Robert Young wrote: > While I don't have any data on my hard drive, I can collect the data > (charge and discharge) curves using my CBA (Computerized Battery > Analyzer) from West Mountain Radio > (http://westmountainradio.com/CBA.htm). Not terribly expensive piece of > equipment and very useful for characterizing batteries and charging > circuits. Looks like a neat bit of kit. I was going to build something similar, but simpler. Basically a voltage/current logger with an RS232 interface. The problem was I wanted a floating input, which isn't exactly hard to do, just a bit expensive. > Right now all I have handy are some 6 cell NIMH packs and a "low" > current charge design (charger pushes maximum of 750mA, battery packs > are rated at 2000mAhr) so it doesn't charge terribly quickly. Like I said, I'm not in a mad rush. The voltage reference ICs arrived this morning (Maxim MAX6034AEXR41-T; 4.096V in an SC70 package) so I'm going to try and hack together a constant-current pulse charger in a bit. Hopefully I'll be able to get some decent test data out of that, assuming I can find a discharged NiMH AA in my "Big Box O' Batteries". Thanks. -- Phil. | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder philpem@dsl.pipex.com | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+100G http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700 256M+40G -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist