Arduino projects, tutorials and guides you can build with parts from Arduino Corner.
Both the SG90 and the MG996R are hobby servo motors you can control from a single Arduino pin. But one is a tiny 9-gram plastic servo and the other is a beefy metal-gear motor with roughly five times the torque.…
The Arduino Uno is the classic learning board. The ESP32 is a far more powerful chip with WiFi and Bluetooth built in. They look similar, but they suit very different jobs — and picking the wrong one makes a project…
The Arduino Uno and Nano confuse almost every beginner — and the surprising truth is that they run the same microcontroller (the ATmega328P) with the same 5V logic, the same amount of memory and, for the most part, the same…
Nobody wants to touch a bin lid. This one opens by itself: an HC-SR04 ultrasonic sensor on the front watches for a hand, and when something comes within range a servo lifts the lid, holds it open while you drop…
Most project boards get looked at. This one gets played. The Arduino flashes a colour sequence, you repeat it on the matching buttons, and every round adds one more step. Get it wrong and the buzzer says so. It is…
Both switch a light when someone walks in, but they suit different rooms. A 30-second way to decide — plus the wiring for each and the blind spots nobody mentions.
Walk towards the stairs and the steps light up one after another in the direction you are heading. Reach the top, and they switch off behind you. Two IR sensors — one at each end — tell the Arduino which…
Clap your hands and the light comes on. Clap again and it goes off. This version does it properly: a microphone sound sensor feeds a real microcontroller, and a relay module does the switching — so it drives an actual…
Aim a laser beam across a doorway onto a light sensor. While the sensor can see the beam, everything stays quiet. The moment somebody walks through and breaks it, the Arduino fires the buzzer and prints the alert on the…
Build a digital countdown timer with Arduino and a TM1637 4-digit display. Wiring diagram, code and extension ideas.
Make an automatic night light with Arduino and an LDR that switches on in the dark. Wiring diagram, code and calibration tips.
Build an RFID door lock with Arduino, the RC522 reader and a servo latch. Full wiring diagram, code and how to register your card.
The easiest automation upgrade there is: two wires, no switch, no rewiring. Here is how the E27 sensor holder connects and the real difference between the fixed Z04-N and the adjustable Z04-Q.
Build a gas and smoke leak detector alarm with Arduino and the MQ-2 sensor. Wiring diagram, code and how to set the alarm threshold.
Use a soil moisture sensor and a relay-driven pump to water plants automatically with Arduino. Full wiring diagram, code and calibration tips.