>I came up with an "adaptive trickle" which I hope solves most of it. > >However, I'm not clear on how to re-enter fast charge if the user prints a >bunch of stuff. >Voltage isn't a very good indication. > >My concern is that 20-50 amp-seconds are lost in any given print, but my >refill rate is a max of 6 amp/sec per minute. >I don't want to over-trickle though. If you could measure what is taken out you could have the charger put it back in. If not measured, perhaps assumed by seeing a sudden drop in voltage that signals a print operation. Go on high charge to replace the 20-50 amp-seconds then go back to trickle. Barry -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads