Week 4: Do Somehing With An Arduino

For Week 4, my main goal was to start and finish a project in the alotted time, since I had over-ambitious ideas for Weeks 2 and 3 and then ran out of time to complete them. I decided to build a simple circuit with a LED that turns on when it gets dark. I always forget to turn on my lights when it starts get darker in the afternoon and then I spend a considerable amount of time ruining my vision, so this mechanism would be very useful to me.

Model of circuit

Code snipet

const int LIGHT_SENSOR = D0;
const int LED = D7;
int analogValue;

void setup() 
    {
    Serial.begin(115200);
    pinMode(LED, OUTPUT);
    pinMode(LIGHT_SENSOR, INPUT);
    }

void loop() 
    {
    analogValue = analogRead(LIGHT_SENSOR);
    if(analogValue < 2000)
        digitalWrite(LED, HIGH); // LED on
    else
        digitalWrite(LED, LOW);  // LED off
        Serial.println(analogValue);
    }