Yeh, I could easily go out and buy one, but where is the fun in that!?
I made a charger using a TI BQ2031 IC
Funny you should say that. I've actually got a free sample in the post as we speak. I also came across it in my research and it looks really neat! I'm planning on testing it too, however, I really wanted to be able to control everything through the Arduino rather than using R-C networks to configure the IC. Nevertheless, I'd love to see the schematic from your charger!
It was my hope that I could use the Arduino to basically mimic that same charging algorithm that the BQ2031 uses.
First, read this: The RV BATTERY CHARGING PUZZLE « HandyBob's Blog
Thanks kev_rm, that link was really useful and informative too!