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HelicopterRadio - Servo - Gyro - Gov - Batt › Super nova question
12-19-2003 10:44 PM  13 years agoPost 1
Jesus nut

rrApprentice

Cairns Australia

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I have my Supernova set up so I can use it off my car battery at the field but to use it in my workshop I was wanting to hook it up to my automotive battery charger and use it as a power supply.

Has any one done this or can tell me if this will work ok.

Or should I have the Supernova hooked up to a battery and then have my automotive charger charging that battery. That way the battery will act as a filter in the system.

Any ideas

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12-20-2003 08:21 PM  13 years agoPost 2
circuitman

rrNovice

Forest of Dean, Gloucestershire, UK

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The auto battery charger will not give a smooth enough output, even when connected to a battery the current will fluctuate considerably.
Either use a battery on its own and recharge as required or buy a 12v 10 amp transformer such as the Prolux Ultra power built for the purpose.

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12-20-2003 10:12 PM  13 years agoPost 3
bgotori

rrNovice

Los Angeles, Ca.

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Hey Jesus nut

I wouldn't do it, tried it at my cousins house with a 20 amp charger middle of charging a 3300GP battery it freaked out and the display when whack-o. Had to turn it off for a couple of days, but it came back. I think we got lucky... So I wouldn't try that again. We did it because his kid just got a RC car, and he didn't have a charger yet. So I pulled mine from the car. He was going to try to charge it with the 12V battery charger(3300GP), he's 6 years old thank God we caught him...


Great Flying!!!

Brad Gotori

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12-21-2003 10:09 AM  13 years agoPost 4
Jesus nut

rrApprentice

Cairns Australia

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Thanks guy's. I won't take the risk of frying my new toy and just run it off the battery and use the charger to top it back up again.

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12-22-2003 05:53 PM  13 years agoPost 5
sharam

rrElite Veteran

Northern California - Fly at Morgan Hill Field

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A battery charger is a "current source: and not a "voltage source." A current source will essentially pump a given current though the circuit that it's connected to. I think there is a good chance that attaching an automotive battery charger to your 250s will fry it since it may try to pump more current than the the 250s can take.

You need a "battery source" which will maintain a stable voltage and deliver various levels of current as required by the 250s.

Good idea - as you state - to use the battery for the 250s and then use the charger to recharge the batt.

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12-22-2003 09:12 PM  13 years agoPost 6
MooneyDriver

rrVeteran

Kent, Ohio

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A simple solution

You can also hook the Automotive 12v charger to a lead acid starter battery and run the Supernova off both. A 7AH sealed lead acid battery would be more than sufficient... Just don't leave it connected all winter long.

-Neil

Hey man, why does my lipo get bigger every time I charge it?

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