Real time Analog Clock in BananaPi

Real time Analog Clock in BananaPi

24th July 2019 0 By Tanna TechBiz

Introduction

  • Here we are going to create a simple real time analog clock using bananapi.
  • To do this we are using python programming language and python turtle module.
  • The turtle module is a builtin module in python, meaning you do not have to install it.
  • It is used to create basic 2D shapes and drawings and is extremely beginner friendly.
  • The main advantages of turtle is that it is extremely simple and makes it very easy to draw things to the screen.
  • That being said the turtle module does offer support for some more advanced functionality.
  • For better understanding of python turtle module visit :

Analog clock

  • First we need to understand what is analog clock and how it works ? after that we are able to make a code for that.
  • Analog clock has one dial in which 12 digits or marks are there starting from 1 to end at 12, that all are separated with each other by angle of 30 degree.
  • Other than this it has 3 hands analog clock having basically indicating hour, minute and second. At every second of time hand for second moves 6 degree , at every minute hand for minute moves also 6 degree and at every 30 minutes hand for hour moves 15 degree. (This is what we are going to do in our code).

Component you require

  • Banana Pi
  • Class 10 micro SD card
  • 5V 2A powerm supply
  • Monitor screen
  • HDMI cable
  • Keyboard, Mouse

First of all you need to boot up your bananapi for that visit : https://bananapiblog.com/2019/05/02/how-to-install-linux-based-os-images-except-android/

  • Now let’s start to make clock
  • First of all import modules.
        import turtle         
        import time
  • Define our screen object and modify screen
        wn = turtle.Screen()
        wn.bgcolor("black")
        wn.title("Analog clock by Tanna TechBiz")
        wn.tracer(0) 
  • Now define our turtle object
        pn2 = turtle.Turtle()
        pn2.speed(0) 
  • Make a clock by making a function, later on we will call that function to make a clock.
        def clock(h,m,s, pn2):
            #Draw dial (outer circle)
            pn2.up()
            pn2.goto(0,210)
            pn2.setheading(0)
            pn2.down()
            pn2.pensize(3)
            pn2.color("cyan")
            pn2.circle(-210)
            pn2.ht()

        #Draw mark on dial
        for i in range(12):
             pn2.up()
             pn2.goto(0,0)
             pn2.down()
             pn2.rt(30)
             pn2.up()
             pn2.fd(170)
             pn2.down()
             pn2.fd(40)

        #Hour hand
        pn2.speed(0)
        pn2.up()
        pn2.goto(0,0)
        pn2.color("white")
        angle = (h / 12)* 360
        pn2.down()
        pn2.setheading(90)
        if m > 0 and m < 30:
            pn2.rt(angle)
        else:
            pn2.rt(angle+15)
        pn2.fd(60)

        #Minute hand
        pn2.speed(0)
        pn2.up()
        pn2.goto(0,0)
        pn2.color("magenta")
        angle = (m / 60)* 360
        pn2.down()
        pn2.setheading(90)
        pn2.rt(angle)
        pn2.fd(100)

        #Second hand
        pn2.speed(0)
        pn2.up()
        pn2.goto(0,0)
        pn2.setheading(90)
        pn2.color("gray")
        angle = (s / 60)* 360
        pn2.down()
        pn2.rt(angle)
        pn2.fd(130)
       while True:    

            h = int(time.strftime("%I"))

            m = int(time.strftime("%M"))

            s = int(time.strftime("%S"))
       clock(h, m, s, pn2)
       pn2.st()
       wn.update()
       time.sleep(1)
       pn2.clear()
  • By writing this you will able visualize the Real time analog clock in your bananapi screen.

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