New CC 10a BEC died as soon as ESC switched on

[83imp]

I was getting close to finishing my Yeti XL and wanted to test my servo and center it so I could bolt the servo horn down.

I plugged my batteries in (4s total), turned it on and it's dead(ish) and putting out a whopping .28v instead of the 7v I programmed it to with the Castle link. I was using a Holmes bypass with the BEC, but the ESC, servo and receiver all work when I take the BEC out of the equation.

Anyone tried the larger Hobbywing Becs? I've used the 3a on smaller stuff, but none of their higher amp models.

Sent from my Motorola DynaTAC

[SkiSteve]

You need to disconnect the Bec in the esc. Remove the red wire from the esc to the receiver or you have yourself a short with 2 Bec connected to the same circuit

[SkiSteve]

Sorry I misunderstood the bypass. Double check all your plugs are the right way around for the gear you are using. You should have only the white signal wire from the receiver connected to the servo with red and black coming only from the cc Bec.

[mikemcE]

Or get a Holmes bypass and make life plug and play !!




Hang up and Drive

[SkiSteve]

Sorry for my misinformed replies! Does the cc Bec give correct voltage with nothing at all connected? Check the connection to the battery also

[malickie]

If you Read what the OP Said and I quote "I was using a Holmes bypass with the BEC", your suggestion has been tried already. My guess is something is not connected correctly, make sure the leads are correct, as in the positive and negative is set correctly from the BEC to the Servo and the ESC, I had issues there as well because the color coding was different on my servo than the Bypass Connectors.

Originally Posted by mikemcE

Or get a Holmes bypass and make life plug and play !!




Hang up and Drive

[83imp]

So, I've checked it over and over and finally cut the input wires to the BEC just behind where I had soldered them and connected the leads directly to one of the 2s batteries connector and still no green light. Connected it to the Castle Link and no green light either so I'm fairly certain it's dead. Emailed Castle so hopefully they'll repair or replace it.

Sent from my Motorola DynaTAC

[83imp]

Update: I finally had time to go look at it (long story, sold house and in apartment nowhere near my RC's or bikes until house closes and driving me nuts) and now I'm more confused.

I just happened to catch the BEC lighting up when I plug in the first battery. When I plug the second battery in, it kills the BEC. Banana plugs are in the correct holes and the ESC is new out of the box minus where I soldered the BEC in.

Everything (receiver, esc, motor and servo) works when I hooked up traditionally without the BEC. Bec only lights up when one battery is plugged in and dies as soon as the other is plugged in.

Here's a picture in case I screwed up the wiring. One battery is plugged in and although the BEC is blurry, the green light is glowing in the pic. Can't wait to get this figured out and put the rats nest of wiring back in the receiver box.



Sent from my Motorola DynaTAC

[TacoCrawler]

so yer running dual 2s wired in a series

The BEC should be wired in, not on just the single battery,
but at the other end where both batteries have been combined into one.

Try that and report back.
Hopefully the BEC is not already toast.

I had one CC BEC I wired incorrectly and shorted momentarily.
It killed it... but I thought it was still working because...
I was still able to set it to 7.4 on the USB program.

But came to realize I had fried the BEC's internal voltage regulator
and it was actually putting out 12+ volts
Fried 3 servos not realizing my error.

Do not trust the USB programming to see an error with the BEC.
It doesn't.
And just because the power led is lit... and working...
does not mean the voltage is set nor regulating correctly.

That is why you should check the BEC's output voltage manually,
using a voltmeter first, before plugging in the servo.

Be sure both battery's share the same voltage and capacity.
And charge them individually not when combined.

BEC wired into the speed controller side of the series harness in this v diagram.

[JatoTheRipper]

Originally Posted by mikemcE

Or get a Holmes bypass and make life plug and play !!

I bought one of these, but haven't used it. I've always wondered how it's plug and play? I've never seen a BEC of any kind come with JST servo plugs on both the input and output sides.

[mikemcE]

Silly rabbit, you need a deans or other batt plug to power in, don't think jst is 10a rated .

Output is standard making for plug and play.



Hang up and Drive

[Perkul8r]

You still need to wire the bec into battery leads but makes it plug and play between receiver, bec, and servo


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[JatoTheRipper]

I see. That bypass adapter is not what I thought it was.

[mikemcE]

Purpose is so you can run your servo at say 8.4v and leave the esc red wire intact and putting out that 5.1v for your rx


Hang up and Drive

[JatoTheRipper]

Originally Posted by mikemcE

Purpose is so you can run your servo at say 8.4v and leave the esc red wire intact and putting out that 5.1v for your rx


Hang up and Drive

Yeah I see that now. I was thinking it was a way to avoid soldering the BEC to ESC.

[TacoCrawler]

I wanted to post a picture here
regarding utilizing/installing an external BEC along with the HH's "Y" RX by-pass.

But I've been reprimanded in the past for posting too large of pictures on this forum.

I have attempted to downsize my pictures using photobucket
and even changed the download size by altering the photobucket upload size.
Choosing photobucket's 800 X 600 upload size.

So hopefully this change to my photobucket acct. uploading works.
As I am attempting to conform to the rules set forth by this forum and enforced by it's moderators.

Possibly this picture can offer some useful insight/help
to those whom are attempting to utilize/wire up an external BEC
along with the Holmes Hobbies "Y" RX by-pass adapter.




moderators: if this is still too large for the rules of this forum...
please let me know.