answersLogoWhite

0


Best Answer

Typically used in logic circuits is the pull-up resistor Less common is the pull-down resistor It's purpose is to force a zero (low) value when no other component is driving the input (no load) By providing a current limited path to negative power source through the resistor, while allowing the voltage to swing high if a load is present.

User Avatar

Wiki User

16y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does a pull down resistor work?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Movies & Television

How micro ohm meter work in detail?

A current is passed through a resistor and the voltage drop is measured on the other side. It follows Ohm's law by a given current and voltage you can measure the resistance of a resistor by V=IR.


What does a resistor do in an ampliflyer circuit?

what does a resistor in an ampliflyer circuit


Function of resistor capacitor and transistor on integrated circuit?

resistor


Why you use resistor with variable resistor?

Often we want to easily change a resistor value, so we use a variable resistor. For example, we may want to change the resistor that controls the power sent to a LED, so we can easily make it brighter or dimmer. Often if we use a variable resistor, there is only a very narrow range that is useful. Continuing our example, sometimes we use several LEDs, and we use the variable resistor to set them all to the same brightness. In this case, the resistance range that sets the LED to be twice as bright as the the other LEDs, and the resistance range that sends so much power to the LED that it is permanently destroyed is even less useful. So we add a fixed resistor in series with the variable resistor -- the fixed resistor sets the minimum net resistance, no matter how we turn the knob on the variable resistor. In our example, the addition of the fixed resistor allows us to turn the variable resistor throughout its whole range, and the LED gets brighter and dimmer; without that resistor, a certain range of the knob on the variable resistor would allow so much power to go to the LED that it would be destroyed.


What is the total resistance of a 5-ohm resistor and a 10-ohm resistor in a parallel series?

2

Related questions

Where is the blower motor resistor on a 2004 Colorado?

The blower fan resistor is located in the foot well of the passenger seat (under the glove box). Remove the two screws and pull the resistor down and out. Unplug the resistor and look at the metal contact points. If they are burnt out you might have to replace the plug and resistor. Replacing the plug requires light electrical work involving crimping/splicing wires.


What is the problem with floating inputs?

The problem with floating inputs is that electrical noise in the line could trigger the input without user input. This can easily be avoided with a pull-up or pull-down resistor. The problem with floating inputs is that electrical noise in the line could trigger the input without user input. This can easily be avoided with a pull-up or pull-down resistor.


What is different between the resistor and pullup resistor?

A "pull-up" resistor is a resistor used to to perform a specific electronic function - it is not a different type of resistor. A very small current flows through a pull-up resistor so it does not need to be high wattage (1/8 watt is generally fine). The value of a pull-up resistor depends on the resistance of the sensor. If it is simply on or off (no resistance) then a typical pull-up resistor might be 10k ohms.


What a weak pull up resistor?

A: That refers to a resistor pull up that is not sufficient to do the job that is to pull up. It also means is greater in value that it should be


Where is the Blower motor resistor on 79 bronco?

If you pull the glove box liner out you will see it on top of the duct work.


Where is the fuse for the blower motor located for a 2005 Chevy Colorado?

The blower fan resistor is located in the foot well of the passenger seat (under the glove box). Remove the two screws and pull the resistor down and out. Unplug the resistor and look at the metal contact points. If they are burnt out you might have to replace the plug and resistor. Replacing the plug requires light electrical work involving crimping/splicing wires.


What is chip resistor array?

A: These particular chips have laser cut resistor to insure resistance consistencies as required by designers. In these cases usually the use is for DAC or ADC . However they can be nothing more then pull up or pull down resistors for easier of packaging and layout,


Why won't the pull down mechanism work for 1993 buick road master?

Replace the pull=down switch to fix.


Why do you need pull up register?

pull up resistor is a one of the dubakur resister


Why don't heat work anymore in 1996 Chevy cavalier?

try looking at your resistor pack on the passsenger side lower the blower motor down and there is a heat coil and resistor in there


How dimer switsh work?

It works by sending the current through a resistor. As you twist the dimmer switch it changes the length of the resistor and the longer the resistor the more it inhibits the current. So at full brightness the resistor has been totally bypassed as you turn the light down the contact moves further around the resistor making it longer.


Where is the blower motor resistor located on a 96 dodge neon?

Under the cowl where the wipers are. Remove that and two screws to pull resistor out.