Contents
What kind of resistor is a digital potentiometer?
A digital potentiometer (digital pot) is a variable resistor that is controlled by digital signals instead of by mechanical movement. In principle, at the heart of a digital potentiometer is a resistor ladder with electronic switches at its every step.
When to use a mechanical or digital potentiometer?
The mechanical potentiometers are used for manual controls where someone should physically vary the resistance of the device to change the output. But a digital potentiometer can automatically vary its resistance depending on the given condition.
How are the blocks of an electronic potentiometer built?
The blocks of an electronic potentiometer include a Series of resistors, a Memory unit, and a Control / Interface unit The Digipots are built by connecting a series of resistors in a ladder-like structure; each step of the ladder consists of a switch that is connected to the output of the potentiometer.
Why do you need EEPROM for digital potentiometer?
The integrated EEPROM option allows you to save digital potentiometer settings at power-down and restore to its original value and power-up. Resistor network configurations allow the package size/cost to be minimized for the desired functionality.
How does a digital potentiometer work in Arduino?
As you may have noticed, a digital potentiometer behaves the same as a mechanical potentiometer, except that instead of having a round handle that you can turn, it’s controlled by a digital interface. As a basic test, you can drive MCP41010 with the help of an Arduino UNO and its Serial Peripheral Interface (SPI) port.
Can a potentiometer be used to control a light bulb?
By connecting relay to light bulb, led strip, motor or actuator… We can use the potentiometer to control light bulb, led strip, motor or actuator… Please note: These are affiliate links. If you buy the components through these links, We may get a commission at no extra cost to you.
How is the resolution of a digital potentiometer determined?
The amount of steps in the ladder determines the resolution of the digital potentiometer. Digital potentiometers are integrated circuits with the initial position of the wiper at the midscale.