Build Guides
Step-by-step electronics projects with wiring diagrams, component lists, and ready-to-deploy code. Pick a guide and start building.
How to Build an ESP32 Video Doorbell
Build an ESP32-CAM video doorbell with a local Wi-Fi camera feed, physical doorbell button, passive buzzer chime, status LED, and browser live-view page.
How to Build an ESP32 Desk Presence Busy Light
Build an ESP32 desk presence light that shows whether your workspace is free, recently active, or manually set to busy. Includes PIR wiring, OLED status text, LED ring feedback, and complete Arduino code.
How to Build an ESP32 Ultrasonic Parking Sensor
Build a bench-safe ESP32 parking sensor with an HC-SR04P ultrasonic module, SSD1306 OLED, three warning LEDs, and a passive buzzer.
How to Build a CO2 Room Monitor with ESP32
Build an ESP32 CO2 monitor with an Adafruit SCD41 sensor, SSD1306 OLED, shared I2C wiring, warning thresholds, and live temperature and humidity readings.
How to Build a Tiny ESP DeskBuddy with ESP32-C6
Build a small ESP32-C6 touch LCD DeskBuddy with a monochrome animated face, swipeable dashboard pages, Wi-Fi data cards, and printed enclosure.
How to Build One ESP32 Split-Flap Clock Digit
Build one ESP32-controlled split-flap clock digit using a 28BYJ-48 stepper motor, ULN2003 driver, KY-035 Hall sensor, and calibration magnet.
How to Build a Laser Tripwire Alarm Demo with Arduino
Build a classroom-safe Arduino beam-break alarm demo using a low-power laser, LDR photoresistor, 10k resistor, and piezo buzzer.
How to Build a Morning Thermal Printer with ESP32
Wire an ESP32 to a CSN-A2 thermal printer on UART2 (GPIO 4/5) with a dedicated 5 V charger for VH, fetch weather and calendar over Wi-Fi, and print a daily briefing.
How to Build an ESP32 Air Quality Monitor with BME280
Build an ESP32 air quality monitor using a BME280 sensor and SSD1306 OLED display. Shows indoor temperature, humidity, pressure, and a simple comfort status. Complete guide with wiring, code, and assembly.
How to Build an ESP32 Security Camera
Build a small ESP32-CAM security camera with a USB programmer adapter, browser upload, and a local live-view page.
How to Build a Scrolling LED Matrix Message Board with ESP32
Step-by-step guide to building an ESP32 scrolling LED message board using a MAX7219 8x32 dot matrix module. Includes SPI wiring, MD_Parola code, and assembly instructions.
How to Build an ESP32 Pomodoro Focus Timer
Build an ESP32 Pomodoro focus timer with an SSD1306 OLED, KY-040 rotary encoder, piezo buzzer, and WS2812B LED ring. Includes complete code and wiring guide.
How to Build a Touchscreen Chess Game on a Cheap Yellow Display
Build a playable touchscreen chess game on an ESP32-2432S028R Cheap Yellow Display. Includes onboard display setup, touch input, complete code, and browser deploy steps.
How to Build an ESP32 Weather Station with Clothing Advice
Build an ESP32 weather station that fetches Amsterdam forecast data over Wi-Fi and shows simple clothing advice on a Waveshare 1.83-inch LCD. Includes complete code and wiring guide.
How to Build a ClawdBot Tamagotchi with ESP32
Create an ESP32 Tamagotchi-style companion bot with OLED face, buttons for feed/play/sleep, buzzer effects, and a care loop that responds to attention.
How to Build a Cosmic Critter Pet with Raspberry Pi Pico
Create a Raspberry Pi Pico virtual pet with MPU6050, OLED face, WS2812B LED ring, and buzzer. Tilting changes mood, colors, and sounds.
How to Build a Fitness Wristband Prototype with ESP32
Build an ESP32 fitness wearable prototype with MAX30102 heart-rate sensor, MPU6050 motion tracking, and OLED. Includes complete code and wiring guide.
How to Build a Gesture-Controlled Mood Lamp with ESP32
Step-by-step guide to building an ESP32 gesture-controlled mood lamp using an APDS-9960 sensor and WS2812B LED strip. Includes wiring diagram, Arduino code, and assembly instructions.
How to Build a Laser Harp Synth with ESP32
Create an ESP32 laser harp synthesizer using LDR sensors, a piezo speaker, and OLED display. Each broken beam plays a different musical note.
How to Build a Plant Disco Guardian with ESP32
Build an ESP32 plant guardian with soil moisture sensor, WS2812 LEDs, and buzzer. Alerts when dry, plays a disco celebration when watered.
How to Build a Rocket Launch Alarm Clock with ESP32
Create an ESP32 rocket-launch alarm clock with DS3231 RTC, WS2812 LEDs, and buzzer. Alarm triggers a 10-second countdown with liftoff sequence.
How to Build a Self-Balancing Rover with ESP32
Build an ESP32 self-balancing mini rover with MPU6050 IMU, OLED display, and PID control. Complete guide with wiring, code, and assembly.
How to Build an Arcade Reaction Tower with ESP32
Build an ESP32 arcade reaction game with WS2812 LED ring, arcade button, buzzer, and OLED score display. Tests reflexes with random light cues.
How to Build an ESP32 Kids Phone Prototype
Design an ESP32-based kids phone prototype with keypad, screen, speaker, and SOS button. Full wiring diagram, Arduino code, and step-by-step assembly.
How to Build an RFID Treasure Chest with ESP32
Design an ESP32 RFID treasure chest with MFRC522 reader, servo lock, buzzer, and OLED. Valid tags unlock the chest with a success tune.