What is a BEC? Do you need one for your servo?
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- เผยแพร่เมื่อ 29 ธ.ค. 2018
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RC has come so far in 4 years. I just picked up the Traxxas BEC kit for my TRX4. Glad I watched this video. I still enjoy your videos to this day. Cheers
Best RC channel, period. Francis you Rock Bro!
You make a lot of useful videos, thanks mate!
Awesomely useful and informative channel you've created. Congrats and thank you. Videos like yours really help with expanding ones comfort zone by reducing the fear and uncertainty of learning while doing. 😁👍
Hello from malaysia... thanks for make a good video..verry helpfull...for newbies like me..ty
Hi Francis.... I knew I had seen you before :-) MTBR of course ... you are doing great there too ;-)
I should've seen this before I stuck in a new servo. I blew up the xl5-hv ESC and had a runaway with the TRX6. Good news is that the TRX6 now has a QR pro 2300 kv and it transforms this rig entirely.
Was your esc shutting off after running the new servo for a bit? I bought a hobbywing fusion and think this will solve my issues
Good info!
Thank you. Yes, this info on BEC's is hard to find.
Hey. I am thinking of getting the trx4 kit, the 1 thing that I don't understand I'd the Bec, the castle your reviewing in this video seems to complicated (needing IBM laptop ,or £50 dongle!!), the part at the end of this video is quite vague ,about the traxxas 2260 Bec, you said you were going to do a video on it but i can't find it ,hmm. Anyway can the 2260 replace the castle and is it less complicated?. Love your vids btw. I've learnt a lot ( apart from Bec lol)
So much for keeping it simple 🤷🏾♂️
You could use the external BEC only for the steering servo and leave the internal BEC to power the transmission and diff servo's.
Exactly! Wiring is available for that configuration. The wiring options are confusing indeed.
So is the castle BEC capable of having a voltage for the receiver and different voltage for the servo? Or does the voltage for both need to be the same? So if my receiver takes 7.4v and my servo takes 6, I need an additional BEC to just power one.
I heard that the bec from the e-revo fits better on a trx4, if u dont run stock esc and engine...?👍
Is that a lead weight on the front of your frame?
Can the Traxxas BEC fit the Traxxas Stampede 4x4?
If I change my motor and esc to brushless would I also need to change my steering servo or could I run the stock brushed servo on my brushless esc?
Putting a reefs 555 in my gladiator would you recommend a bec? I’m using 3s with he hobbywing esc and a Holmes hobby 27t motor
Hello, I enjoy and learn from your videos. My question is do you think you have to take into account amp draw from various servos? Say you put this tra2262 into various Traxxas vehicles and put various high torque servos like a Savox in. Do you just focus on correct voltage or do you think theres servos that can draw too much amperage for it. I'm trying to upgrade my E Revo and Summit trucks steering and wondering if I can use the 2262. Can you run 2 servos on 6v? Thanks
Yes, definitely. If different servos are drawing high loads, at the same time, that is an issue.
The most common case is using a winch while steering. Otherwise, it's mostly a non-issue.
So I installed a 20kg steering servo on my trx4 sport without the bec and had no issues. Then I installed the traxxas bec and now I’m having glitching issues where throttle and steering independently and or simultaneously cut out. It was like there was transmitter interference, I got up to retrieve the truck and each time it would carry on like no big deal. From 5ft away I’d turn the wheels one direction, let off, and the wheels would stay pointing that direction then correct themselves 5 seconds later and go back to normal. When it’s working correctly, it doesn’t seem that much better than the factory steering servo. It’s better but idk if it’s worth the inconsistent headache. BEC to channel 2, plugged that to BEC, then the 2 prong over to the ESC. Seems pretty cut and dry, idk how I could mess it up if I did 🤷🏼♂️
So are there any esc that I can buy these days that will give the servo a lot more power? When I get a new esc will I have to change anything else out so it will work right? Sorry for all the questions but I am new to the crawler rc world and I just got a redcat gen 8 and the servo is trash on it lol but I really don’t want to have to try and wire up a bec cuz I don’t know how to. I have also heard that when people put stronger servos on the gen 8 it breaks something on the suspension so if any of you rc guys see this can you please help me out by answering these questions it would be much appreciated
So I’m kinda confused as to weather i should get a bec. I have a hobby wing 1080 esc and last week i got a new servo cause mine crapped the bed and the new servo is acting kinda weird. Sometimes when i drive it and im doing something at full turn the servo won’t always go back to center it’s almost like it’s getting stuck but as soon as i go forward or backward it goes back to normal and starts working again. When it’s locked up if i just try to turn it on the controller it won’t till i drive forward or backward alittle. It’s a brushless power hobby servo i believe the model is the 345 model. I’m also wondering if the servo itself might be faulty.
Great video! Why do you say 4.8 volts, I thought the receiver gets 6 volts / 1 amp from the XL5 Esc. How many volts and amps does the external Traxxas BEC give out?
Yea, i also need to know that, hmmm..
HELLO Francis … I need a BEC with multiple different voltage outputs because I need to power 6v, 8v and 11v at the same time and still have a clean setup. I’m looking at the HOBBYWING 10A BEC with 6v/7.4v/8v
“Adjustable” but it’s with a jumper… I’m waiting for replies on if you MUST use the jumper and choose only one voltage or if I can use the terminals individually to power 2 or 3 different accessories with different voltage values at the same time.
Do you know more about that BEC? Can you recommend me a BEC that will do what I need? Thanks plz reply😎
Most ESCs on the market actually put out 6.2V regularly at least for brushless systems and some can be turned up to 7.4
Voltage is only a small part of the game. If you cannot provide the proper current, then it doesn't matter if you can supply 6.2V or 16V from your ESC.
cutting wires on esc etc...would it not just be better to buy a better esc?
Anyone know how much amperage the 4 double a batteries can put out? Asking for a friend with old nitro car....
I purchased a 20kg steering servo like the one you installed in the Bronco in a previous video. I can't find any current draw info for this servo, Will I need a external BEC ? It says in the specs that it produces 20kg of torque at 6 volts.
Current draw is about 3-4 amps at full load. So a BEC will be needed to get the full power of the servo. Without a BEC, it will work fine too.
I have a Power Drive kid galaxy 4x4 monster truck rock crawler ..i lost remote after moving and after research and taking it apart i can not plug and bind a new remote..can u tell me what to do or just sell it?my 4yr old cant wait to uss it but im Almost POSITIVE their is no way to find a remote to power it..thanks in advance..im good with setting up car stereos amps speakers ohms etc...this is new to me
So the factory xl5 only sends 4v to the steering servo? Golly. How the heck does the savox perform on 4v?
Can you use a BEC on an xmaxx 8s?
Hey dude your links have a trojan attached to them, my router blocked it but it's trying to inject wifi protocols,
Hi i have some problem with my trx4 blazer. May esc keeps on blinking green. I can control the servo but no throttle at all, what can i do? Thank you for answer
I had same problem do what I did search for that issue on TH-cam watch a few videos try everything till u get it took me a week of trial and error and cursing till I finally got it to work and it’s fine now I was ready to give up and buy a new esc
I just went with the shv500v2 servo it gets powered straight to the battery!
That is a pretty smart option that Holmes Hobby designed.
Im using a 5vdcBEC as a regulator for an arduino controlling 2 servos from 2 18650s at 7.4vdc.
My servo is 7.2v max. So 2s lithium is too much
I have my wires crossed, your just on about this for the stock esc with the trx4. I have found esc's with built in 6,7.4v power. So this video is just for the stock esc yes?. If I am building the kit I could add a more powerful esc (like the hobbywing ,mamba) and completely do away with an external?. Sorry 20 questions
Yes, under 200 oz-in servos, stock ESC is ok.
200-400 oz/in servos, need up to 3amp BEC
over 400 oz/in servos, 3- 10 amp BECs are best.
An aftermarket ESC like a Hobbywing or Mamba has a 3amp BEC so those work well.
If a BEC does not have enough power for a servo, the system is fine, and the servo just doesn't operate in its maximum power capacity.
FYI per Traxxas specs the trx-4 Bec is 6 volts and 1 amp
Do i need bec for HW1080 ?
Is punch 9 dangerous or harmful to components?
Could you not just use an emulator on your Mac to run the software?
Can the traxxas stock regular servo and micro servos handle 7.4v?
Stock is 6v but can go to 7.4? Did you ever get an answer?
Ok, this is confusing. So I have the trx sport and I have a v plow on it which has 2 20kg Amazon servos on it. And I want to swap the 2075x for a 20kg servo. I have the stock esc. I don’t know if I need a bec. Can you help? I’m basically powering 3 20kg servos. How should I hook up a bec?
It is not required. Your system will work but when the three servos are working and drawing power, they will stall and act like weaker servos.
To get full output out of all your servos, you want to get that 10 amp BEC from Castle Hobbies. And run it at 7.4 volts. The stock traxxas bec is 1 amp.
RC Review ok, thank you for responding so fast. And how would you wire it in? I’m thinking of plugging the power end into the red cable that comes off the esc. Where do the rest go?
What is a good bec for nimh battery
They're all good since NIMH has ample power for a servo. The Castle $20 BEC will work well.
Man…I just want one of those red 25kg off Amazon and now I’m more confused if I can w/o frying my esc than I was before, any suggestions?
Your stock ESC is absolutely fine with the 25kg.
@@RCReviewChannel oh man thanks for the reply!!! Loving my new TRX-4 Defender
My receiver has built in bec do i still need it
İ also use A diy esc i made from A 9g servo circuit
Can you answer this question about my setup. My ESC is a spektrum 160Amp and has a default BEC set at 6.0v and can be programmed at 8.4v My servo is a Protek 370tbl.
Does the 6v from the esc's bec get shared by my receiver? If so my servo would be getting less than 6v?
Can a hobbywing 1080 bec handle a traxxas 400 ounce servo by itself?
Yes, it will be fine since the 400 oz is brushless and quite efficient with power.
At the extreme limits, it will get hung up but will not brown out. Ideally you want a 5-10amp external BEC. but try it out first and see if you see any limitation with the 3amp BEC of the 1080
@@RCReviewChannel Thanks Francis. I will run it w/o a BEC and set hobbywing 1080 to 6v just to be safe. The traxxas servo already has 400oz so it's good as it. Only extra accessory I have is the traxxas light kit.
Why do they call them battery eliminate circuit... It doesn't really eliminate the battery, it eliminates the esc. They should be called EEC. Esc eliminater circuit.
It replaces the ESC's built-in BEC but doesn't eliminate the ESC. You are essentially upgrading your BEC when you use an external BEC. Back in the day, you would need a seperate battery pack to power your electronics. just about all ESCs now have a BEC built-in, but are usually limited in their voltage.
Because it eliminates the need for an external battery, which is what we had to do in the good ol' days.
is a bec a voltage regulator
Yes, that’s exactly what it is.
In the world of nitro the most use 1,5V x 4 = 6V.
What model ESC's have adjustable BEC's, and why can't I find info on how to adjust it? I'm pretty sure my ESC is not adjustable. I have the stock ESC that comes in the 2019 V4 Kraton 6s (which is the BLX185). I've learned, that since I have an upgraded servo, i can send more power to it with the right ESC, or by purchasing and installing a BEC. My steering servo can handle 7.4v... and would like to take advantage of it, but the stock ESC only outputs 6v.
Ideally I would just adjust the internal BEC in my ESC and away we go... but, I can find no where on how to do this... which leads me to think that my ESC just doesn't have an Adjustable internal BEC. Does anyone know which ESC's out there have adjustable internal BEC's?
Im not oppose to buying a better ESC that has this adjustable BEC, but surprisingly I've yet find info how how exactly you adjust this, even if you have one.
I looked up the specs on the Max6 and it says it can output both 6v and 7.4v... but how do you adjust it. Any help would be appreciated.
Heck... would be nice if the Stock ESC that came with the Kraton (BLX185) had a way to adjust up to 7.4... doubtful though.
Just buy a teenie DC-DC regulator for $2 and you can use it to dial down your battery voltage to whatever voltage that suits your servo.
Beats spending $20 on that thing you're holding, but does exactly the same thing.
Do you have links?
Buying the dialed solution for $20 with the correct software and connectors and mounting/waterproofing is not bad either.
Why not just isolate the BEC and use dedicated battery?
No advantage to that as the existing lipo battery for the motor is an incredible power source available with any mah level.
A dedicated battery needs its own spot and has to be monitored and charged separately.
Good videos, you should act a little more excited. This one made me feel depressed. Lol
Old video. I’m wayyyy more pumped now :)
I disagree while many are good stick with proven . NSDRC makes amazing servos fast strong and dam near unbreakable ive had tremendous experience.. But Reefs is about same but they dont make the nano micro winch and boy that little winch picks up 550 grams up 13 feet of braided fishing line no problem again and again .
Good brand. This video is about BECs though and what's powering the servos.
IBM PC?... Windows OS is what I think your trying to say. Just dual boot.
Can i used bec 5amp for servo 25 kg?
absolutely. You can use a BEC up to 10amp since any amps not needed are just on standby and available when needed
@@RCReviewChannel sory just make sure . in indo just sale ubec 3 Amp ang turnigy 5amp. My kit used esc esrun sc8 motor turnigy 13.5 T brushles and servo powerhd hv 25 kg. Another used esc hobby wing 1080 motor brused 55 t dual servo power hd 20 kg. . wich one must buying 3amp or 5 amp?? Sory
@@enrit3372 Never hurts to get the bigger one.
Damn IBM laptop...
Time capsule device for some
RCReview lol
@@RCReviewChannel Wow, the sad subtle elitism continues even into which OS were using? Check yourself and your arrogance. The only thing chuckle worthy here is your blindness to your own raging ego.
You laugh. This kind of business practice has never been supported or tolerated in U.S. not cool. I just had a esc just stop working outside 30 day warranty period. Software error. So I nay $200 for 30 day use. That's just one part. I'm an adult . What about teens ? Is this a hobby targeting specific group ? Or large group of customers to make more money. ?
There was BEC, now theres RHC
Receded Hairline Chinese
Fifty bucks is not unfortunate when you don’t want a pc in your life anymore. I’m 65, retired and I have no reason to use a pc. An iPad maybe. But the Castle Link app works beautifully with my Holmes Hobbies Torquemaster BR Mini XL in my 10+ pound first gen SCX10 Trail Honcho with 3 servos (2 steering & 1 shifter). But then it’s powered by my Reedy Zappers 8200 mah 115C silicone graphene LiPo HV drag pack. That might be the reason and not the bec which is the badass waterproof one with an aluminum case. Still prehistoric with the pc crap. And people have been complaining about the Axial SCX6’s weak servo. Get the esc programmer and bump up the voltage. I haven’t done it yet but I accept the servo’s power. And I actually accept the foams. Most of you haven’t given them a chance. And I will not remove my spare tire. I feel it’ll upset the balance. And one video shows the Trail Honcho without the spare and Proline tires and foams and it was struggling on the rocks. Mine doesn’t. I’ll leave it alone for now. Wear out the tires first…
Do I need a bec or will it hurt anything on the truck without it
It's not required but when you try to improve your steering with a more powerful servo, the servo needs a power source more than the ESC can provide. In this case, a BEC will feed the servo the power it needs.
On some vehicles, if the servo is not getting enough power for a prolonged period, the whole ESC will shut down to protect itself. It can be turned back on.