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If anyone saw my last instructable "Simple Li-Ion Battery Power Tester" they can now upgrade to a computerized hi-tech version that is capable of mea...
This is the graph you can get from the text file sent to the PC during drain cycle.
I really wanted to get this Diecimila copy Arduino board bit it took me ~2 weeks to get it by mail so I just had to start fast with my own bread-board...
I basically took junk apart and added the components one by one ...most of the information can be found in the Arduino web page :http://arduino.cc/en/...
it was fairly simple to add a FET with "on" resistance of ~8mOHM (no barly any power disipation on it) and a 2.2 10W resistor .I connected two A/D pin...
So I also connected and LCD (which I took apart from some other junk) and found the data-sheet on the net + a cool driver from the Arduino web page an...
It will detect if it is NiMH/NiCD or Li-ION by the voltage range .And then start the discharge cycle.
The discharge can take anywhere from 30-120 minuets depending on batery capacity but at the end you get a true indication of battery capacity / qualit...
very simple with the 2 A/D connected on the two sides of the resistor /Vr=Vbat-Vfet.
// include the library code:#includeLiquidCrystal lcd(12, 11, 5, 4, 3, 2);// initialize the library with the numbers of the interface pinsint sensorPi...
All the schematics for arduino can be found on the Arduino web page (step 2).you can Also find how to connect standard LCDs on the same site so no nee...
All and all prototype Breadboard and then moving it to a box and soldering it all together took me two weeks (night work 3-4 hours a day)Thanks you fo...
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