Update: 3.3V vs. 3V dilemma
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From: Michael A. Terrell on 13 Mar 2010 01:57 David Nebenzahl wrote: > > To bring this little saga to a close, I built a little AC adapter for my > Fuji Finepix digicam: brought in 5 volts from a little Samsung wall > wart, put the regulator and an electrolytic cap in a film can on a > little piece of perfboard, and brought the power out to a 2.5mm power > mini jack. > > The long and short of it is, the camera doesn't work on this supply. It > puts out 3.25 volts alright, even when plugged into the camera, but the > camera just sits there and does nothing. My suspicion is that the power > jack is just not quite the right size to make contact (or else there's > something screwed up inside the camera that makes it not accept external > power, which seems unlikely). > > So I'll probably bite the bullet and shell out a little $ to buy the AC > adapter made for this camera (found one on the internets for about $12). > > The camera itself (bought for $1 at Oakland's White Elephant sale) works > like a charm; just got the USB cable for it today ($4.75). What is the current rating of the AC adapter? Fuji recommends a 2 amp, 5 volt supply for my Fuji Finepix S5200 camera. -- Lead free solder is Belgium's version of 'Hold my beer and watch this!'
From: David Nebenzahl on 13 Mar 2010 14:25 On 3/12/2010 10:57 PM Michael A. Terrell spake thus: > David Nebenzahl wrote: > >> To bring this little saga to a close, I built a little AC adapter for my >> Fuji Finepix digicam: brought in 5 volts from a little Samsung wall >> wart, put the regulator and an electrolytic cap in a film can on a >> little piece of perfboard, and brought the power out to a 2.5mm power >> mini jack. >> >> The long and short of it is, the camera doesn't work on this supply. It >> puts out 3.25 volts alright, even when plugged into the camera, but the >> camera just sits there and does nothing. My suspicion is that the power >> jack is just not quite the right size to make contact (or else there's >> something screwed up inside the camera that makes it not accept external >> power, which seems unlikely). >> >> So I'll probably bite the bullet and shell out a little $ to buy the AC >> adapter made for this camera (found one on the internets for about $12). >> >> The camera itself (bought for $1 at Oakland's White Elephant sale) works >> like a charm; just got the USB cable for it today ($4.75). > > > What is the current rating of the AC adapter? Fuji recommends a 2 > amp, 5 volt supply for my Fuji Finepix S5200 camera. Yeah, I've seen that too. But the camera says "3V 2.5W", which should be fine with my 1 amp supply in theory. Besides, I see absolutely no voltage sag on my VOM when I connect the camera and try to turn it on, which seems to indicate no connection (if the supply were being overloaded, I'd expect to see some sag). -- You were wrong, and I'm man enough to admit it. - a Usenet "apology"
From: Michael A. Terrell on 13 Mar 2010 18:22 David Nebenzahl wrote: > > Yeah, I've seen that too. But the camera says "3V 2.5W", which should be > fine with my 1 amp supply in theory. What model number? -- Lead free solder is Belgium's version of 'Hold my beer and watch this!'
From: Michael A. Terrell on 13 Mar 2010 19:02 David Nebenzahl wrote: > > On 3/12/2010 10:57 PM Michael A. Terrell spake thus: > > > David Nebenzahl wrote: > > > >> To bring this little saga to a close, I built a little AC adapter for my > >> Fuji Finepix digicam: brought in 5 volts from a little Samsung wall > >> wart, put the regulator and an electrolytic cap in a film can on a > >> little piece of perfboard, and brought the power out to a 2.5mm power > >> mini jack. > >> > >> The long and short of it is, the camera doesn't work on this supply. It > >> puts out 3.25 volts alright, even when plugged into the camera, but the > >> camera just sits there and does nothing. My suspicion is that the power > >> jack is just not quite the right size to make contact (or else there's > >> something screwed up inside the camera that makes it not accept external > >> power, which seems unlikely). > >> > >> So I'll probably bite the bullet and shell out a little $ to buy the AC > >> adapter made for this camera (found one on the internets for about $12). > >> > >> The camera itself (bought for $1 at Oakland's White Elephant sale) works > >> like a charm; just got the USB cable for it today ($4.75). > > > > > > What is the current rating of the AC adapter? Fuji recommends a 2 > > amp, 5 volt supply for my Fuji Finepix S5200 camera. > > Yeah, I've seen that too. But the camera says "3V 2.5W", which should be > fine with my 1 amp supply in theory. Besides, I see absolutely no > voltage sag on my VOM when I connect the camera and try to turn it on, > which seems to indicate no connection (if the supply were being > overloaded, I'd expect to see some sag). You may not see it without using a scope. A lot of regulation problems don't show up with a meter, when you're right on the edge. :( -- Lead free solder is Belgium's version of 'Hold my beer and watch this!'
From: Franc Zabkar on 14 Mar 2010 17:21
On Thu, 11 Mar 2010 21:38:02 -0800, David Nebenzahl <nobody(a)but.us.chickens> put finger to keyboard and composed: >To bring this little saga to a close, I built a little AC adapter for my >Fuji Finepix digicam: brought in 5 volts from a little Samsung wall >wart, put the regulator and an electrolytic cap in a film can on a >little piece of perfboard, and brought the power out to a 2.5mm power >mini jack. > >The long and short of it is, the camera doesn't work on this supply. It >puts out 3.25 volts alright, even when plugged into the camera, but the >camera just sits there and does nothing. My suspicion is that the power >jack is just not quite the right size to make contact (or else there's >something screwed up inside the camera that makes it not accept external >power, which seems unlikely). I had the same problem with a Kodak camera. However, I never bothered to determine the cause, as I scored a cheap dock. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |