What is a BEC and why do you need it?
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- Опубликовано: 27 июл 2024
- So you're moving up in the world of radio control and you've determined that you need a more powerful servo for your radio control vehicle. Dropping a new servo into your rig will certainly improve performance however you may not be getting optimum performance from that servo. You may need a BEC. So what is a BEC? Why do you need it? What we can tell you here is you are in the right spot. In this video John Holmes goes over everything you need to know about a BEC from what it stands for, to what it does and even serveral methods on how to wire it.
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Thank you John, both for providing the information and a product that basically negates the need for it lol. I love your servos because they help simplify and tidy up the wiring, on top of being super strong.
Man you are a God send to people getting into the hobby. Thank you
Thanks, glad it helped!
Great video - thanks! I’m new and just installing my first BEC to handle a Reef’s Triple 5.
I get what it is & what it's used for. I'd just like to see a close up shot of the different wiring configurations. 👍😁
Me to
Orion This was 2 years ago. I’m not even sure if he did a different video
Orion I had to watch it a few times to remember what a bec does lol. I never ended up using one. But Reefs makes some nice servos & some of them have crazy power. What else is done to your truck?? I’m just thinking with some of the parts being plastic you don’t want a really high torque servo. I’d try & stay in the middle on their servos. Something with decent speed & torque & yes I’d run a BEC because it’ll let you get the full potential out of the servo instead of just plugging it into the receiver box. Your receiver only runs on like 5.5 v /6v so if you run the servo @8.4 v right off the battery it’ll be faster & stronger.
Orion yeah definitely look into shit for sure. I’m so hesitant to buy Traxxas electronics. The specs on their servos aren’t that good for that kinda money & then you gotta worry about it shitting the bed. Yeah they’re warranty is great but then your without a truck.
I think for me if I didn’t see all the videos & hear about all their electronics having problems in almost every vehicle Traxxas has & me have 2 2075 servos that are 12 years old & still work fine & my 4tec is 2 months old & the servo in that died. I got my TRX4 too with all original servos but the truck is 2 years old & hasn’t even had 2 packs ran through it. Lol
This one video cleared up all my confusion. Thank you
Thanks I did not understand the idea behind a BEC and when it's needed....great por👍
Thanks, answered my thoughts exactly
Nice content for newbies, thx. Your channel is underrated, a lot of cool stuff...
Many thanks! Going to film a series this week that covers all the basics in an easy to follow format.
This is the exact info I needed. Thank you!!!
Good explanation, John! I'm still just trying to get going, in my return to the Hobby, on a Disabled Veteran's very meager "pay". I still only run 2S, and haven't experienced any brown outs on my Wraith's ESC (HOLMES BTW!!). Of course that doesn't mean that I never will... I'm running a 21g Servo (whatever the heck THAT means). Not sure of the in.lb. conversion.
I KNOW that when I can finally afford a BEC, it won't be without your Bypass Adapter! Thank you for that.
Carmine 💥 ⛽
Rad.....such a good video and explanation. Thanks John!
gracias por el video John
Thank you I will watch this video a few times but thank you this is an awesome video
Another great video! Thank you!
This is what I was looking for. I'm setting up an MKS servo in an Arrma Kraton with the stock ESC. Going to bypass the ESC using the Castle waterproof BEC so the servo doesn't burn up the stock speed control. Gonna use a bypass adapter
Great video bud. I love bypass adapters!
Why did people thumb this down? Thank you man so helpful
thank you, cool vid, concise and informative
glad you liked it!
Love your videos and instructions it has helped me understand big time.. Thank you much👋👋👋👋👋🎉🎉🎉🎉🎉🎈🎈🎈🎈🎈✌✌✌✌
Breathe, John! lol. Another great vid, thanks. Bypass adapters FTW!
Or use a small JST plug for the BEC. Still unplug able for other rigs.
Thanks! very helpful!
Love your videos and products. Most people can't understand your brilliance. Keep it up.
Great vid. Really appreciate you breaking down the process and how it all works. That bypass plug is brilliant!🔥🔥🔥
Couple of questions for you-
1- If you have HV (8.4v) servo pushing over 500in/oz. How do decide on what amps bec to get? I see 3 amp, 5 amp, 10 and 20 amps...
2- I also see that some are labeled for planes and heli. Can those be wired on crawlers or surfaces vehicles without causing damage?
Hope you help and thanks for this vid. 🙌🏽
I know this was 3yrs ago but I was wondering the same thing today.
Did anyone ever clarify this for you?
Thank you!
Thanks so much for the information. Can you show us how to program it with your ecs . I'm not sure how to do that. Thanks again .
Another great video. 🇳🇱👍😉
I love bypass adapters almost as much as your Puller Pro 2200 😆😆😆🤘🤘🤘🤘🤘🤘🤘🤘🤘🤘
Great vid , Solid info for sure John👌👌👌😎😎😎😎😎😎
P.s The puller pro 2200 is Gods gift to brushless crawlers👌 . I am being naughty and running 6s and using the castle MX esc and external bec🤘🤘🤘👌👌👌😎😎😎😎 ,
I dropped the throttle curve off to counter the over 50,000rpm.
I'm pulling 2 hours run time on 850mah 6s 75c with sensational temps. ( needless to say I am running baby mode settings on the esc and I still have more power than ever needed 😆😆😆)
Its a Big weight reduction running baby sized batterys 😎.
I've never been as impressed with a brushless motor as I have been with the puller pro ..😀😀😀😀😀🤘🤘🤘🤘🤘🤘😎😎😎
(For anyone else reading this . Puller pro 2200 is recommended at 3s and has a 50,000rpm max 🤘👊)
Rc Anonymous where can you get the bypass adapter from?
@@toolstechandtoys5910 i bought mine on ebay but there's plenty of places that sell them. Just google it.
Excellent.
thank you
Good info great explanation, got a ? Can I run your 12v servo on a 11.4v liposuction ,or should I stay with 11.1v lipo?
John I have been looking for a different servo for my axial jeep Rubicon unlimited and have noticed that some servos have two voltages and also have two torque ratings for the different voltages.
Receiver batteries...I don't miss those one bit!
I also prefer ESCs with strong BECs so I don't have to mess with an external BEC. I never run servos above 6V though.
yeah, I don't miss them at all. Great way to watch a plane go down, forget to change out the RX battery every few runs.
Another great video John I copied your setting for the castle link just wanted to thank you my truck does so much better so thanks mate
Just subscribed 👍😄.... good video I have to see it a couple of times 😆.....english is not my comment language ☺️
Is there a cut off line to go by when your going to need one by how much torque a servo is putting out? Be it 4.8 or 6.0 volts.
I use my spektrum receivers as my esc in a few on my rc constructions conversions.. So with that if I wanted to draw more power too the modified 360 servos as my main gear drives..how do I go about installing a BEC? Do I just by pass the receiver and connect bec straight into a battery then into servos? hook it up same way as shown just no need to cut a red wire too a esc if I dont have one correct?
very good thanks I'll buy your bypass cables
So. Do you have a link for the bypass wire
Could I use a bec on my truck to power other things like a sound a smoke system
Just bought a trx4 and thought about a servo upgrade, if in theory I was to use the traxxas 400 servo, would I need a bec with my stock electronics?
What's the scoop on the glitch Buster's that are just a capacitor that connects to channel 3 and has no power feeding into it other then what it gets through the receiver? Can this cause any harm to esc and should I keep it on my yeti xl.? Thanks in advance for your assistance....
wow such a nice video brother go ahead make more videos electronic types brother I have a question I got a new rc 800 B412 helicopter. and they give me one motor and castle creation 20A BEC pro and reciver and Bavarian DEMON 3X FLYBARLESS system so how I connect these kindly tell me I will be appreciate. thank you
Can I use a Castle Creations series wire harness to connect my battery to esc and then to bec?
what happens if you have multiple servos? like shifting servo that requires 6.0 but steering can go up to 8v i cant figure out how to separate with a BEC and a esc+bec. i would love to see the bypass adapter close up if you can.
i have a turque master it black said 40 t on it can you tell the deffents then the other number s thank tony
Great video! I always enjoy them. I have a question regarding the waterproof CC BEC 2.0 with dual leads. The diagram shows both being plugged into the Rx for "best results". I thought the lead without the signal wire was for powering any accessory, such as light, etc.. What are your thoughts? Thank you!
There are many ways to do the same thing. Using an extra power lead to power your lights would be just fine.
Hi from The Sangster Family
Nice
So if I just want more power to my steering servo on my TRX4 but want to leave the voltage at stock on my 3 mini shift servos then I can use the bypass adapter with an external BEC? Just making sure I understand it correctly. I have a Reefs RAW500 steering servo and would like to take advantage of more power without frying my stock mini shift servos.
i use a hobbywing quicrun 1080 esc and the bec (inside the esc) voltage can be changed between 6 and 7.4 volts usingbthe program card. It is set to 6V in default and does changing the bec voltage to 7.4V increses the overall power of the rig ? i use a 7.4V lipo
I'm using a castle 20a bec wp and trying to use a dual holmes hobbies receiver bypass so I wont take a chance on burning up another spectrum sr515 receiver im also wanting to hook up a light controller i have that plugs into the receiver and powerd by the balance plug im trying to run everything at 7.4 using the new hobbywing quickrun fusion 1800kv 2 in 1 any feedback will greatly be appreciated thanks
So if I understand this correctly I don't need a BEC on my TRX4 with an SHV500v3 because I'll be pulling the power direct from my battery?
External BEC to Bind/Batt reciever slot ;)
What would possibly cause my Spektrum Rugged radio to keep loosing reverse. I've programmed my servo winch to aux 2 location F 3 pos momentary and I keep loosing just the reverse portion of the radio. I've also added a castle BEC to power the servo only, using one of your modified Y harness and still have the problem. The weird part, this only seems to happen using the E and F locations....on both of my radios. If I use D location It appears to be OK. I've reached out to horizon and still awaiting a call back...3days now
Can I remove the red wire from the castle BEC instead of the ESC?
How do i know if my servo can be powerd directly or does this work on all digital servos
Please help me with this John. I have your bypass adapter and a CC BEC 2.0 WP which has 3 sets of wires. 1 gets soldered to power (battery) and other 2 goes into reciever. With your adapter, do I plug both ends into it? 1 end into BEC port and other end into aux port of bypass adapter? Thanks in advance
Hello my friend, I have a motor sport 550 10T, and the esc 80A Quickrun 1080, do I need an additional BEC for this?
Do I need 2 BEC’s for a dual servo set up?
John I want to see a bec subject on having to setup 2 hv servos for 4ws like I want to do for my wraith please I could use some help
They make BEC' s with more than one output of power.
Is it normal for cc bec 2.0 to get hot?
Damn. I can’t get this to work with the bypass adapter auxiliary. I have an AR-3 axial receiver. Which channel do I plug the adapter into? Will a 5000 mha nickel battery work. Or do I need a lipo? Help please.
does a bec need a on/off switch?
John do you recomend a BEC having a Mamba X with a Savox 1230 500 onz/inch on 6V max...
You will probably be fine. The X has stouter than average internal BEC and a hefty case to dissipate heat.
Can someone help me, i have a question. Im building a traxxas slash from the ground up, I purchased a Hobbywing EZrun max10 SCT 120a 2s-4s ESC, I want to run the system in 4s, question i have is related to the Steering Servo, Do I run a normal 7.4v Servo or a 14v Servo that connects directly to the battery? this part is confusing me
I'm struggling to understand why you cannot have your 2S LiPo directly connected to ESC and receiver without a BEC, what's the issue if my receiver and ESC both work with 7.4V Lipo ?
Great video can you get closer to see the connections?
Yes we can
@@HolmesHobbies thank you! A friend and i are trying to figure this out
I thought the servo got wired to the external BEC now for power?
Is there ane drawback of direct plugging 2S lipo to receiver if everything is HV?
not really!
Hello Friend, thanks for the explanation. You said you programm BEC on 7.4V. is it right all the electric component (receiver, Servo etc) must have a minimum voltage of 7.4 or hoger? All my component beside the receiver (6.5v) have it and i was wondering if i can programm the BEC on 7.4v? I have a hobbywing exrun XR8 sct. Thanks a lot.
7.4 is safe for almost all modern radios and servos.
Hello Sir can you please make a video how to wired it all and show it in full detail..i don't really understand how to do that sir.. Please 🙏😅
great video, only question is who makes the by-pass adaptor? or is it custom?
Craig Thompson Holmes Hobbies of course. Available direct or at the better crawling suppliers
Mike McElligott i geuss i better step up my game as i am a holmes hobbies supplier
Now how do I do 2 direct servos I 4ws 🧐
I have Capra with dig. I’m operating a futaba s9177sv servo and a reefs 99micro for dog. Both can ran off 7.4volts . I also have a BEC I am installing with a mamba x esc. With a T4pm futaba controller. What do you recommend me setting my main voltage too.
7.4 is just fine
I’m sorry sir I am also running a homes hobbies 540s 3300 KV with the over drive in the portals. I have truly learned a lot watching you and Harley and SBG. Thank you for the info. May I send pictures of my ride when done also may send a couple of buildings pictures as well if ok with you
I heard you can use these to power lights on your crawler (headlights, light barn ect.) Is this true?
As long as the lights have built in current resistors or a current controlled driver
I could use some kind of drawing or wiring diagram, I don't wanna wire something up incorrectly.
do you know if bec's can be powered with pwm current? an odd question i know, but i need to know for my rc project.
I wouldn't do it. But if you have enough capacitance on the input it would work. Needs to be smoothed. 250uf low esr minimum
@@HolmesHobbies thank you
How do you wire four wheel steer with BEC?
Does he reply to These post??
Can you recommend a product like this that can power working current of 7-17v it’s a 12.6v led but you said this can do 7.5v
There are cccv drivers on ebay that you can set for controlled amps and controlled volts. Unless you have current limiting resistors on the LED you need controlled current
@@HolmesHobbies should I get the Cc/cv driver that’s adjustable? Since there’s one that’s only has one adjustment & one with 3 adjustments. Since the one with one only does 3a & idk how much that light needs so it would prob be better to get the adjustable one? Also there’s another product I got my eye on which is the iflight 2-8s voltage regulator BEC says it can do 12v 3a & input is 5-36v this sounds like the cc/cv driver don’t it?
3 adjustments, so you can control current. I can't guess at your needs, this is when you would need a multimeter to figure out more
@@HolmesHobbies I ordered both units to test them. if 3a works good and don’t over heat I’ll stick with the 1 switch just to keep things easy & less things that can go wrong .. but if 3a to the flashlight is too much I’ll use the 3 adjustment one to help that!
Question: why don't your rock crawling ESCs come with something like a 10A internal BEC? It'd simply builds *so* much. Ideally with a 6V secondary.
cost is a large factor. Of course I also have servos that don't need a bec to begin with :)
Makes a lot of sense, thanks. Please get good EU shops so we can vote with out money, so nice to see people doing things right.
For now, we have asiatees and rcmart that carry our goods in Asia and offer low cost import into the EU.
They don't integrate with EU customs so you can get hit with really nasty import taxes and carrier fees. Hope you find someone in the EU soon!
The import taxes from china are lower than the US (unfortunately), even if they don't export properly.
I thankfully found a name brand servo that has nearly 450oz of torque at 6.0 volts. It is NOT however for those who drive their RC truck as would a submarine commander.
Don't use such bypass adapters, it may cause issues. Get a simple Y-cable, with 2 female and 1 male connector. On the male connector that plugs in the reciever, remove the positive AND negative wires but leave the signal wire intact. Having the negative wire intact ( like on the bypass adapter shown in this video) may cause unwanted actions. On one of my trucks it caused the servo to turn full left when giving full throttle. This was caused by having the negative and signal wire plugged to the reciever.
This wont happen to the majority of people and for me it only happened when I swapped the reciever for a newer one. But better safe than sorry.
First time I've heard of this problem out of tens of thousands of bypass adapters. I have seen hundreds of floating ground issues that bypass adapters solved however. I would like to know more about the wiring, battery, and radio situation
It is quite important to tie ground together on the RX, battery, BEC, and esc so that the signal is referenced properly and there is not a chance of ground loop.
@@HolmesHobbies I was also surprised when this problem occured. The truck it happened on functioned perfect for over 15 years untill I swapped the reciever. As for the specs and wiring: A Hitec servo, I believe it's the HS-7955TG. connected to a CC BEC as shown in your video, a Tekin FXR ESC and a 3s lipo. Radio was a old LRP system when it worked fine, replaced with a Absima CR6P radio and Absima R6FS reciever. This is a rebranded Flysky system.
The BEC is wired to the servo with a Y-cable, on which the + wire going in to the reciever was removed. the ESC feeds the reciever with power. Exactly like you show in the video. When I swapped to the new radio system, problem started. If I applied full throttle, the servo would fully turn to one side and the car wouldn't move. After some searching on the internet I came across some posts that suggested removing the ground wire as well. and voila, the problem was fixed.
Wish you could make a video on how to wire a bec on a nitro car. Is it possible?
most people use 2s or 3s pack for it?
HolmesHobbies yes, planning on a 3s pack, but how is it wired since there is no esc?
just straight into the battery
If I plug straight into the battery, 3s - 12+volts, the servo will fry as they are only 7.4. That's where the confusion is - On how to wire the bec to avoid the servo from overloading. On a nitro there is no esc.
The battery goes into the BEC. The BEC goes into the radio and powers the RX and servo.
I need a holms hobby 540can brushless and esc for my scx10 3 I have a trx 4 kit complete built and a set of 200 dollor traxx for the trx4 kit it also has locker wheels will send picks on request I just want to drive my scx10 3 but ijust got out of hospital for having my right foot shoot by the45 will you please help me I dont no whom else to ask
Good video ,, but Would like to have the camera zoomed in your hands.
Dude I fucking love you your shit is legit thank you so much😮
Diagram would cool for us dummys on three ways
Think of it as a voltage regulator. Basically
ohhh
Old post, I know. But,I think you should leave out the "ask a question in the comments and I'll get to it," malarkey. Pretty tough to answer everyone, so leave out the expectation. Lots of unanswered questions here, probably the same number of disappointed posters.
is that a real gun on the wall over there..?
probably airsoft. The real guns stay on the hip.
Just cut the red wire on the esc. Done
I never mess with the ESC / BEC Red wire ?? I just connect a 3" servo lead with the Red Wire disconnected to the original ESC lead and keep the originality of the ESC unit in tack ... This is for 2 reasons, first being Re-Sale value and secondly, disconnecting the Red Wire on some BEC's may effect the programmability of the ESC itself and/or the BEC itself. Not Good ! A 3" servo lead is $ 0.47 ...Lol
My head hurts now
doesn't understand anything at all. There are no images, or any tests
this is showing the idea but no actual output done to shown that actually works? hmmm .. booom!
Omg that is extremely complicated lol 😂
Sheesh, you keep talking power to/from the radio? The radio powers nothing from there. It's RECEIVER!
Nice explanation but I couldn't see what you were doing.... I don't want to see your face, I want to se what you do.... sorry but 👎
sorry, I will do better
@HolmesHobbies ... Thanks for reply... 👍👌