Arduino Nano SSD1306 OLED: Decode Morse Code Live
Build an Arduino Nano Morse code decoder with an SSD1306 I2C OLED and buzzer sidetone for live feedback while practicing timing, using...
Arduino Nano IR Sensor: Measure RPM on OLED Display
Build an Arduino Nano IR sensor tachometer that counts interrupt pulses and shows accurate RPM on an SSD1306 OLED, using parts from...
Arduino Nano LCD1602: Autorange capacitance meter
Build an Arduino Nano autorange capacitance meter with an LCD1602 (I2C) readout, using RC timing to measure from ~10 pF to 10,000...
Arduino Nano LCD1602: Kitchen Timer Countdown Build
Build an Arduino Nano LCD1602 kitchen timer with a knob-set countdown, Start/Reset buttons, and a buzzer alarm using a clean state-machine pattern...
Arduino Uno HC-SR04: LCD Parking Sensor with Beeps
Build an Arduino Uno HC-SR04 parking sensor with an LCD distance readout and proximity beeps, plus simple filtering for stable measurements from...
Arduino Uno Potentiometer: Control LED and Servo
Build an Arduino Uno potentiometer knob that reads analog input and controls LED brightness, servo angle, and modes using map() with parts...
Arduino Uno LM35: LCD Thermometer With C/F Toggle
Build an Arduino Uno LM35 LCD thermometer with a pushbutton C/F toggle, learn simple analog ADC math, and get stable readings with...
Arduino Nano Colpitts Oscillator: Build a Metal Detector
Build an Arduino Nano metal detector using a Colpitts oscillator and frequency counting for simple LED and buzzer alerts, based on a...
Arduino Nano LCD1602: Build a Whack-a-Mole Game
Build an Arduino Nano whack-a-mole game with five lit buttons, LCD1602 I2C score and countdown bar, and buzzer feedback using parts from...
Arduino Nano WS2812 Matrix: 2-Player Reaction Timer
Build an Arduino Nano 2-player reaction timer using a WS2812 8x8 LED matrix for GO cues and scoring, plus buttons and buzzer...
Arduino Uno 7-Segment Display: Build a Digital Dice
Build an Arduino Uno digital dice with a 7-segment display and roll button, using random() with proper seeding for fair 1 to...
Arduino Uno RGB LED: Mix Colors with Three Knobs
Build an Arduino Uno RGB LED color mixer with three potentiometers, using PWM and analog inputs to dial any color and copy...