Arduino Uno R4 — Relay Timer with Interlock
Control a low-voltage relay driver with safe default and timeout. Program and practical guide for Arduino Uno R4.
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Project Collection: Beginner Foundations
Arduino Uno R4 — UART Command Console
Parse bounded serial commands and return deterministic responses. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — I2C Address Scanner
Scan valid 7-bit addresses and report responding devices. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — SPI Device Identifier
Send an identification command and validate the returned bytes. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — OLED Sensor Dashboard
Render live sensor values and status without blocking acquisition. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — GPIO LED and Safe Current
Drive an LED with a calculated resistor and verify HIGH/LOW voltage. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — LCD Menu Interface
Build a button-driven menu with clear state transitions. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — Push Button Debounce
Read a button reliably using a timed software debounce state. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — Timestamped Data Logger
Record validated samples with timestamp and error flags. Program and practical guide for Arduino Uno R4.
Read more →Arduino Uno R4 — Traffic Light State Machine
Sequence three outputs without blocking delays. Program and practical guide for Arduino Uno R4.
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