Help a noob? Please. BEC, ESC, New Servo for Flux.

[suicideneil]

Originally Posted by knuckle

I wish I knew what I was doing.

Any help appreciated.

It's your lucky day:



The esc outputs 6v to the rx and servo normally, so you would indeed need to use an external BEC to power the servo directly to give it more than that; unless you have a HV rx then you can't just feed more than 6v to it ( and the servo ) otherwise the rx will go pop.

Nice simple wiring though, just grab a cheap rx connector or pig tail to get the extra connector you need ( you can just plug the signal wire and pin directly into the rx, bit it's rather fiddly ).

For a BEC, I would suggest the Castle 6s 10amp BEC- there are others around though it's hard to find one that will output more than 3-5amps and 6v.

[knuckle]

Thanks my question is though, if my servo does 7.4 volts, and you said the Castle BEC in the link, which I have only does 6v max?

The link says it does more.

djustable Output Voltage
4.8V to 9 volts.


So if my servo handles 7.4V, I use the castle link to set the BEC to 7.4 correct? I don't need to disable the BEC on the ESC either right? There's no power going out of it anyhow to the receiver.

I did get a Spectrum radio system, which has a receiver that can handle the higher voltage.

[_paralyzed_]

Yes, use the castle link to adjust the output of the bec.

Since you have a spectrum rx you could just wire it directly to the rx (NO bec) and pull the red wire from the esc. This would be the easiest way.

If you do as suicideneil diagramed you are correct, you leave the red wire from the esc intact.

[knuckle]

Originally Posted by _paralyzed_

Yes, use the castle link to adjust the output of the bec.

Since you have a spectrum rx you could just wire it directly to the rx (NO bec) and pull the red wire from the esc. This would be the easiest way.

If you do as suicideneil diagramed you are correct, you leave the red wire from the esc intact.

Not sure what you mean. You said wire what to the RX?

I'm just wondering why in all the other diagrams I've seen, the wire from the ESC > RX, the red wire removed.

The settings on my ESC are adjustable, but you can't turn the ESC BEC off, the lowest it will go is 5V.

So I'm just wondering if sending 5V to the RX from the ESC, plus the 7.4V from the external BEC will be too much for the receiver.

[knuckle]

Guys, in the lower right of this, it's saying not to wire it the way you showed in the diagram?

[suicideneil]

Originally Posted by knuckle

Guys, in the lower right of this, it's saying not to wire it the way you showed in the diagram?

That applies only if you are using 6s lipo total; if you are using 4-5s, then it's fine.

If you are using 6 lipo however, then just wire the bec to one of the batteries to get power, not both ( like the larger diagram shows ).

If your rx is capable of more than 6v input however ( hv model ), then you can just do like Harold ( paralyzed ) said and connect the external BEC directly to the rx, set for 7.2v, then remove the small red wire from the escs rx cable to disable the escs built-in bec circuit:



the external bec will power the rx & servo in this case, the esc just sends the signal to control left & right + throttle.

[knuckle]

Man this is getting more confusing by the minute. I went and wired the external BEC as the original diagram here. I'm using two 3S batteries = 6S total.

My servo is 7.4V and my receiver, which is a spectrum, can handle 9.6V