In this tutorial, I’m going to walk you through how I built my own voice assistant—similar to Alexa or Google Home—using only a Raspberry Pi 5, a USB microphone, a speaker, and an LLM with text-to-speech (TTS) and speech-to-text (STT) support. By the end of this guide, you’ll have a …

Living in Chicago means experiencing sweltering summers and unpredictable temperature swings. That’s why choosing Professional Air Conditioner Installation Services in Chicago is more than just a smart choice—it’s essential for long-term comfort, energy savings, and system reliability. In this comprehensive guide, we’ll walk through everything you need to know, from …

This guide shows how to interface the MH-ET LIVE Scanner V3.0 with Arduino using the UART serial interface. This scanner can read 1D barcodes and 2D codes including QR, and outputs the decoded text through UART or USB.

Ever wanted to make your ESP32 respond to voice commands like “ON”, “OFF”, or “LIGHT”? Thanks to TinyML, we can now run machine-learning models directly on microcontrollers — no cloud needed. In this tutorial, I’ll walk you through building a voice command recognition project using an ESP32, Edge Impulse, and …

Introduction Whenever I peel back the layers of how my Arduino boards actually work, I always end up revisiting one classic topic: CISC vs RISC. When I first heard those terms, I honestly thought they were meant for chip architects wearing lab coats inside semiconductor fabs. But the more I …

The crypto landscape in 2025 is a blend of soaring innovation and tightening rules. While most mainstream exchanges rely on strict “Know Your Customer” (KYC) policies, a significant part of the community still seeks ways to “buy crypto no KYC”—to preserve privacy, speed, and autonomy in a world where digital …

The WeMos D1 R32 is an ESP32-based development board that takes the familiar Arduino Uno form factor. It promises to give makers the power of the ESP32—Wi-Fi, Bluetooth, dual-core processing—while keeping the physical compatibility of an Arduino board. But as many users have discovered, the D1 R32 isn’t a drop-in …

When your fridge stops cooling, it’s stressful. Food may spoil, and you might think the repair will cost a lot. But many problems are simple and easy to fix. Follow these steps to check what’s wrong and see if you can fix it yourself or need a technician.

The ESP32-CAM is a compact yet powerful development board that packs Wi-Fi, Bluetooth, and camera capabilities into one low-cost module. But with its limited pin count and dual-purpose GPIOs, figuring out which pins to use can be confusing—especially for beginners. In this post, we’ll break down the ESP32-CAM pinout, explain …

Locating an ideal international PCB partner would be like locating a needle in a haystack. There are dozens of manufacturers around the world all of whom say that they are quality, fast and affordable, but how can you expect a person to see the truly great one that is more …