Relay Control 22

Switch pumps, lamps, valves, and classroom loads through relay modules.

/*
  Roboda verified Arduino sample 0543
  Feature: Relay Control
  Generated for online build, classroom practice, and hardware upload testing.
*/

const byte relayPin = 12;
const unsigned long onTime = 710;

void setup() {
  pinMode(relayPin, OUTPUT);
}

void loop() {
  digitalWrite(relayPin, HIGH);
  delay(onTime);
  digitalWrite(relayPin, LOW);
  delay(1000);
}

How it works

Practice this Arduino feature with a verified Roboda sketch.

1. Read the constants at the top of the sketch.
2. Wire the pins exactly as listed in the pin map.
3. Upload or compile once before changing values.
4. Change one value at a time and watch Serial Monitor or the output device.

Connections