What is Pull up Resistor and Pull Down Resistor ? How to select the pull-up resistor value ?

In this video, what is pull-up and pull-down resistor and how to select the value of pull-up resistor for specific application has been explained in detail (using the calculations). The following topics are covered in the video: 0:00 What is Pull-up and Pull-down Resistor ? 5:20 Applications of Pull-up Resistor 8:57 How to select the pull-up resistor value for specific application ? The link for the other useful videos: 1) What is Buffer and Tri-State Buffer ? 2) Difference between Latch and Flip-Flop ? What is Pull-up and Pull-down resistor ? The pull-up resistor pulls up the voltage of the digital pin to logic HIGH and it prevents it from the floating condition (when the pin is interfaced with a switch). The pull-up resistors are often used with the open collector gates and open collector ICs and they are important part of the I2C protocol. The pull-down resistor works exactly opposite to the pull-up resistor. It pulls down the voltage of the digital pin to logic LOW and prevents it from the floating condition. While using these pull-up and pull-down resistor in any circuit, the selection of the proper value of the resistor is also very important. In this video, how to select the value of pull-up resistor for the specific application is explained using the calculations. This video will be helpful to all the students of science and engineering in understanding the pull-up and pull-down resistors and how to select the pull-up resistor for the specific application....