Learn ARDUINO-C with Real Code Examples

Updated Nov 27, 2025

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Code Sample Descriptions

Simple Arduino Blink Program

# arduino_c/blink.ino
void setup() {
    pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
    digitalWrite(LED_BUILTIN, HIGH);
    delay(500);
    digitalWrite(LED_BUILTIN, LOW);
    delay(500);
}

A simple Arduino program blinking the onboard LED every 500ms.

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