12v to 7.2v Voltage Regulator - Electronic Circuits Projects Diagrams Free

jimbo93 · 19th November 2007, 02:35 AM

I need a voltage regulator from 12v DC to 7.2v DC. My source is a 12v sealed lead acid battery. I need to convert it to work with my 7.2v DC JVC Camcorder. Could I buy one? If so where? If not, how would I go about making one?

Andy1845c · 19th November 2007, 03:20 AM

What kind of current do you need? An LM317 in an adjustible voltage regulator that should give you 7.2v no problem with a 12v supply and can handle up to 1.5 amps.

You can buy them just about anywhere that sells electronic parts. They are very common. You will also need some resistors to set the voltage at 7.2v

Look up LM317 here:http://www.datasheetcatalog.com to see how one is wired.

You might want to use a potentiometer as opposed to a fixed resistor to set the voltage. This will allow you to get it at exactly 7.2v. You could then either measure its resistance and replace it with a resistor of fixed value, or glue the potentiometer so it dosn't move.

aussiepoof · 19th November 2007, 04:11 AM

For decent current output (3-5A) and cool running I'd really suggest a switchmode power supply. They sound scary, but the NatSemi range of Simple Switchers(tm, no doubt) need an IC, a schottky diode, an inductor and a capacitor... simple!!

Other switchmode ic's are similar and might have lower drop-out which may be important to you if the 12v is coming from a battery.

P.

jimbo93 · 19th November 2007, 04:51 AM

I need a DC current..........

aussiepoof · 19th November 2007, 05:32 AM

Hi Jimbo... sorry for confusing and/or scaring you! LOL

What you need is a power supply designed to run off an automobile battery which will power your camcorder. Your camcorder will have a specification for the DC amps it needs @7.2vdc to run and you should buy a power supply that can deliver that much current.

I know others here will shudder, but if you're in the US then I'd suggest going to Radio Shack with your camcorder so they can help you.

If you're not in the US, then tell us where you are and someone will be able to help (I'm in Australia for instance.)

P.

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19th November 2007, 02:35 AM	(permalink)
jimbo93	12v to 7.2v Voltage Regulator I need a voltage regulator from 12v DC to 7.2v DC. My source is a 12v sealed lead acid battery. I need to convert it to work with my 7.2v DC JVC Camcorder. Could I buy one? If so where? If not, how would I go about making one?

19th November 2007, 03:20 AM	(permalink)
Andy1845c	What kind of current do you need? An LM317 in an adjustible voltage regulator that should give you 7.2v no problem with a 12v supply and can handle up to 1.5 amps. You can buy them just about anywhere that sells electronic parts. They are very common. You will also need some resistors to set the voltage at 7.2v Look up LM317 here:http://www.datasheetcatalog.com to see how one is wired. You might want to use a potentiometer as opposed to a fixed resistor to set the voltage. This will allow you to get it at exactly 7.2v. You could then either measure its resistance and replace it with a resistor of fixed value, or glue the potentiometer so it dosn't move. __________________ This message transmitted on 100% recycled electrons Last edited by Andy1845c; 19th November 2007 at 03:25 AM.

19th November 2007, 04:11 AM	(permalink)
aussiepoof	For decent current output (3-5A) and cool running I'd really suggest a switchmode power supply. They sound scary, but the NatSemi range of Simple Switchers(tm, no doubt) need an IC, a schottky diode, an inductor and a capacitor... simple!! Other switchmode ic's are similar and might have lower drop-out which may be important to you if the 12v is coming from a battery. P.

19th November 2007, 04:51 AM	(permalink)
jimbo93	I need a DC current.......... Last edited by jimbo93; 19th November 2007 at 04:53 AM.

19th November 2007, 05:32 AM	(permalink)
aussiepoof	Hi Jimbo... sorry for confusing and/or scaring you! LOL What you need is a power supply designed to run off an automobile battery which will power your camcorder. Your camcorder will have a specification for the DC amps it needs @7.2vdc to run and you should buy a power supply that can deliver that much current. I know others here will shudder, but if you're in the US then I'd suggest going to Radio Shack with your camcorder so they can help you. If you're not in the US, then tell us where you are and someone will be able to help (I'm in Australia for instance.) P.