Arduino Uno Analog Joystick: Control a Pan-Tilt Servo Mount
Build an Arduino Uno pan-tilt servo mount controlled by an analog joystick with proportional speed, dead zone, and click-to-recenter using ShillehTek parts.
Arduino Uno Pushbutton Interrupts: Instant LED Toggle
Build an Arduino Uno pushbutton interrupt demo that toggles an LED instantly even during long delays, with debouncing and safe shared counters...
Arduino Nano 4x4 Keypad LCD: Build a Calculator
Build an Arduino Nano calculator with a 4x4 keypad and a 16x2 LCD, showing expressions and results with safe input handling, using...
Arduino 4x4 Keypad: Two-Octave Buzzer Piano
Build an Arduino Nano 4x4 keypad piano with a passive piezo buzzer that sustains notes across two octaves, with Serial frequency readout...
Arduino Uno LDR Solar Tracker: Dual-Axis Light Following
Build an Arduino Uno dual-axis solar tracker with four LDRs and two servos to automatically follow light with stable dead-band control, from...
Arduino Nano LCD1602: Build a millis() Stopwatch
Build an Arduino Nano LCD1602 stopwatch with Start/Stop, Lap, and Reset using millis() for accurate timing and responsive button control from ShillehTek.
Arduino Nano LCD1602: Measure 0 to 50 V DC
Build an Arduino Nano LCD1602 DC voltmeter with a resistor divider to measure up to about 50 V safely, plus averaging and...
Arduino HC-SR04 Servo: Touchless Pump Dispenser Build
Build an Arduino touchless sanitizer dispenser using an HC-SR04 distance sensor and a servo for one-pump-per-hand control, with parts from ShillehTek.
Arduino Nano Piezo Knock Sensor: Secret Knock Relay Lock
Build an Arduino Nano piezo knock sensor that flashes an LED per tap and unlocks a relay with a three-knock code using...
ESP32 Bluetooth Serial: Control an LED or Relay
Build an ESP32 Bluetooth Serial (SPP) command interface to control an LED or relay from your Android phone, with two-way status feedback...
ESP32 WebServer Relay Module: Local Phone Control
Build an ESP32 WebServer page to control an LED or relay from any phone on your 2.4 GHz Wi-Fi, keeping smart-home switching...
ESP32 Timer Wake-Up: Deep Sleep for Battery Life
Build an ESP32 timer wake-up deep sleep loop that wakes, blinks, logs boot count, and sleeps again to extend battery life using...