Arduino Leonardo USB HID: Build a Foot Pedal Keyboard
Build an Arduino Leonardo USB HID foot pedal keyboard that sends Page Up and Page Down keystrokes for hands-free control on PC...
Arduino PN532 NFC/RFID: Read, Write, Build Wallet
Build an Arduino PN532 NFC/RFID reader-writer with a 1602 LCD, then store packed-BCD credits on a MIFARE tag for an electronic wallet...
Arduino Nano MAX485: Build a Modbus RTU Slave
Build an Arduino Nano Modbus RTU slave using a MAX485 RS485 module, then read and write holding registers from a PC master...
Arduino LCD2004 I2C: Hello World on 20x4 Display
Build an Arduino LCD2004 20x4 I2C display that prints Hello World using only four wires, ideal for menus and sensor readouts with...
Arduino UNO SSD1306 OLED: Wire and Display Text
Wire a 0.91 inch SSD1306 128x32 I2C OLED to an Arduino UNO and display crisp text using U8g2, with a simple four-wire...
Arduino ULN2003 Stepper: One-Revolution Control
Build an Arduino-controlled 28BYJ-48 stepper motor project with a ULN2003 driver and get precise one-revolution motion you can repeat every time from...
Arduino Nano Soil Moisture Sensor: Auto Plant Watering
Build an Arduino Nano automatic plant watering system using a soil moisture sensor, HC-SR04 tank-level lockout, and a 5V pump for safer...
W1209 Thermostat + TEC1-12706: Mini Fridge Cooling
Build a thermostat-controlled mini fridge using a W1209 controller and a TEC1-12706 Peltier module for simple, solid-state cooling with ShillehTek parts.
ESP8266 WS2812 Ring: NTP-Synced NeoPixel Clock
Build an ESP8266 D1 Mini clock with a 24-LED WS2812 NeoPixel ring that syncs time over NTP, giving an always-accurate, colorful desk...
ESP32 DHT22 BMP180: Live Blynk Weather Dashboard
Build an ESP32 weather station with DHT22, BMP180, and SI1145 sensors that streams six readings to Blynk with live web and mobile...
Arduino Reed Switch: Build a Door Alarm
Build an Arduino reed switch door alarm that beeps when a door opens, using a magnetic sensor and buzzer with simple wiring...
ESP8266 SW-420: Build a WiFi Fish Bite Alarm
Build an ESP8266 + SW-420 WiFi fish bite alarm that detects vibration and alerts an Android phone via HTTP polling, using parts...