Can I use a bigger resistor?

In general, no. Resistor values are carefully selected by the circuit designer to allow the circuit to work correctly. While there is some allowable tolerance, it won’t usually be as much as a different value in the series.

Can you change the resistance of a variable resistor?

A digital variable resistor is a type of variable resistor where the change of resistance is not performed by mechanical movement but by electronic signals. They can change resistance in discrete steps and are often controlled by digital protocols such as I2C or by simple up/down signals.

What happens when you increase a variable resistor?

The variable resistor is a resistor that controls (increase or decrease) the flow of electric current when we vary or change its resistance. In other words, when we vary the resistance of the variable resistor, the electric current flowing through it will increase or decrease.

Why would variable resistor be used instead of a fixed resistor?

Both types are commonly used in electronic circuits. Circuits with LEDs use fixed resistors to limit the current, thus protecting the LED from damage. A variable resistor, commonly called a potentiometer (pot for short), allows you to adjust the resistance from virtually zero ohms to a factory-determined maximum value.

What happens if you use too big of a resistor?

Internally, many power resistors are resistance wire wound around a ceramic form, which means they’re basically an air-core inductor. If you are using such a resistor in a current-sensing application in a switch-mode circuit, you will get spurious readings or inaccurate behaviour.

What happens if I use the wrong resistor?

If the circuit with the resistor is designed correctly the resistor will be able to handle the power in consumes or turns into heat. It can last decades. However, if the design is on the edge or not a good one then the resistor can be damaged and eventually fail and worse case open.

How does a variable resistor differ from a resistor?

A resistor has a fixed resistance which does not change. A variable resistor is a single unit in the circuit where the resistance can be altered….

Does voltage change with variable resistor?

A variable resistor (or potentiometer) is a variable voltage divider, so the answer is usually yes.

Does variable resistor change voltage or current?

Variable resistors are widely used in electric circuits to adjust the value of current or voltage, since the resistance of variable resistors can be set to a certain value. Variable resistors allow you to adjust the value of voltage by changing the resistance and keeping current constant .

How is a variable resistor different from a fixed resistor?

Variable resistors means that a resistor can change its resistance value through the control of a person or himself. Fixed resistance means that it cannot change its value.

How much voltage can a resistor handle?

The maximum power drawn by the chip through the resistor (by equation #2) will be 5 * 5 / 10000 = 0.0025 W, or 2.5 mW. That’s fine even the tiniest surface mount resistors. Manufacturers typically give a maximum voltage for a particular resistor range, such as 200V for a 250 mW resistor.

What is the resistance of a 470k resistor?

See below for a diagram on how to wire this up: In the above image, you have a 470K resistor in Parallel with your Volume Pot. The pot value’s resistance is 500K, and your Resistor is 470K – with a combined resistance of 242K.

Do the two resistors have to have the same value?

The two resistors don’t need to have the same value. You can also use two resistors with a different value. 100 Ohm resistor in a parallel circuit with a 50 Ohm resistor you give you a total resistance of 33.33 Ohm’s 100 Ohm resistor in a parallel circuit with a 25 Ohm resistor you give you a total resistance of 20 Ohm’s

Can you use a resistor in a guitar to change POT values?

In our last example, you can use a resistor in a guitar to change your pot value. This is handy when you only have a 500K pot on hand, but you need a 250K pot. If you have a ~500K Resistor, you can make this happen! See below for a diagram on how to wire this up: In the above image, you have a 470K resistor in Parallel with your Volume Pot.

How can I increase the resistance of a 1K pot?

But if you do not have a resistor of that value you can join resistors of lower values in series with your 1k POT to get resistance of 5k ~ 6k. In such a way you may get a variable resistance (1k pot) with a suitably high value (other resistors in series). If you wish, you may add more resistors to get higher values like 8k ~ 9k and so on.