{"id":270,"date":"2013-08-02T14:54:00","date_gmt":"2013-08-02T14:54:00","guid":{"rendered":"http:\/\/dbbd.sg\/blog\/uncategorized\/simple-light-meter-arduino-servo-photocell\/"},"modified":"2021-05-15T13:57:31","modified_gmt":"2021-05-15T13:57:31","slug":"simple-light-meter-arduino-servo-photocell","status":"publish","type":"post","link":"https:\/\/dbbd.sg\/blog\/2013\/08\/simple-light-meter-arduino-servo-photocell\/","title":{"rendered":"Simple Light Meter (Arduino + Servo + Photocell)"},"content":{"rendered":"

Today I almost attended a 24-hour programming contest<\/a> but at the briefing I decided I didn’t fancy sitting there overnight, or being told where I can go and can’t. So I simply left. Since the point of me signing up for such an event was mainly to force myself to set aside a little time to figure out how to use Arduino, I sat there for a little while looking up what I was interested in exploring, and went to Sim Lim, where I bought a few bits and bobs and a little servo – and then went home and made my own dumb experiment…<\/p>\n

Arduino Uno + Photocell + 1 k\u03a9 Resistor + Small Servo<\/h1>\n

\"P8024918\"<\/p>\n

BRIGHT!<\/p>\n

\"P8024919\"<\/p>\n

DARK…<\/p>\n

Okay this is basically a superbeginner mashup of these two basic tutorials: Adafruit’s Making Sounds (Lesson 10)<\/a> + Adafruit’s Servo Motors (lesson 14)<\/a>. Well I guess I gotta start somewhere so don’t laugh at the simpleness of this. I’m just writing it out here because I will probably forget it all if I don’t write it down properly, and god knows actual hardware is an undiscovered country for me.<\/p>\n

#include<\/pre>\n
int servoPin = 9;
\nServo servo;
\nint angle = 0; \/\/ servo position in degrees
\nint photocellPin = 0;<\/p>\n
void setup()
\n{
\nservo.attach(servoPin);
\n\/\/Serial.begin(9600);
\n}<\/p>\n
void loop()
\n{
\nint reading = analogRead(photocellPin);
\nint newAngle = reading\/3 – 100;
\n\/\/Serial.print(newAngle);
\n\/\/Serial.print(“n”);
\nservo.write(newAngle);
\ndelay(60);
\n}<\/p>\n