6 volts too much?

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spyonabird Member Join Date: Apr 2008 Posts: 7	6 volts too much? 09/18/2008 8:35 PM
	Hi All, I want to power an IP camera from a 6-volt SLA battery. The camera uses 5 volts 1 amp. Is the 6 volts too much, running 24/7? Is the tolerance for electronic devices +/- 5%?
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Frank787 Commentator Join Date: Aug 2008 Location: UK Posts: 56 Good Answers: 5	#1 Re: 6 volts too much? 09/19/2008 8:10 AM
	I use a 6Volt SLA for my digital camera, which is marked as 5 volts, so I put a diode (1N4002) in series with it to give about 5 volts at 0.8 Amps. It has worked fine for over 5 years!! You might want to use a 1N5402 as your current is a bit on the limit for a 1 amp 1N4002.
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wangito Guru Join Date: Aug 2006 Location: Santiago Chile. Posts: 845 Good Answers: 7	#2 Re: 6 volts too much? 09/21/2008 7:47 PM
	Hi 1N4007 is about right, Forward voltage drop is 0.7 volt, just enough to bring it down to 5.3V which must be OK. Most of the wall adaptors are ± 5VDC and up so I wouldn't worry about 1V unless you think it is a must. Hope it helps. Wangito. __________________ Never trade luck for skill.
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Sparkstation Guru Join Date: Nov 2007 Location: Christchurch, (The Garden City), South Island, New Zealand Posts: 4395 Good Answers: 230	#3 Re: 6 volts too much? 09/23/2008 3:37 AM
	Hello spyonabird A "6 Volt" SLA Battery actually has approximately 6.64 Volts if fully charged. Lead-Acid cells when fully charged are slightly over 2.2 Volts per cell, and the 6 Volt Battery has 3 cells in series, giving the above terminal voltage. The diode in series with the supply to the camera is cheap and efficient. The diode also acts as a fuse, by open-circuiting if the supply after the diode is short circuited. Many cameras and other electronic equipment have a regulator on the input terminals, but I am unable to advise you re your camera: You would need to contact the Makers to see if there was any "overvoltage protection" built into your camera. Kind Regards.... __________________ "The number of inventions increases faster than the need for them at the time" - SparkY
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