Model Boat Mayhem
Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: essex2visuvesi on June 07, 2012, 12:27:21 pm
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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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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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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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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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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.