31 篇文章
In-depth analysis of Espressif's ESP32 real-time AI SDK suite (ESP-DL, ESP-SR, ESP-WHO, ESP-NN) architecture and practical applications. From speech recognition to image processing, learn how to deploy AI models on ESP32 with C/C++ and Python code examples, performance optimization tips, and platform comparisons.
A 16-year-old used Claude AI to design a satellite signal receiver prototype and earned $300K. Deep dive into the hardware architecture, BOM, signal processing pipeline, and how AI is reshaping hardware development for makers.
Deep dive into Espressif's ESP-NOW protocol, build a WiFi router-free wireless sensor network with two ESP32 boards in 2026, including Arduino/ESP-IDF code, encryption, 200m tested range and power consumption data.
Arduino zero-basics practical tutorial, covering photoresistor analog signal reading, serial monitor real-time display of light changes, servo wiring and serial control angle. Two classic projects help you quickly master sensor input and actuator output.
A comprehensive guide covering three most practical ESP32 topics: flash timeout and brownout detector troubleshooting, Marlin 3D printer firmware installation, and OpenAI real-time embedded SDK voice interaction practice.
Master the complete configuration process of Jetson Nano from zero to one: system optimization saves 1.6GB memory, Jupyter Lab native and Docker installation, VS Code web version deployment, service auto-start settings, helping you quickly build an edge AI development environment.
A comprehensive guide to the entire PCB design process: using KiCad to draw schematics from scratch, assign footprints, layout and routing, export Gerber files, then dive into four-layer board stackup design, impedance control, crosstalk suppression, and power integrity practice, with common troubleshooting and prototyping checklists.
A complete guide to UART serial communication from principles to practice, covering baud rate calculation, hardware flow control, RS485 half-duplex, Modbus RTU protocol implementation, and ESP32 multi-UART port usage tips.
Build an embedded Linux system from scratch using Buildroot on an Allwinner H616 development board, covering environment setup, configuration, compilation, and flashing. Perfect for hardware enthusiasts looking to get into embedded Linux.
A step-by-step guide to running a TinyML image classification model on ESP32-S3 + OV2640 camera — recognize faces, cats, dogs, and objects entirely offline. Perfect for embedded developers diving into edge AI.
Deep understanding of FreeRTOS task scheduling mechanism, master three scheduling modes: preemptive, cooperative, and time-slicing, with ESP32 practical code to help you easily handle multi-task embedded development.
In IoT projects, WiFi and Bluetooth are sufficient - until you need to cover hundreds of meters or even several kilometers. Farm temperature/humidity monitoring, campus security, reservoir water level monitoring... in these scenarios, WiFi signal? Doesn't exist. This is when LoRa (Long Range) comes in handy. And SX1278 is currently one of the most cost-effective LoRa chips. You can buy a module for 15 yuan on Taobao, add an ESP32 main controller, and build a wireless sensor network covering several kilometers...
Complete beginner's guide to brushless motors BLDC, detailed explanation of ESC working principles, wiring methods, parameter configuration and common troubleshooting, suitable for drone/electric model/DIY enthusiasts
In-depth explanation of ESP32/STM32 low power modes, comprehensive optimization of standby current from hardware to software, extending battery-powered device life from days to months.
In-depth testing of accuracy differences between DHT22 and SHT30 temperature and humidity sensors, including actual measurement data, code examples, and selection recommendations to help you make the right choice.
HC-SR04 ultrasonic distance module advanced tutorial, including accuracy optimization techniques, multi-sensor fusion solutions, temperature compensation algorithms, and practical project cases to help you build a precise distance measurement system.
How to choose MEMS sensors? What are the differences between accelerometers, gyroscopes, and IMUs? This article compares popular models like MPU6050, ICM20948, BMI088, with selection tables and practical code.
What to do when PIR human sensor falsely triggers? This article details sensitivity adjustment, filtering algorithms, installation position optimization to build a stable and reliable human detection system.
Complete practical tutorial on MQ series gas sensors, covering MQ-2 smoke, MQ-3 alcohol, and MQ-7 carbon monoxide detection, including Arduino wiring, calibration methods, threshold settings, and alarm system design.
Detailed guide on Vosk, Sherpa-ONNX and other offline speech recognition engines, implementing privacy-secure local voice control without cloud APIs, suitable for smart home and embedded projects.
In-depth comparison of the pros and cons of solid state relays SSR and mechanical relays, including lifespan testing, switching speed, noise comparison, to help you choose the right relay type
Relay module selection, wiring details, safety isolation design, master the correct posture for controlling 220V high-power devices, avoid electric shock and damage risks
DIY portable oscilloscope with STM32F407 and 3.5-inch TFT screen, cost under 200 yuan, supports 1MSa/s sampling rate, trigger function, waveform display.
Why do we need TensorFlow Lite? Hello everyone, I'm MakerOnsite. Today we're going to talk about how to run AI models on embedded devices. You may have already used TensorFlow to train models, but have you ever thought: how do you put a trained model on a Raspberry Pi, ESP32, or microcontroller to run? This is the problem TensorFlow Lite solves. Traditional TensorFlow models are too large and too slow to run on embedded devices at all. And...
Why do we need TensorFlow Lite? Hello everyone, I'm MakerOnsite. Today we're going to talk about how to run AI models on embedded devices. You may have already used TensorFlow to train models, but have you ever thought: how do you put a trained model on a Raspberry Pi, ESP32, or microcontroller to run? This is the problem TensorFlow Lite solves. Traditional TensorFlow models are too large and too slow to run on embedded devices at all. And...
Why learn driver development? Having worked in embedded development for so long, I've always been working in user space: writing applications, calling libraries, playing with frameworks. But sometimes you'll find that some features just can't be handled in user space—like precise timing control, direct register operations, or hardware interrupt handling. At this point, you need to step into kernel space and write drivers. Many people are intimidated by kernel drivers, thinking 'kernel programming is dangerous, if you mess up the system will crash.' That's true, but it's not that scary. Today we'll start from scratch and write the simplest character device driver to help you take the first step...
After years of hardware development, I'm often asked: 'You've published the schematics and code, others can just copy them, how do you make money?' This is indeed a good question. Today we'll talk about the business model of open source hardware - this business that sounds a bit 'counterintuitive', how it actually works. Let's get to the conclusion first: open source hardware can make money, and can make big money. Don't be fooled by the word 'open source'. Open source doesn't mean free, and certainly doesn't mean charity. Look at these numbers: - Arduino: revenue exceeded 30 million US dollars in 2023, with millions of units shipped globally -...
CAN Bus Analyzer in Practice: Car Diagnostic Tool DIY, Understanding the Network on Wheels. As an embedded developer, have you ever wondered how communication works inside a car? Today we'll build a CAN bus analyzer that can not only read automotive OBD-II data but also be used for industrial CAN network debugging. Spend less than 200 yuan to get the core functions of a professional-grade diagnostic tool! What do you need to prepare? ...
Want to make your own wireless keyboard receiver? Those wireless keyboards costing just tens of yuan on the market actually use NRF24L01+ modules at their core. Today we'll disassemble this black box and build a dual-mode wireless keyboard receiver for less than 50 yuan - it can work as both a regular keyboard and a macro keyboard. The inspiration for this project came from the mess of cables in my workshop. Every time I switch devices, I have to unplug and replug USB, which is annoying. So I decided to make my own, with customizable key mappings - it's just awesome. What do you need to prepare? Items...
Build LoRa point-to-point communication with Arduino Nano + SX1278, from wiring, coding to 800-meter real-world testing, fully reproducing a 192 yuan long-range sensor solution.
Friends doing embedded development all know that I2C protocol sounds simple - just two wires (SDA and SCL) - but when you actually use it, it can drive you crazy questioning your life choices. Device not responding, data reading incorrectly, timing issues... Today I'll demonstrate with a logic analyzer how to catch these strange I2C problems one by one. What do you need to prepare? Items...