Deep Sleep on ESP32: Build a Battery-Powered Sensor
An ESP32 running flat out draws 80–240 mA — an 18650 battery is dead in a day. The same chip in deep sleep sips around…
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Fresh DIY electronics tutorials, projects and circuit guides.
ESP32 Wi-Fi Weather Station with DHT22
Take one ESP32, add one DHT22 sensor, and you have a weather station that serves live temperature and humidity to any browser on your…
ESP32 Web Server: Control an LED from Your Phone
The ESP32’s superpower is built-in Wi-Fi, and the most satisfying first project is a tiny web server: open a page on your phone, tap…
Arduino Temperature Monitor with DHT11 and Serial Plotter
Numbers in a serial monitor are fine, but a live graph is better. In this tutorial you will wire a DHT11 temperature-and-humidity sensor to…
Controlling a Servo Motor with Arduino
Servos are the easiest way to add precise motion to an Arduino project. Unlike a plain DC motor that just spins, a hobby servo…
Arduino Ultrasonic Distance Meter with HC-SR04
Want your Arduino to sense the world without touching it? The HC-SR04 ultrasonic sensor measures distances from about 2 cm to 400 cm using sound —…