Why do we need to use Network resistor??? A103j ( I found that it is a pul-up re

Question

Why do we need to use Network resistor??? A103j
( I found that it is a pul-up resistor is a resistor conected between a signal conductor and positive power supply )
What did they mean by the signal conductor ??? Why do we need to use Network resistor??? A103j
( I found that it is a pul-up resistor is a resistor conected between a signal conductor and positive power supply )
What did they mean by the signal conductor ???
( I found that it is a pul-up resistor is a resistor conected between a signal conductor and positive power supply )
What did they mean by the signal conductor ???

Explanation / Answer

Hello,

ANS 1:-

Any network has some resistance. to represent in diagrams or on any circuit, we need to show the resistance branch in figure. if you connect two wires without any resistor then there will be some resistance present because of wire's internal resistance.

it opposes the flow of current. no any work done is possible without obstacles. That's why we use resistors...

Also resistor networks are widely used in .

A to D and D to A convertors, computer applications, electronics, voltage deviders etc.

resistors can also be used to reduce current flow, adjust signal levels as in case stated in question, to divide the voltages etc.

ANS 2 :-

if there is no input and your microcontroller is reading the input pin, then what will happen?

if the controller reads logic high or low...! this is a floating state...

now to avoid this pull up and pull down resistors are used.

pull up to bring the logic level to defined state. that's why it is connected between positive voltage and signal conductor.... signal conductor which conducts the signal i.e your logic gate ot buffer.

and when pull down resistor is used, microcontroller reads the logic level to low or ground state.

so one for defined logic level and one for ground level....

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