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Jan 11, 2010, 10:59 PM
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Surg's Avatar
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Marine Battery charger as a power supply? Scope readings.

Since I had a spare marine Charger laying around I decided to try to use it as a power supply for my Hyperion EOS1615i DUO3.

The problem is that it bleeds a small amount of AC out the 12V DC output.
I'm worried about hurting my Hyperion charger, and my LiPo's, so I only ran it like this for testing.

I ended up putting a 12V 80AH Gel battery on the circuit to act as a filter for the time being, and this effectively filtered out most of the AC...

Here are the pics of the set up.

The PS DC output at rest with no load on the Hyperion Charger.

The PS DC output with the Hyperion charging one of my 5000mah 6S Lipos.

The Hyperions output to my 6S 5.0 LiPo...

I would like to use this without the battery (as a filter), but I have a feeling this is unacceptable.

Any thoughts?
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Jan 11, 2010, 11:25 PM
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earlwb's Avatar
Battery chargers don't need filter capacitors on the output. So you need to add some to yours to use it as a power supply.
All Electronics has some 22,000 ufd caps, you can hook up two in series to double the max voltage rating, but it halves the capacitance down to 11,000 ufd when you do it.
BG Micro is another place you can check out too:
Jameco is another nice surplus store too:

The regular stores like have even better caps, but they are much more expensive than the surplus ones.
Jan 11, 2010, 11:41 PM
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Surg's Avatar
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How many UFD do you recommend?
So like 15 volt caps?

Man I was picturing something bigger. Less then 2" H & W is small.

I don't need to raise the voltage capacity since that one is rated for 25V DC right?

The Marine Charger puts out under 14V.
Last edited by Surg; Jan 11, 2010 at 11:53 PM.
Jan 11, 2010, 11:56 PM
Reduce the drama...
rick.benjamin's Avatar
Hook a motorcycle or lawn tractor battery to your charger.
Hook your Hyperion to the battery.
Problem solved.

Turn-off marine charger when not in use.
Jan 12, 2010, 12:35 AM
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Surg's Avatar
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Didn't think of a smaller battery, hmm. I have a few of those I can use....

I'll have to test, and report. Thanks!

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