Digital potentiometer control - Electronic Circuits Projects Diagrams Free

tester123 · 31st July 2004, 04:38 AM

Hi, everbody. My question is can I control a digital potentiometer with a rotary potentiometer. I want to use a 5K pot to control a digital pot so i can get a 0 - 100K output. What I want to do is use a remote control transmitter gutted of all electronics expect ofcourse the 5k pots so I can output to a PC gameport. All game ports use a 100k pot. So I need a 100k output from a 5k pot. I thought of using a digital 100k pot but I really have no experience with them. Maybe somebody may have a different idea on how to do this and help me out.

Thanks for any help

**Nigel Goodwin** · 31st July 2004, 08:22 AM

Quote:

Originally Posted by tester123

Hi, everbody. My question is can I control a digital potentiometer with a rotary potentiometer. I want to use a 5K pot to control a digital pot so i can get a 0 - 100K output. What I want to do is use a remote control transmitter gutted of all electronics expect ofcourse the 5k pots so I can output to a PC gameport. All game ports use a 100k pot. So I need a 100k output from a 5k pot. I thought of using a digital 100k pot but I really have no experience with them. Maybe somebody may have a different idea on how to do this and help me out.

Joysticks only use a small part of the 100K track, so you don't need 100K travel - try measuring one to see how much you need!.

Captain Zap · 17th August 2004, 02:58 AM

why dont you use a rotery encoder insted or the 5k and use a micro processteor to control your digital pot. also how many steps in the digital potenitomiter is going to directly reflect on your sensitivity especialy considering that you are not useing the full range of the pot. i have not used a digital potentiomiter in your aplication, but i would sugust atleast a 100 step digital potentiomiters. here is a couple links to manufacturs of digi pots, io hope the application notes can prove useful. http://www.intersil.com/products/dev...ts.asp?i=10763
http://www.maxim-ic.com/DigitalPotentiometers.cfm
hope this helps.

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31st July 2004, 04:38 AM	(permalink)
tester123	Digital potentiometer control Hi, everbody. My question is can I control a digital potentiometer with a rotary potentiometer. I want to use a 5K pot to control a digital pot so i can get a 0 - 100K output. What I want to do is use a remote control transmitter gutted of all electronics expect ofcourse the 5k pots so I can output to a PC gameport. All game ports use a 100k pot. So I need a 100k output from a 5k pot. I thought of using a digital 100k pot but I really have no experience with them. Maybe somebody may have a different idea on how to do this and help me out. Thanks for any help

17th August 2004, 02:58 AM	(permalink)
Captain Zap	why dont you use a rotery encoder insted or the 5k and use a micro processteor to control your digital pot. also how many steps in the digital potenitomiter is going to directly reflect on your sensitivity especialy considering that you are not useing the full range of the pot. i have not used a digital potentiomiter in your aplication, but i would sugust atleast a 100 step digital potentiomiters. here is a couple links to manufacturs of digi pots, io hope the application notes can prove useful. http://www.intersil.com/products/dev...ts.asp?i=10763 http://www.maxim-ic.com/DigitalPotentiometers.cfm hope this helps.