Art_H

Thanks Ante, that link looks pretty good. The pump is supposed to flow 35 gal @ 5.8A. 12v What kind of current spike can I expect on start-up? And can I use the PWM at a lower draw initialy to cancel some of the higher spike? Art

I have an elec water pump that I want to modulate water flow. (ie. pump RPM) -DC brush motor -12-14v -12A max -no reverse or braking required From all I have gathered so far, PWM looks like the best method so far. I am looking for direction on some good circuits, and where to look. Or if there is a more efficient method etc. Thanks Art

No one witj info on the trouble codes??

Dang thing after 12 months during play will just stop, then try to read the disc. Displays code H05. I dissassembled to clean and inspect. It then worked fine for a while and is now back to the same issue. Any info on the Panasonic codes would be helpfull. Any info would be helpfull... Thanks, Art

This looks like an amazing site, I just found it today. IBM T23 Li-ion battery. This battery will register as being fully charged, then when in use, 20 min in will immediately register 5% charge. The battery is getting tired, as all things eventually do. Right? Well, not wanting to pay the price of an all new pack, I looked into renewing the cells. Well after doing a little research on the Li-ion batts, ( from this great site, I might add) I found out that cell discharge stops @ 2.3v/cell via the "smart" tech in the pack. However, the per cell voltage in my "dead" pack is 3.96v. I watched the battery monitor on windows indicate the power drop, yet when my multimeter is showing 3.7v/cell under load with the laptop speakers playing music, I et 'kinda suspicious. What gives? Are the batts. toast? Or is it the circuit board? Or what... Any way I can easily test the batts. for health? Thanks for your help... Art