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Author Topic: Voltage stepdown 22.2V to 12V  (Read 1340 times)

essex2visuvesi

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Voltage stepdown 22.2V to 12V
« on: June 07, 2012, 12:27:21 PM »

what would be the best way to do this?

I want to fit some lights and a sound unit to my Huntsman.  Problem is what I have in mind require a 12V DC supply and my drive batteries are 6S lipos (22.2V nominal)

Should I use one of these?
http://www.hobbyking.com/hobbyking/store/__18788__12V_4_5A_UBEC_2_5S_Lipoly_12_23v_.html

or a seperate accessory battery?
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ACTion

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Re: Voltage stepdown 22.2V to 12V
« Reply #1 on: June 07, 2012, 01:01:12 PM »

Switch mode UBEC units are 'noisy' electrically, even when suppressed, and would likely interfere with a sound system. I would always advise using a separate 12v battery where possible; it's nice and clean as a power source.
DM
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essex2visuvesi

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Re: Voltage stepdown 22.2V to 12V
« Reply #2 on: June 07, 2012, 02:18:48 PM »

would a 1000mah 11.1V lipo do it?... got some in the battery box for the Trex 250 and they aint that heavy
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Re: Voltage stepdown 22.2V to 12V
« Reply #3 on: June 07, 2012, 06:10:59 PM »

It depends on the current drawn by your sound system. 1AH should be OK for most types. Give it a go and if it craps out after half an hour then go for a bigger capacity pack - no point in buying something new without trying what you already have.
DM
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malcolmfrary

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Re: Voltage stepdown 22.2V to 12V
« Reply #4 on: June 07, 2012, 07:23:02 PM »

Dont forget to use a battery protector to shut it off as the battery discharges - most amplifiers don't come fitted, but are perfectly capable of running a LiPo too low to survive.  A separate battery is still the best way to go.
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