![]() So you would need to keep track of the last light level, then in loop() check if the current light level is different (and greater than some threshold you will have to determine through testing), then change the state of the blinds and store that last level. You want it to do the task and then in loop() wait until the state (light level in your app) has changed. That is wasteful and will burn out the motor in something like a blinds application, day in, day out. Key thing is that you don't want to be energizing the motor continuously (which is how standard servos maintain position). They have torque but they are much slower than continuous servos. The first example is a simple program that illustrates how to move a continuous servo motor forward and back: int motorPin 4 / digital pin for the servo. A better solution might be a small gearhead stepper motor like this one from AdaFruit. If you go with the switches, then a continuous servo would work. (See this Polou page for details.) This means you won't know when the blinds have reached their open/closed positions unless you also add limit switches. With continuous servo motors, you give up position information. Int servoDegree = map(servoPos, 255, 0, 0, 179) The first loop increments the value of the pos variable and uses it to control the servo motor using a myservo.write command, sending the shaft from 0 to 180 degrees. Then the loop, which consists of two for loops. Int servoPos = map(pos, 0, 1023, 255, 0) In the setup we attach our servo object to the servo motor control line on pin 9 of the Arduino. Serial.println(analogRead(sensorPin)) // print carriage return Serial.print("Cell = ") // print the value (0 to 1024) ![]() For DEBUGGING - Print out our data, uncomment the lines below Serial.begin(9600) // start serial for output - for testing Int sensorPin = A0 // select the input pin for the ldr i’m using labview interface to control the servo motor ( one horizontal & one vertical ). I’m currently doing a solar panel charger with LDR Sensor to track the maximum voltage etc measurement. define MAXPWM 2150 define MIDPWM 1500 define MINPWM 850. For such servo, the normal Arduino code for servo motors won't work. If light sensor detects dark then rotate the servomotor a to a certain degree and then stopĪnd if light sensor detects light then rotate the servomotor to a certain degree and then stop. control continuous servo motor with LCD display. I believe by continuous rotation servo you mean servos similar to TowerPro MG-995 or Winch Servo HS-785HB. I guess I will need a if statement something like this: I wanted it to work with a continuous servo motor because you can "control it better" and its the one I have. This code works for a standard servo motor. So the slats of the venetian blinds will rotate to a open position when the light sensor detects darkness and rotate to a closed position when the light sensor detects light. Im creating a automatic venetian blind where it will open when dark and close when bright. Im doing a home project just for fun and Im pretty new to the Arduino, but I do know the basics. ![]()
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