General > General Technical Chat

digitally controlled potentiometer? I got this!

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krivx:

--- Quote from: canibalimao on September 05, 2015, 11:52:27 am ---
--- Quote from: rx8pilot on September 04, 2015, 05:50:54 pm ---You do know that there are many i2c and SPI digital pots on the market right?

One that I have used before....
http://www.digikey.com/product-search/en?KeyWords=MCP4661T-503E%2FMLCT-ND&WT.z_header=search_go

--- End quote ---

Yes, but using this packages in DIY projects is not very handy...


About the motorized pots, they are a bit expensive and run it on a low power environment could be a bit tricky... I know that a servo isn't better than this, this was just a funny project.

--- End quote ---

They are available in soic and DIP as well. http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP41010

amyk:
Search "motorised rheostat" and you can find some very high-power ones, used in industrial control applications:

http://www.micronor.com/products.php?product_id=248

canibalimao:

--- Quote from: krivx on September 05, 2015, 12:00:45 pm ---
--- Quote from: canibalimao on September 05, 2015, 11:52:27 am ---
--- Quote from: rx8pilot on September 04, 2015, 05:50:54 pm ---You do know that there are many i2c and SPI digital pots on the market right?

One that I have used before....
http://www.digikey.com/product-search/en?KeyWords=MCP4661T-503E%2FMLCT-ND&WT.z_header=search_go

--- End quote ---

Yes, but using this packages in DIY projects is not very handy...


About the motorized pots, they are a bit expensive and run it on a low power environment could be a bit tricky... I know that a servo isn't better than this, this was just a funny project.

--- End quote ---

They are available in soic and DIP as well. http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP41010

--- End quote ---

OMG how could I never see this?  :o  |O I've asked so many times for an electronic variable resistor and the only replys I got were recommending that other IC rx8pilot posted.

Thank you very much!!!

Galenbo:

--- Quote from: amyk on September 05, 2015, 12:20:16 pm ---Search "motorised rheostat" and you can find some very high-power ones, used in industrial control applications:

http://www.micronor.com/products.php?product_id=248

--- End quote ---

The word makes me think of the "actuator" that controls the throttle of a Diesel engine in a 1000kVA UPS/GenSet.

webgiorgio:
True there are digital potentiometer chips...but this one also features several kV isolation :)

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