almost 2 years later, when we return to the lab.....

and the link to the group assignment is: FabLabCDMX.

BRIEF

For this assignment I made a new PCB for the LDR that will function sensoring the amount of light so I can program the leds of my project to turn ON when is getting dark and to turn OFF when there´s more amount of light.

Eagle, Modela, PCB, ,Arduino UNO, Arduino IDE, Hugodino, LDR, LEDS,

The schematic for my LDR board

I left 3 pins out when draw the outline, I´m not going to use them.

I use MODS to set up the Modela for milling my PCB

The board and the components I´m going to weld on it.

Here´s the LDR board finished with the pins to connect the LDR sensor and the pins to the PCB and one resistor

First , I´m going to test my LDR board with ARDUINO before using it with my board to check if there are some issues regarding the correct function of the LDR sensor

Here is the original CODE using ARDUINO to test the LDR sensor

int ldr=5;//Set A0(Analog Input) for LDR.
int value=0;
void setup() {
Serial.begin(115200);
pinMode(3,OUTPUT);
}

void loop() {
value=digitalRead(ldr);//Reads the Value of LDR(light).
Serial.println("LDR value is :");//Prints the value of LDR to Serial Monitor.
Serial.println(value);
if(value<300)
{
digitalWrite(3,HIGH);//Makes the LED glow in Dark.
}
else
{
digitalWrite(3,LOW);//Turns the LED OFF in Light.
}
}

Everything works fine and now I´m ready to connect it to my board.

Everything is connected, the batteries, the LDR, my HUGODINO board and the leds through a voltmeter to did the group assignment.

This is the code I use to test the LDR sensor

/*
  

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
*/
int ledpin = 9;
int ldr=5, aux;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(ledpin, OUTPUT);
  pinMode(ldr, INPUT);
}

// the loop function runs over and over again forever
void loop() 
{
  aux=digitalRead(ldr);
  /*aux=!aux;
  digitalWrite(ledpin,aux);*/ 
  if(aux==0)
  {
    digitalWrite(ledpin, HIGH);
  }
  else
  {
    digitalWrite(ledpin, LOW);
  }
  //delay(1000);
      
}

Testing the input with the voltmeter, the LEDS are ON and the mA in 2.51

int ledpin = 9;
int LDR = 5;
int aux;
int servo = 8;
int angle;
int pwm;

void setup()
{
// put your setup code here, to run once:
pinMode(ledpin, OUTPUT);
pinMode(LDR, INPUT);
pinMode(servo, OUTPUT);
}

void loop()

{
aux = digitalRead(LDR);
if(aux==0)
{
    digitalWrite(ledpin, HIGH);
}
else
{
    digitalWrite(ledpin, LOW);
}
// put your main code here, to run repeatedly:
for (angle = 0; angle <= 40; angle += 5) {
   servoPulse(servo, angle); }
   delay(5000);

aux = digitalRead(LDR);
if(aux==0)
{
    digitalWrite(ledpin, HIGH);
}
else
{
    digitalWrite(ledpin, LOW);
}

for (angle = 40; angle <= 80; angle += 5) {
   servoPulse(servo, angle); }
   delay(3000);

aux = digitalRead(LDR);
if(aux==0)
{
    digitalWrite(ledpin, HIGH);
}
else
{
    digitalWrite(ledpin, LOW);
}

for (angle = 80; angle <= 170; angle += 5) {
   servoPulse(servo, angle); }
   delay(3000);

aux = digitalRead(LDR);
if(aux==0)
{
    digitalWrite(ledpin, HIGH);
}
else
{
    digitalWrite(ledpin, LOW);
}

   for (angle = 170; angle >= 0; angle -= 5) {
   servoPulse(servo, angle); }
   delay(3000);
}

void servoPulse (int servo, int angle)

{
pwm = (angle*11) + 500;      // Convert angle to microseconds
digitalWrite(servo, HIGH);
delayMicroseconds(pwm);
digitalWrite(servo, LOW);
delay(50);
}

IN THIS CODE, THE "READING" OF THE LDR SENSOR, TURNS ON AND OFF THE LEDS, WHEN THERE´S LIGHT THE LEDS ARE OFF AND WHEN THE AMOUNT OF LIGHT POINTING TO THE LDR DECREASE, THE LEDS TURN ON, THIS SENSOR OR THIS RESISTOR LET THE CURRENCY PASS THROUGH THE CONNECTION TO THE LEDS IT´S LIKE A SWITCH, WITH LIGHT CUTS THE ELECTRICITY AND WITHOUT LIGHT LET THE ELECTRICITY GOING THROUGH THE CONNECTIONS THAT TURNS THE LEDS ON. THAT´S WHY YIU CAN SEE IN THE HEADER VIDEO THAT THE VOLTAGE GOES UP WHEN YOU PUT YOUR FINGER OVER THE LDR.

here is another video besides the one at the header where using the input of the LDR (Light Dependent Resistor) sensor to turn of and on the LEDS

Links:

CDMX electrónica

arduino

tutorial RCWL-0516

INPUT DEVICES

almost 2 years later, when we return to the lab.....

BRIEF

Links:

the green spot