Arduino IR Remote Tutorial: Control an LED, Then Add a Servo Door

Arduino IR remote LED & servo door demo: Uno + KY-022, LED on breadboard, SG90 opening latch, kit remote in hand.

Build an Arduino IR remote LED controller with a KY-022 receiver, then upgrade the same circuit to operate a servo-driven door. Includes wiring diagrams, IR scanner code, complete Arduino sketches, troubleshooting, and FAQ.

Arduino Password Door Lock with Keypad and LCD

Arduino Password Door Lock with keypad, LCD and servo motor demo setup

Step-by-step tutorial for building an Arduino password door lock using a 4×4 keypad, 16×2 I2C LCD display, and SG90 servo motor. Includes full wiring diagram, complete Arduino code, line-by-line code breakdown, testing tips, troubleshooting guide, FAQ, and upgrade ideas.

Arduino Servo Control Guide: SG90, PWM, and PCA9685

A person holding two different types of servo motors.

Want to make a servo motor move precisely to any angle with your Arduino? Whether you are building a robotic arm, a pan-tilt camera mount, or an automated door lock, Arduino servo control is one of the most essential skills in electronics and robotics. However, many beginners struggle with jittery servos, incorrect wiring, and confusion … Read more