Make: Projects
Arduino-Controlled Night Light
Make a night light that automatically goes on when you turn off the lights.
Using a light sensor, some wire, and LEDs you can easily create an automatic night light that will turn on when you turn off the lights.
Steps
Conclusion
You can take this project further by adding code to slowly fade the LEDs on and off in different patterns, or by adding a timer to fade the night light off after a set period of time.
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Hey, where is the arduino code for this project? There is no pdf file here
Here is some simple code if you wish for a single LED. Just a simple if/else statement. I connected my LDR to the analogue input and had the serial print just to have a look at what sort figures I was getting. You can then make the if/else statement a lot more complicated from this.
int led =7;
int ldr= A0;
void setup() {
pinMode(led, OUTPUT);
Serial.begin(9600);
}
void loop() {
int sensorValue= analogRead(A0);
float voltage= sensorValue * (5.0 /1023.0);
if (voltage>=3.0)
{
digitalWrite(led, LOW);
}
else
{
digitalWrite(led, HIGH);
}
Serial.println(voltage);
}
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