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Raspberry Pi Laser Pointer

• The Laser is currently off (turn on)

• Source: CAT LASER POINTER TOY

• Prerequisites

  • Laser Diode
  • camera mount with 2x servos
  • 12 wires
  • 1 x NPN Transistor

• Setup

  • X Servo

  • power connects to header pin 2 (5v power)
  • ground connects to header pin 6 (Ground)
  • control connects to header pin 7 (GPIO4)

  • Y Servo

  • power connects to header pin 4 (5v power)
  • ground connects to header pin 9 (Ground)
  • control connects to header pin 11 (GPIO17)

  • Wire

  • transistor emitter to Pi pin 25 (Ground)
  • transistor base to Pi's pin 13 (GPIO27)
  • transistor collector to laser ground
  • laser power to Pi's 3.3v pin 1

• Software

  file laser.py

  import RPi.GPIO as GPIO
  
  class Laser:
    def __init__(self):
      self.refresh()
  
    def refresh(self):
      GPIO.setmode(GPIO.BCM)
      
      self.pins = {
        27 : {'name' : 'Laser', 'state' : GPIO.LOW}
        }
  
      for pin in self.pins:
        GPIO.setup(pin, GPIO.OUT)
        self.pins[pin]['state'] = GPIO.input(pin)
  
      self.templateData = {
        'pins' : self.pins
        }
      
      return (self.templateData)
  
    def setPin(self,changePin,action):
      GPIO.setmode(GPIO.BCM)
      GPIO.setup(changePin, GPIO.OUT)
      if action == "on":
        GPIO.output(changePin, GPIO.LOW)
      if action == "off":
        GPIO.output(changePin, GPIO.HIGH)
      if action == "toggle":
        # Read the pin and set it to whatever it isn't (that is, toggle it):
        GPIO.output(changePin, not GPIO.input(changePin))
  
      self.refresh()
      
      return (self.templateData)
  
    def moveXY(self,x,y):
      GPIO_X_SERVO = 4
      GPIO_Y_SERVO = 17
      GPIO_Laser = 27
  
      GPIO.setmode(GPIO.BCM)
  
      GPIO.setup(GPIO_X_SERVO, GPIO.OUT)
      GPIO.setup(GPIO_Y_SERVO, GPIO.OUT)
  
      GPIO.setup(GPIO_Laser, GPIO.OUT)
      GPIO.output(GPIO_Laser, GPIO.LOW)
  
      try:
          x_servo = GPIO.PWM(GPIO_X_SERVO, 50)
          y_servo = GPIO.PWM(GPIO_Y_SERVO, 50)
  
          #2.5 is 0 degree 7.5 is 90 degree and 12.5 is 180 degree
          x_servo.start(x)
          y_servo.start(y)
  
          time.sleep(1) # give the servos a chance to move
  
      finally:
          GPIO.setup(GPIO_Laser, GPIO.OUT)
          GPIO.output(GPIO_Laser, GPIO.LOW)
  
      return ()
  

  file .html (V 0.1 laser on/off)

  {% for pin in pins %}
     <li>
     <p>The {{ pins[pin].name }}
     {% if pins[pin].state ==false %}
        is currently on (<a href="/RaspberryPi/LaserPointer.html//off">turn off</a>)
     {% else %} is 
        currently off (<a href="/RaspberryPi/LaserPointer.html//on">turn on</a>)
     {% endif %}
     </p>
     </li>
  {% endfor %}

• Database

  class Books(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column(db.String(140))
      x_coordinate = db.Column(db.Integer, default=0)
      y_coordinate = db.Column(db.Integer, default=0)