Switch/Bump Sensor

Parts

-Arduino microcontroller and carrier board

-LiPo battery

-Bump sensor

Prepare the breadboard

Solder wire to NO (normally open) and C (common) switch terminals. Then when switch is pressed, circuit is closed (like a pushbutton). Follow code (below) in File:Examples:Digital:Button. Use breadboard to mount 10K resistor (brown, black, orange); see diagram and photo. Verify when switch is pressed, LED lights up.

Program the Microcontroller

int buttonState=0;

#define buttonPin 3

void setup()   

{

    pinMode(buttonPin, INPUT);

    Serial.begin(9600);

    delay(25);

}

void loop()

{

    // read the state of the pushbutton value:

    buttonState = digitalRead(buttonPin);

    if (buttonState == HIGH)

        Serial.println("button pressed");

    else

        Serial.println("not pressed");

}