Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Parallel Resistance Issues for a Microcntroller

Status
Not open for further replies.

piclearner

Newbie level 3
Joined
Mar 20, 2010
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,305
Hi,

I need to sense 3 different potentiometers using a microcontroller. The potentiometers are connected same 3.3.v. When we rotate one potentiometer, it is effect rest of two. The potentiometers are not working independently, since it is act as parallel resistance. So how can we solve this issue. I need to work these potentiometers independently.

Thank You,

Piclearner
 

betwixt

Super Moderator
Staff member
Joined
Jul 4, 2009
Messages
14,877
Helped
4,862
Reputation
9,742
Reaction score
4,643
Trophy points
1,393
Location
Aberdyfi, West Wales, UK
Activity points
126,635
We need to see your schematic.

If you have the potentiometer tracks (the ends) at ground and 3.3V and the 3.3V is stable, you should get 3 independently adjustable voltages out at their wipers.
Are you saying the voltages really do change (as measured on a voltmeter) or that the microcontroller senses interaction between them that isn't really there?

Brian.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top