12v battery powered camera?

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  #1  
Old 12-30-11, 08:09 PM
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12v battery powered camera?

I have a 5 watt 5 volt dc camera,

Is it possible to power this off of a 12 volt battery with just a 12v to 5v stepdown transformer?

also would the battery ah matter? I think its 7.2? think small motorcycle battery.

How long would a battery like that generally last powering the cam?

any help would be greatly appreciated
 
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Old 12-30-11, 08:56 PM
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Transformers only work on AC circuits. You need a DC to DC converter. DC-to-DC converter - Wikipedia, the free encyclopedia. Do a Google to find them. A motorcycle battery is normally 6v or 12v. Amp hour rating of the battery and amps of the camera would determine how long it would work. Divide watts by volts to determine approximate amps.

5 volt is unusual is this a USB powered camera? A DC to DC converter at 5 volts may be a bit hard to find.
 
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Old 12-30-11, 09:30 PM
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search google.com for the words...
12 to 5 volts converter
 
  #4  
Old 12-31-11, 05:12 AM
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If you're good with a soldering kit you could use a LM7805 voltage regulator. You have to properly heat-sink it, and some of the power consumed will be wasted as heat.
 
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