RCCrawler Forums

GB's 05 · 11-23-2009, 10:03 AM

If my receiver has an internal bec How would I or can I use my cc bec?

JeremyH · 11-23-2009, 10:15 AM

It would be your ESC that has an internal BEC. To disable the internal BEC of the ESC, just pull out the red wire.

clockworks · 11-23-2009, 10:16 AM

Receivers don't have an internal BEC - they get their power from the BEC in the ESC, or from an external BEC or battery.

Simplest way to connect a CC BEC is to pull the red wire from the ESC > receiver plug, then connect the CC BEC to a spare port on the Rx - doesn't matter which port, as the red and black wires (+ and -) are common to all the port

GB's 05 · 11-23-2009, 01:41 PM

my rx says... 2015 b.e.c. receiver right on the rx. the in small print it says battery eliminator circuit. it is from traxxas.

Jeep-Power · 11-23-2009, 01:45 PM

I know that I have a Futaba receiver that has the same thing on it-- not exactly sure what it means. I know it worked great when I had it hooked straight up to my 7.4V 6cell NiMh.

GB's 05 · 11-23-2009, 01:59 PM

I switched to this rx/tx so it would be more easy for my kid to drive. My servo lasted all of one min. thats why I want to use a cc bec.

Failedabortion · 11-23-2009, 02:17 PM

It means you can use the bec from your esc to power the rx instead of having a separate rx battery pack hooked up to it.

I would suggest the ccbec over using the esc's bec, Don't forget to pull the red wire if you go this route

GB's 05 · 11-23-2009, 02:44 PM

Thats what I'm hoping. thanks.

JeremyH · 11-23-2009, 03:11 PM

Is this the one that you are asking about:
http://www3.towerhobbies.com/cgi-bin...?&I=LXJM12&P=7
??

I cant find any additional info about it on the Traxxas website...and I've never heard of the Rx having a BEC....

clockworks · 11-24-2009, 12:54 AM

Quote:

Originally Posted by GB's 05

my rx says... 2015 b.e.c. receiver right on the rx. the in small print it says battery eliminator circuit. it is from traxxas.

You are correct - this Rx does indeed have a built-in BEC. It's designed for use on models that use a mechanical speed controller, like the really old Tamiya kits. Didn't know you could still buy things like this.

Pull the red wire from the ESC to Rx plug, and run red and black wires from the battery direct to the "batt" port on the Rx. Should work fine without an external BEC, as this Rx is designed to run 2 servos (one for steering, one for the mechanical speedo).
I'm guessing that it was the red ESC to Rx wire that confused the BEC and blew your servo.

GB's 05 · 11-24-2009, 01:03 AM

Yep thats the one. I can't find any info eiyher.

GB's 05 · 11-24-2009, 10:19 AM

So lets see if I understand. I need to clip the red wire going to the rx from the esc. Then to wire in the cc bec I need to run the signal wire from the servo to the rx. Then the + and - from the cc bec to the servo. Ten take a + and - to the battery port on the rx.

clockworks · 11-24-2009, 10:24 AM

Sounds about right.

The important thing is that everything gets power from just one source.

GB's 05 · 11-24-2009, 10:42 AM

Now which wire is the signal wire on an airtronics 94780m? I don"t have it yet. It in the mail.

clockworks · 11-25-2009, 01:42 AM

Signal wire is the yellow or white wire

GB's 05 · 11-25-2009, 06:47 AM

thanks clockworks

GB's 05 · 11-26-2009, 02:11 AM

Game over. What fried the servo fried the receiver also.

11-23-2009, 10:03 AM	#1
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	receiver? If my receiver has an internal bec How would I or can I use my cc bec?

11-23-2009, 10:15 AM	#2
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	It would be your ESC that has an internal BEC. To disable the internal BEC of the ESC, just pull out the red wire.

11-23-2009, 10:16 AM	#3
clockworks Rock Crawler Join Date: Feb 2008 Location: UK Posts: 818	Receivers don't have an internal BEC - they get their power from the BEC in the ESC, or from an external BEC or battery. Simplest way to connect a CC BEC is to pull the red wire from the ESC > receiver plug, then connect the CC BEC to a spare port on the Rx - doesn't matter which port, as the red and black wires (+ and -) are common to all the port

11-23-2009, 01:41 PM	#4
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	my rx says... 2015 b.e.c. receiver right on the rx. the in small print it says battery eliminator circuit. it is from traxxas.

11-23-2009, 01:45 PM	#5
Jeep-Power Quarry Creeper Join Date: Jul 2007 Location: Fort Mill, SC Posts: 349	I know that I have a Futaba receiver that has the same thing on it-- not exactly sure what it means. I know it worked great when I had it hooked straight up to my 7.4V 6cell NiMh.

11-23-2009, 01:59 PM	#6
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	I switched to this rx/tx so it would be more easy for my kid to drive. My servo lasted all of one min. thats why I want to use a cc bec.

11-23-2009, 02:17 PM	#7
Failedabortion Rock Crawler Join Date: Feb 2009 Location: Surprise, Az Posts: 848	It means you can use the bec from your esc to power the rx instead of having a separate rx battery pack hooked up to it. I would suggest the ccbec over using the esc's bec, Don't forget to pull the red wire if you go this route

11-23-2009, 02:44 PM	#8
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	Thats what I'm hoping. thanks.

11-23-2009, 03:11 PM	#9
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Is this the one that you are asking about: http://www3.towerhobbies.com/cgi-bin...?&I=LXJM12&P=7 ?? I cant find any additional info about it on the Traxxas website...and I've never heard of the Rx having a BEC....

11-24-2009, 01:03 AM	#11
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	Yep thats the one. I can't find any info eiyher.

11-24-2009, 10:19 AM	#12
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	So lets see if I understand. I need to clip the red wire going to the rx from the esc. Then to wire in the cc bec I need to run the signal wire from the servo to the rx. Then the + and - from the cc bec to the servo. Ten take a + and - to the battery port on the rx.

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11-24-2009, 10:24 AM	#13
clockworks Rock Crawler Join Date: Feb 2008 Location: UK Posts: 818	Sounds about right. The important thing is that everything gets power from just one source.

11-24-2009, 10:42 AM	#14
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	Now which wire is the signal wire on an airtronics 94780m? I don"t have it yet. It in the mail.

11-25-2009, 01:42 AM	#15
clockworks Rock Crawler Join Date: Feb 2008 Location: UK Posts: 818	Signal wire is the yellow or white wire

11-25-2009, 06:47 AM	#16
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	thanks clockworks

11-26-2009, 02:11 AM	#17
GB's 05 Quarry Creeper Join Date: Oct 2009 Location: Indiana Posts: 235	Game over. What fried the servo fried the receiver also.

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