On 7/19 Shaun Canning wrote: "An optimal solution would have been for Pentax too release the *ist D with a proprietry Li-ion rechargeable battery simalar to those used in other Pentax digital cameras"
Then we would have another PDML thread about those darn expensive Pentax Li-ion rechargeable batteries & why didn't Pentax do something else battery wise. Kenneth Waller -----Original Message----- From: "Dr. Shaun Canning" <[EMAIL PROTECTED]> Sent: Jul 19, 2004 4:31 AM To: [EMAIL PROTECTED] Subject: Re: *ist D and Power sources I disagree. The CR-V3 rechargeables are not the 'optimal' solution at all. An optimal solution would have been for Pentax too release the *ist D with a proprietry Li-ion rechargeable battery simalar to those used in other Pentax digital cameras. Then again, a fuel cell might be nice... Cheers Shaun El Gringo wrote: >*Rechargeable* CR-V3's are the optimal solution. Yes they're pricey to get, >at about 25 bucks EACH. Thats 150+ once you factor in the chargers, but, >they have nearly the lifespan of a CR-V3, and more importantly, they provide >FULL POWER even when only half charged... This is not the case with NiMH >batteries whose voltage will slowly tail off until they run completely out. > >-el gringo > >-----Original Message----- >From: Mark Roberts [mailto:[EMAIL PROTECTED] >Sent: Sunday, July 18, 2004 6:44 PM >To: [EMAIL PROTECTED] >Subject: Re: *ist D and Power sources > > >"Rob Studdert" <[EMAIL PROTECTED]> wrote: > > > >>On 18 Jul 2004 at 15:03, Tanya Mayer Photography wrote: >> >> >> >>>BTW, I posted this once before, but I'm not sure if anyone noticed. I >>>"discovered" that the AC Adapter for the MUVO works perfectly with the >>>*istD! I haven't found anywhere that I can buy the AC Adapter that is >>>supposedly available to suit the camera, so one night, I got brave and >>>risked blowing up my camera by plugging the MUVO adapter in. I used it >>>solidly for 4 hours and it worked like a dream! I have used it many >>> >>> >times > > >>>since, with no bad side effects (well, none to my knowledge)... >>> >>> >>LOL. Dare-devil. >> >>I just checked the Muvo PSU, it's rated to provide 5VDC @ 280mA, the camera >>specification are 6.5VDC therefore you probably won't cause damage but I'm >>surprised it worked. >> >> > >I'm not. Using the ist-D with 4 NiMH batteries (1.25 Volts each) >provides 5 Volts total so we know the camera can operate from that >Voltage. Computer-driven portable devices like the ist-D typically use >many individual switching power supply chips (they're really tiny now) >and don't rely on the raw power supply input for any of their >subsystems. As long as the outboard supply can provide sufficient >current it should be fine through a wide range of voltages. What's more, >since the MUVO power pack is probably itself a switching supply, its >failure mode is almost certainly going to be zero volts, rather than >full unregulated voltage, like a linear power supply. In all likelihood, >if there ever *is* a problem with the MUVO supply, it'll just go into >over-temperature or over-current shutdown. No drama (but no power, >either!) > >-- >Mark Roberts >Photography and writing >www.robertstech.com > > > > -- _____________________________________________ Dr. Shaun Canning P.O. Box 21, Dampier, WA, 6714, Australia. m: 0414 967644 http://www.heritageservices.com.au [EMAIL PROTECTED] _____________________________________________ ________________________________________ PeoplePC Online A better way to Internet http://www.peoplepc.com
