// ブログ & ガイド
読んで、学んで、 作ろう。
Arduino、ESP8266などに関するチュートリアル、配線ガイド、詳細解説。
読んで、学んで、 作ろう。
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Tutorials
ESP32-CAM Project: Wireless Security Camera with Motion Detection
Build your own wireless security camera with an ESP32-CAM and PIR sensor for under $20. Step-by-step guide with code, wiring, and email alerts.
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Tutorials
Raspberry Pi Camera Projects: Security Cam, Time-Lapse, and Object Detection
Three practical Raspberry Pi camera projects: motion-activated security camera, time-lapse video, and real-time object detection with TensorFlow Lite. Step-by-step setup.
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Tutorials
Build an Arduino MIDI Controller: Step-by-Step with Buttons, Pots, and LEDs
Build a custom Arduino MIDI controller with buttons, pots, and LEDs. Complete wiring diagram, USB MIDI code, and DAW mapping guide for your next music project.
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Tutorials
I2C LCD Display Arduino: Wiring, Library, and Custom Characters Guide
Complete guide to using an I2C LCD display with Arduino. Learn wiring, I2C address scanning, library setup, and how to create custom characters with code examples.
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Tutorials
DHT22 Temperature and Humidity Sensor: Complete Arduino Tutorial
Learn how to wire, code, and log data from the DHT22 temperature and humidity sensor with Arduino. Complete beginner guide with library setup and troubleshooting.
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Tutorials
Using a Transistor as a Switch: Arduino Circuit Design Guide
Learn exactly how to use a transistor as switch in your Arduino projects. This guide covers NPN and PNP circuits with schematics, base resistor calculations, and flyback protection.
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Tutorials
Arduino for Beginners: What You Need, How to Start, and Your First Project
Everything you need to start with Arduino: board selection, software setup, and your first external LED blink project with full wiring diagram and code.
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Tutorials
Raspberry Pi Home Automation: Build a Smart Home Hub from Scratch
Build a complete smart home hub with your Raspberry Pi. This guide covers MQTT broker setup, DHT22 and PIR sensors, relay control, and a Node-RED dashboard — all fully local.
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Tutorials
ESP32 WiFi Projects: 7 Practical IoT Builds for Home and Workshop
Build 7 practical ESP32 WiFi projects for your home and workshop. Wi-Fi relay control, MQTT temperature logging, OTA updates, and more with full wiring and code.
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Tutorials
Raspberry Pi Pico Projects for Beginners: 5 Easy Builds to Get Started
Get started with Raspberry Pi Pico using 5 easy MicroPython projects. Includes wiring diagrams, parts lists, and full code for LED blink, potentiometer, buttons, DHT11 sensor, and OLED display.
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Tutorials
7 Segment Display Arduino Tutorial: Wiring, Code, and Multi-Digit Control
Wire and code a 7 segment display with Arduino. Covers single-digit wiring, multiplexing for 4-digit displays, and 74HC595 shift register control.
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Tutorials
Top 10 555 Timer Projects for Beginners (with Arduino Integration)
Ten beginner-friendly 555 timer projects with Arduino integration — from a classic LED flasher to a closed-loop PWM dimmer. Each includes a circuit diagram and step-by-step code.
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Circuits
How Capacitors Work: A Beginner's Guide with Practical Arduino Circuits
How do capacitors work? Build two Arduino circuits to see smoothing and RC timing in action. No physics degree required.
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Tutorials
OLED Display Arduino: Complete Wiring Guide and Code Examples
Step-by-step guide to wiring an SSD1306 OLED display with Arduino. Includes pinout, I2C address detection, library setup, and real code examples for text and sensor data.
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Esp8266
Send HTTP Requests Over LTE with A7670E and ESP8266
AT commands, APN setup, and a 12-step flow to get your ESP8266 online over 4G — no Wi-Fi needed.
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Esp8266
E-Paper Display with ESP8266 — WeAct 4.2" Wiring & Setup
Wire a WeAct 4.2 inch e-paper display to an ESP8266 over SPI and get a persistent image that stays even after unplugging — no power needed.
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Arduino
How to Read a Potentiometer with Arduino (Raw + Percent)
Wire a potentiometer to an Arduino and read its values via serial monitor, including a percent-mapped version for cleaner output.
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Arduino
How to Use a Bluetooth Module with Arduino
A quick guide to wiring the HC-05 Bluetooth module to an Arduino Mega and sending messages from an Android phone over serial.
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Esp8266
I Turned My Old Fan Into a Remote Control Fan (ESP8266 + Relay)
How to add Wi-Fi remote control to an old fan using an ESP8266, a relay module, and a simple HTTP toggle sketch.
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Circuits
555 Timer IC: Build a Simple LED Flasher
Wire up a 555 timer IC to blink an LED — a classic beginner circuit that shows how timing chips work.
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Arduino
GPS Module + Arduino: Does a Cheap Sensor Actually Work?
Testing a budget GPS module wired to an Arduino Mega — from raw NMEA data to parsed coordinates, with real-world signal tests indoors, through a window, and outside.