuralink Chip to Play Games Using Thoughts Rob Grenier became paralyzed after a car accident in 2022. He very recently received a Neuralink brain implant in June 2025 and shared this captivating experience on X, calling it “absolutely amazing”. He was able to move a cursor and play video games using only mental commands. The technology fundamentally is a small implantable chip that’s designed to form a direct communication path… |
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What is Amplitude Modulation? Complete Guide with Formula, Circuit Diagram & Practical Demo Amplitude modulation (AM) was first introduced to enable long-range wireless audio communication, representing a major advancement over wireless telegraphy using spark-gap transmitters. Understanding what is amplitude modulation and how it works is fundamental for electronics engineering students and professionals working with radio frequency circuits. This… |
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How to use nRF24L01 module with Arduino? If you're looking to add wireless communication to your project, the Arduino nRF24L01 module combo is one of the most reliable and cost-effective solutions available. Whether you're building a DIY spy bug, a long-range walkie-talkie, or just want to control stuff wirelessly, the Arduino nRF24L01 setup gives you the flexibility to send and receive data wirelessly over long distances using the 2… |
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Different Types of Transformers: Step-Up, Step-Down & More It is important to know the different types of transformers for electrical engineering applications and to design power systems. Transformers are electromagnetic devices based on the principles of electromagnetic induction discovered by Michael Faraday, and they perform very important functions for power generation, transmission, distribution, and electronic circuits. This large reference… |
