AA NiMH Battery Plotter Using Ubuntu
I have many rechargeable 'AA' batteries that I use around the house and some have been a bit flaky lately . I purchased some Japanese made Panasonic's over 10 years ago and the performance have slowly been degrating over the years. I am very impressed on the longivity of these cells but I really wanted to label the batteries which were acting as resistors in some of my devices. I read up on the ADC of the Web-BasicAnalogDigital-v1.4.pdf document and decided to build a rig that would check the voltage of my batteries as I loaded them across a ceramic .1 Ohm resistor. Here are the plots, now I can tell which batteries to weed out.
Oh yeah, I did this all in Ubuntu 10.04
Apps Used:
-Open Office Spreadsheet
-Minicom
-gedit text editer
-BS2 Board
-ADC08318-Bit Serial I/O A/D Converters with Multiplexer Options
-Bstamp Tokenizer (http://bstamp.sourceforge.net)
Oh yeah, I did this all in Ubuntu 10.04
Apps Used:
-Open Office Spreadsheet
-Minicom
-gedit text editer
-BS2 Board
-ADC08318-Bit Serial I/O A/D Converters with Multiplexer Options
-Bstamp Tokenizer (http://bstamp.sourceforge.net)
![AA-NiMh-results.png](https://forums.parallax.com/uploads/attachments/56403/77095.png)
Comments
-Phil
Hi Phil,
Probably not, but at least I know which batteries are not preforming equally under an intense load. I figure a 100-1000K Ohm resistor for 24 hours would be a more accurate representation. But then again, I'd be testing batteries all week.
I guess you can say this test doesn't give an accurate representation of 'how long' the charge is held (due to leakage and other chemistry breakdowns within the battery).
Because this post is in NO WAY a complete project, evidenced by the lack of code, and/or schematics.
I am not trying to attack chiques, this is just me showing an example of a situation where a post is in fact not worthy of the completed title.