Pages: 1 [2]   Go Down
Author Topic: Reading battery  (Read 3152 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Full Member
***
Karma: 1
Posts: 156
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I use a normal resistor (carbon layer), and their temperature coefficient is less than their absolute error (+- 5%).. and 5% is not a problem.
Logged

Offline Offline
Full Member
***
Karma: 1
Posts: 156
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I asking to myself a question: how can do a cordless phone, with a nimh battery, read approx the level of energy? I would like do the same.. smiley-neutral
Logged

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 603
Posts: 33416
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

The point being is that the parameters they use are specifically tied to the chemistry of the battery. Even batteries of the same chemical type have different characteristics depending on the mechanical construction. Having said that the battery characteristics change slowly over time and the number of charge cycles so these sorts of charge indicator are never particular accurate anyway. It's like the range indicator you get in some cars nowadays, a rough indication only.
Logged

Pages: 1 [2]   Go Up
Jump to: