Hybrid Car – More Fun with Less Gas

Data Logger for a Solar System - Page 2

register ::  Login Password  :: Lost Password?
Posted by No Body on September 4, 2013, 2:01 am


Some of the concernes you raise are addressed by this system:


I will often used Dallas/Maxim One-wire devices, if the temps are in a
range that they will deal with..

Then again.. a data logger for an entire Solar System.. That's one big
honkin machine!


Posted by Jim Wilkins on September 4, 2013, 12:12 pm

Neon John's comments seem to apply more to a LabJack than an Arduino.

I've been using an older Radio Shack PC-interfaced multimeter to log  
solar panel output. It's only one slow channel, but it's opto-isolated  
for safety and ground-loop immunity and can read AC or DC voltage and  
current, up to 20A. The newer model also reads temperature. There are  
several less expensive versions on-line.

This decodes the serial data stream:

and here are the bit assignments in English:

I've ordered one of the cheaper ones to see if I can put together a  
3-channel laptop datalogger using the included software or a Basic  
program and a Cardbus dual serial port.

When I was building electric vehicles I used a Campbell Scientific  
datalogger to record test runs.


Posted by Jim Wilkins on September 9, 2013, 1:27 pm
Scratch off the clunky included software which is for one meter only.  
My QBasic test code that reads the older RS meter runs slowly in XP,  
so this will be a DOS project, maybe using the two multimeters as  
opto-isolated current sensors and my DI-194RS datalogger for DC  

Windows 7 includes a 6.22-style DOS that handles NTFS and long  
filenames. I found it while exploring POWERCFG options and piped the  
 >HELP output to a file to start a manual for it.

Posted by Martin Riddle on August 5, 2013, 11:08 pm

Labjack looks good too. I havent personally used them, but I've heard
good things...


Posted by Mr Clarke on August 7, 2013, 7:41 pm

You make it and I`ll make a better one and sell millions of them!  

This Thread
Bookmark this thread:
  • Subject
  • Author
  • Date
please rate this thread