Every Arduino tutorial here is built and tested on real hardware — no untested copy-paste code. You’ll find sensor integrations, motor control, displays, RFID, and complete project builds, each with a wiring diagram and sketch. The boards below are the same pre-soldered Nanos and Megas used in the guides.
Shop the parts used in these tutorials
Arduino HX1838 IR Receiver: Decode Remote Codes
Build an Arduino HX1838 IR receiver reader that decodes any remote into HEX button codes, making it easy to map inputs to...
ESP32 BME280 + ST7735: Wi-Fi Weather Station Display
Build an ESP32 Wi-Fi weather station with a BME280 sensor and ST7735 TFT display to show indoor readings plus OpenWeatherMap outdoor data,...
ESP32 HC-SR501 PIR: Telegram mailbox alerts
Build an ESP32 + HC-SR501 PIR mailbox notifier that sends Telegram alerts when the door opens, helping you avoid wasted trips; parts...
ESP32 vs ESP8266: Pick the Best Board for 2026
Compare ESP32 vs ESP8266 in 2026 to pick the right Wi-Fi microcontroller board based on GPIO, Bluetooth, ADC, cost, and support, with...
Arduino MAX7219 Dot Matrix: Scrolling LED Marquee
Build an Arduino MAX7219 dot matrix scrolling LED marquee for readable signs and status messages using only 3 control pins, with parts...
Arduino IR Obstacle Sensor: Blink LED on Detect
Build an Arduino IR obstacle sensor trigger that blinks the onboard LED and prints Serial alerts using a simple HIGH/LOW output module...
Arduino PCF8574: Add 8 GPIO Pins Over I2C
Build an Arduino PCF8574 I2C GPIO expander project to drive 8 LEDs using only SDA and SCL, freeing pins for bigger builds...
Arduino TXS0108E: Safe 3.3V to 5V Level Shifting
Build a safe 3.3 V to 5 V interface using an Arduino and the TXS0108E 8-channel level shifter, protecting 3.3 V devices...
Arduino MAX3421E USB Host Shield: Read USB Barcodes
Build an Arduino MAX3421E USB Host Shield project that reads a USB HID barcode scanner and prints each scan to Serial for...
Arduino Nano MG995 Servo: High-Torque Position Control
Build Arduino Nano control for an MG995 high-torque metal-gear servo using an external 5V supply and shared ground for stable positioning from...
Arduino RC522: Read RFID Card UIDs via SPI
Build an Arduino RC522 RFID reader project that reads MIFARE card and key fob UIDs over SPI, with simple wiring and Serial...
Arduino SSD1306 OLED: Display Text and Graphics
Wire an Arduino to an SSD1306 0.96 inch I2C OLED and upload a simple sketch to display text and graphics on a...