History of Computer | Pascaline Calculator

Hello Students today we will look at the Pascaline Calculator Blaise Pascal who created it was a French mathematician who in 1642 created a calculating machine The world's first mechanical calculator was invented He also established a law in Physics known as the Principle of Transmission The Pascaline Calculator could perform only addition and subtraction It could not have performed any other operation than the Pascaline Calculator's It had a metal frame or structure with 6-8 input wheels on it Each Input Wheel had a set of Spokes that were touched by a Stylus It was rotated in the clockwise direction to measure this rotation on top of each input wheel There was a 10-point numbered crown and a Stop Bar that was used with Each wheel's position could be reset to view the outpu There were 2 Output Windows One showed the result of an Addition And one showed the result of a Subtraction It was in a time when we could see the same Result For this reason were given a Sliding Slat or Sliding Panel With it we could hide a window We see this in August the process of Addition was how So let's suppose That we need to add 2 values and those values are 5 plus 7 We will use the Rightmost Input Wheel for that because we have There are 2 Single Digits here So we use the Stylus to count the Spokes on the Rightmost Wheel We will rotate 5 points clockwise Inside our output window 5 will appear In July we need to add 7 to it What should we do for it As soon as we We add 4 Points and Add them then we have 9 in the Output Window inside When the number 9 appears inside an Output Window we rotate its Wheel 1 Point and Rotate are performed then automatically on its left side will be the Rotating Wheel It will be added to the Output Window 1 Add will be added This is exactly the same As you pass Carry So this Rotating Wheel As soon as it moves beyond 9 0 will appear on top Then it will go to the right side of the wheel inside the output window Because the Wheel has completed its Circle So within the Next Wheel It will be automatically added 1 Point Now add 2 Points and rotate them You have completed 7 The Output Window now contains the Result The one who is 12 years old After performing any Operation We had to reset the Calculator The process was that we turned all Input Wheels They rotated it in such a way that each Input Wheel ended up inside the Output Window This plan had all values set to 999 After that we moved the Rightmost Wheel They used to Value Rotate it Inside all those 9s When another Add was happening You would set all the Values to Zero Like this The Pascaline Calculator was reset We perform another addition So let's suppose we have 25 Add 15 more to it For that we now add 2 Wheels We will use them because we have 2 Digits We will write "Second Last Wheel" above 2 For this we need Simply Spoke Rotate 2 Points Clockwise then we have this 2 has come We will write 5 On the top of the Right Side Wheel We will rotate 5 points and it will become 25 in the Output Window We need to add 15 and Add in it so 15 and Add We need to perform another rotation of this Wheel So we perform another rotation on top of it You will have 3 here We have added 5 here We need to do it on this Wheel for that we need 5 more Points We rotate it As soon as we rotate 5 points If its value is greater than 9 it becomes a complete circle It will automatically move to the next wheel and it will be added as a point You will get 4 here and you will get 0 here You can perform the addition operation with this formula 25 Plus 15 Equals to 40 From this arrangement we can perform the addition operation If you want to use a large value use it in which 100 is If there is added value we will use it And if we have to add 1000 Plus Value We will use 4 Wheels In August we see how the subtraction process will go The process of subtraction is the same as the process of addition Unless it is reversing direction it keeps changing What does "ab" mean For example we have a Numbered Line Numbers from 0 to 99 are provided on it It is divided into 10 points 10 20 30 40 so on If we have to add Two Values what will we do We will move this numbered line from left to right and then we can perform addition You can easily add two values For example we have 20 plus 10 We have to perform the Addition operation So we move to the Numbered Line from 0-20 You will receive the First Value today Now it includes 10 Points When we add it we will have Addition and Result will be 30 If we have to do 30 plus 20 then in this way We will reach the first 30 We will add 20 points You will get the Result today 50 Now Subtraction The process is the same as well The only difference is that We will reverse the direction of this numbered line Now if we repeat the same process The result that will come to us will be a subtraction not an addition If you add 20 plus 10 on this line Meaning move left to right and add 20 plus 10 You will get the result of Subtraction For example We first make 20 They add 10 values and proceed from left to right We will not make a direction change but as soon as you add 10 points The result you will get is 10 because it is the result of subtraction We were also moving from left to right in addition The values were being added Because we have changed the Direction of Values If we move left to right our values will automatically subtract We do 30 minus 20 We will reach 30 first Then beyond that We will add 20 more points which means the direction is left to right then the result will appear The result of subtraction will be Basically we can rotate the input wheels Only inside the clockwise direction Can rotate We cannot rotate them in the reverse or counterclockwise direction What has been done for it If we add You go from Zero to Nine and if we do Subtraction You are moving from Nine to Zero Now these Nine Digits or this Process The number that we call Nine's Complement is inside the Pascaline Calculator With whose help do we perform subtraction Now if we subtract Subtract 15 from it then we will simply rotate the wheels to make it 25 When our number reaches 25 we will add 15 more to it We will add them back now since we are returning from Nine Because of the 15 and Add we will go back to 10 And this will be the result of subtraction So I hope you understood it If you still have any questions You can ask questions in the comments Thank you