I wrote a function to monitor the analog inputs. My approach was similar to the discrete inputs because it used an array to record the values, but I also created a couple of arrays that would send a bit high if there was a change in the reading. One went high if the value increased, and another to detect lowering.
When I measured these potentiometers before, I saw they were logarithmic, but I wanted linear. I assumed I could use a calculation to counteract the scaling, but that turned out to be a lot harder than I imagined. The issue became apparent when I plotted the analog value to the screen as a small rectangle racing along the screen's side, and it would not track the position as near as I hoped. I tried applying the natural log, log base ten, exponents, inverses, and simple arithmetic, but I could not make it behave linearly.
Slider in action
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
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This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
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2021-01-12
When I measured these potentiometers before, I saw they were logarithmic, but I wanted linear. I assumed I could use a calculation to counteract the scaling, but that turned out to be a lot harder than I imagined. The issue became apparent when I plotted the analog value to the screen as a small rectangle racing along the screen's side, and it would not track the position as near as I hoped. I tried applying the natural log, log base ten, exponents, inverses, and simple arithmetic, but I could not make it behave linearly.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2021-01-12
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