How can I vary resistance from MCU?

Question

I would like to replace a variable resistor with a device that is controlled by MCU. I know a transistor can act like a switch which solves part of my problem. Thanks, Clem

D_Hersey · Answer

Digital Potentiometer (DCP) ICs | Intersil

peterjcs23 · Answer

http://www.farnell.com/datasheets/318615.pdf these are variable resistors used for calibration

jw0752 · Answer

Hi Clem,

I remember that Jeremy Blum had a chapter in his book, (Chapter 9) "Exploring Arduino" where he used the Arduino to control a digital potentiometer. As I remember it was very well written and might provide a good template for doing what you want to do. Here is a Link to his web site and a preview of that chapter.

http://www.exploringarduino.com/content/ch9/

John

How can I vary resistance from MCU?

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