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Old Aug 15, 2012, 12:48 PM
AcroFPV is offline
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Question

Can I run my KK2 board & ESC's off my Bench Power Supply?


I just hacked an old PC Power supply to run my charger. I got rid of the 3.3v, but kept the 5v & 12v lines. The power supply is an older 230watt ATX that says 18amps on 12v. Not sure the amps on the 5v.

For testing and balancing i thought it might be easier to just wire my electronics to the PC power supply instead of charging and using one of my 3s.

The ESC's will be Turnigy Plush 30A.
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Old Aug 15, 2012, 02:02 PM
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yes
Old Aug 15, 2012, 03:53 PM
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well you definitely cant go full throttle (or anywhere near that) because the max output is 18A. it would work for very basic setup.
Old Aug 15, 2012, 04:23 PM
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Thanks. Im kind of bummed cause I have a 430watt PC power supply that shows 12v @ 22amps, but i cant get that thing to power on. Out of 3 "extras" this was the only one that worked.

I do plan on upgrading to a larger power supply later, but I am hoping for now this will do.
Old Aug 15, 2012, 04:28 PM
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Originally Posted by subaru4wd View Post
Thanks. Im kind of bummed cause I have a 430watt PC power supply that shows 12v @ 22amps, but i cant get that thing to power on. Out of 3 "extras" this was the only one that worked.
Have you connected the green wire to ground?
Old Aug 15, 2012, 04:39 PM
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just use your :iPos. as long as you charge them properly and dont let them go empty, you'll be fine.
Old Aug 15, 2012, 04:49 PM
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Have you connected the green wire to ground?
Yup.

Two different grounds to be safe, but it wouldnt kick on... just let out a slight "wheeeze" and spun the fan for a second when switched off.
Old Aug 15, 2012, 04:51 PM
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did you have a load on it when you turned it on ( the green and black). some newer PSUs wont turn on unless a load is present.
Old Aug 15, 2012, 04:53 PM
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did you have a load on it when you turned it on ( the green and black). some newer PSUs wont turn on unless a load is present.
Yeah, was about to post this ^

A car tail bulb across a 12V line works well.
Old Aug 15, 2012, 05:15 PM
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did you have a load on it when you turned it on ( the green and black). some newer PSUs wont turn on unless a load is present.
I connected a spare HDD to one of the power connectors.
Old Aug 15, 2012, 07:14 PM
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so it works?

you could just connect the quad, then power up.
Old Aug 15, 2012, 07:53 PM
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This sounds like a bad idea, a quad can easily pull hundreds of watts with a quick slip of the throttle. That will overload most PC supplies. They are not designed to be overloaded like say a proper bench top power supply.
Old Aug 15, 2012, 11:52 PM
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This sounds like a bad idea, a quad can easily pull hundreds of watts with a quick slip of the throttle. That will overload most PC supplies. They are not designed to be overloaded like say a proper bench top power supply.
What about just one ESC & Motor?
Old Aug 15, 2012, 11:55 PM
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What about just one ESC & Motor?
It depends on the motor, if it's more than a 230watt motor, then you may be in trouble.
Old Aug 16, 2012, 05:01 AM
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Nah, it'll be fine, you'll never pull hundreds of Watts on the bench, there's nowhere for the power to go.


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