A project log for Internal Resistance of Lead Acid Batteries

A project to automate the measurement of internal resistance for lead acid batteries to determine if pulse conditioning is of any benefit.

richardrichard 08/13/2017 at 13:232 Comments

While working on a small hardware modification to improve the resolution the obvious improvement hit me: change the display for the ohms so that 200 milliohms reads as 200, not 2.

It was easy but due to the 16 bit maths it required a new word.

V2 of code posted.


richard wrote 08/15/2017 at 04:46 point

Will do. I have built a dual subtractor using a dual opamp which I will write up shortly. This subtracts 10V from the measured voltage ( 2x5v) which will increase my resolution fourfold.

  Are you sure? yes | no

Thomas wrote 08/14/2017 at 12:15 point

Check out my W1209 thermostat project for another way to add resolution. 

  Are you sure? yes | no