All about BEC's with Holmes Hobbies **Top Tips For BEC** How to select the right BEC and more!!

Lets take a dive into the world of BEC's
What are they?
Who are they?
Do you even need a BEC?
What does BEC stand for?
Sit back and relax, while John Robert tells you all about whats inside a BEC and how the work.
Selecting the correct BEC is very important, and JR is here to help!
FOLLOW HOLMES HOBBIES:
KZbin: / holmeshobbies
Website: HolmesHobbies.com/
2nd Channel: / johnrobholmes
#HolmesHobbies #rccars #rchobby #rcbattery #rccrawler #chasis #RCTruck #fixit #johnrobert #tgh #BEC #castle

[@kmancrawln9656]

Thank you for taking the time to make these videos, it's nice to actually understand what makes these rc's work!

[@jebus5656]

Yes please do a deep dive into the components of the bec. I'm always down for a more in depth look into electronics.

[@nj2033]

I love it when something is explained properly! I did always wonder why it was called a battery eliminating circuit whilst it still had a battery. Thank you

[@rascalracing4428]

Thanks Again John for an other informative video!!! You Rock!!!

[@IN10THRC]

As a guy who first got into RC back in the mid 1980's- know EXACTLY what (and why) it is. BUT- You might tell me something I don't know- so I'm gonna keep watching! Great explanation! The older folks will remember the joy of getting rid of the four AA batteries when we got a newfangled radio set that had an integral BEC (because MECHANICAL speed control (there's a throwback!) followed by the utter horror of our prized Hornet or whatever buggering off into the sunset with NO controllability because we were foolish enough to let that 7.2v NiCad get too low to run the radio and no longer had those annoying AA batteries... LOL In MY case, it was a Marui Golden Eagle CJ-7 off across the way and into a pond. That was, uhh- fun. LOL

[@pjtruslow]

So far I’m a huge fan of the castle BEC 2.0 Used to like the BEC pro, but I’ve had a few of them blow up on 12S.

[@TheAmericanUhate]

Your videos is really growing on me more all the time. I enjoy your way of explaining everything. Things has changed a lot since back in my day lol. I took a 15 year hiatus from the hobby, and still trying to catch up with all the tech side of things. Thanks for making these videos!

[@aftermathmotomxrc]

WELCOME BACK!!

[@Johnny_Guitar]

You learn REAL quick the importance of signal and power supplied to the ESC, servos, gyro/receiver and slave RX's when you get into serious 3D heli's where you DO NOT want any spiking whatsoever, and with 3D heli flying, it's not like our rock crawlers and crashing is very close to total catastrophe many a times...just sayin'. Thanks John.

[@Roadnuts86]

Back in my day the bec technology was developed within the beginning of the esc. When I ran my first few Tamiya kits they used a mechanical speed control which had to run two servos, and an rx battery to power it all. When the esc became available they introduced the bec because the rx battery was no longer needed. The weight savings and lack of complexity, not to mention increased run times, was the wave of the future! Now, I run CC becs in my crawlers to give the steering servo solid power. I found the term bec confusing at first given my history in the hobby, but I certainly see it’s benefit!

[@MegaAaron42]

I remember the old mech speed controls just a series of resistors and contacts driving by a servo. Fun stuff!

[@ragsixracing]

The first becs I remember were in the rx. I remember I had to buy a new radio when I got my futaba 112b esc, because running a bec in the rx and also in the esc would fry the radio rx

[@Jesse_Dank]

Love the information and learning I get from your videos and knowledge john. Keep it up, would love a deep dive bec video!! And thank you for the super fast shipping every time i order from the website!!

[@WestyCoastHermit]

I love learning! Thank you!

[@hemitj]

Thank you for these great informative videos! Awesome! Keep up the great work!

[@aftermathmotomxrc]

Ditto

[@galkawarrior]

Thanks for sharing your knowledge and experience. Just a little over 10 years ago, I learned how to fly RC planes on a foamy electric Cessna, goal was to get into ducted fan planes. Anyway, like most, I hope, I use a BEC in my planes in case the ESC fails so I can still somehow control the plane and possibly land it properly or have a less impact crash.

[@crazylarryjr]

As a fellow "When I was your age" person, I also remember when you had to use a mini pack, to power your receiver (just like the Nitro's). When BEC's started appearing in ESC's it was a revolution unlike anything that happened till brushless motors took over the Industry. It was that huge in my opinion

[@aftermathmotomxrc]

Time flies!!

[@stephenmanley4097]

I remember the separate battery packs for RC cars back in the 80's. I remember when the ESC started coming out my first one was a futaba. Good video 👍

[@jdsrcs8061]

Man this takes me way back. When I got my FOX it required a BEC do to the chassis tub had a lid. And of course we didn't buy it. So I didn't get to drive it for a few days till we got back to the hobby shop.

[@aftermathmotomxrc]

Thanks for the information. #cheers

[@yodecaf]

I recently figured out what it was when my HV servo was draining my shorty pack and I didn't understand why. Then I opened up this can of worms. Thanks for doing this series. I would love for you to talk about shock tuning and how to determine angle, placement, spring and oil weight specifically for crawling.

[@bongofury3176]

subscribed sir. i owe it to you after watching and learning from many of your videos...and i have 40 years RC experience ! Happy crawling to you from Derbyshire's Peak District (crawling nirvana)

[@chanceRc]

Very helpful. I just put a bec in and it worked awesome. Got done installing and testing then I unplugged one battery in the wrong way cuz I as running a two 3s batteries and created a short. Bey bey reciver and stepper wire. Well you live and you learn.

[@HolmesHobbies]

whoops

[@chanceRc]

Do you think it it fried the bec as well when it shorted?

[@ryano8613]

Love it!

[@wademoulton5109]

Thank you amazing Information

[@RC4X4]

Very interesting video. I fly foamy planes to Giant Scale Gas and electric planes. I'm gonna have to look at the powering the servos direct and just running a signal wire. Makes sense. I'm sure some are doing it now but I don't know anyone that is.

[@BUILTLIGHTWOUNDTIGHT]

AWESOMENESS!!! 😎

[@chrismcraker7088]

in depth BEC dive 👍

[@Ittybittythetwofacedkitty]

I grew up with the 27 mhz radios. Boy things have come a long way

[@telfow1]

battery eliminating circuit. it puts a capacitor in line with the power so there is some power on demand when required.

[@ravenshield7823]

Thank you for the explanation.

[@HolmesHobbies]

Glad it was helpful!

[@RTmadnesstoo]

Yeah, now that I have a SHV servo on my Crawler I use the BEC to power my RaspberryPi using a spare LiPo. Worked out Great!

[@jerryvolpini7987]

Hard wired servos are certainly the way to go but the BEC is still widely used, even in the crawler world. So, I don't think the BEC is going away any time soon 👍

[@MegaAaron42]

Back in the day my rc's had a 4 cell AAA batt pack for the radio and servos then the main batt for the motor.

[@MAIDENCOMMONRAIL]

I have one in my wraith since 10+ years and i just bought 3 of them recently for other rigs

[@jameskauffman8405]

Yes, let's do circuit design breakdown. Knowledge is king.

[@dezfan]

Battery elimination circuit. We used to use a 4 cell AA pack to power receiver and servo. Seems like it was 2008ish when I remember seeing the first BECs used?

[@respirologyrc]

I use two BEC’s on my 1/5th scale. I run a 4 cell lipo pack… 14.8v One U-bec is used to reduce this power down so I dont fry my rx. The second u-bec is used to power my throttle servo at 8.4v Then my steering servo, which is rated for 4s is directly pulled in to the battery. Three different components, with 3 different power needs. Gets expensive when being competitive

[@HolmesHobbies]

can get expensive, but worth it! imo

[@tomandrews5392]

John if your like me well if i am like you you will have drew full of BEC these days ..seems like every time i upgrade my older rigs electronics i pull one out and toss in with the others...LOL SHV servo awsome...

[@ericgould9555]

Something that was a big help with the bec is when you started making the bypass wires.

[@knightdeluxegaming]

Please elaborate more about the world of esc 💙💙💙

[@BigRaines1]

I run a direct power servo but I am using a castle micro x2 with an external bec. My question is I still have to use the bec correct? To power my receiver? Since there is no internal bec in that esc.

[@hotboyracing]

I bought a rx4 esc for my vs410 ultra what Holmes hobby motor would you pair with it? I was going to probably get a sensorsed brushless system

[@whatalias]

I am running a BEC in my Capra for a lp Savox dig servo.

[@timvanasen6711]

Before you answer John I paused video lol, BEC battery eliminating circuitry, you'll explain the purpose thank's for sharing 😉👍

[@never-stock-rc2968]

Question for you I wanted to buy your punchy puller 2100kv motor when will they be in stockers?? Thanks

[@michaelnewenham8092]

Video pops up as I’m installing one in my SCX10III. All servos now running off of 8.4v

[@coreyburlock3594]

I am not a rock crawler guy, but I love these informative videos. I did not know there is a "direct power" servo. Which leads me to my question. I am a 1s pan car guy. Servos do not like running on 3.7v. Therefore we have to run 1s specific esc with BEC boosters. This limits the esc's your able to run, there are only a handful of companies making them with a starting price point of $120. Also that esc is not capable of running anything but 1s. So I cant run them in my 1/10 off road racers. I would like to just run a normal 2-3s esc. Will a direct power servo operate on a 1s lipo effectively??

[@HolmesHobbies]

Most servos will not turn on so low. Not impossible to develop a 1s servo , just not a large market for racing these days.

[@ragsixracing]

I know what it stands for. Futaba used to have receivers that had the bec in them in the mid 80s👍

[@slowish2964]

Digging that little mountain bike. What model is that?

[@dougrunyan5952]

I’m building a vanquish phoenix and plan on putting both shift servos and a winch but run my steering servo direct power. I’m curious if I actually need an external BEC when using the castle mamba x esc with it being rated having a 8A BEC.

[@HolmesHobbies]

You won't need an external

[@arsonist3013]

Question about the amperage capabilities of receivers in general. Do you or anyone else know how many amps a receiver can supply? Ive never liked the added wiring associated with becs so I've always purchased escs based on how many amps they're able to deliver through the internal Bec. The other day I noticed one of my flysky receivers had a 2 amp marking but I can't find anything in the specs about amps. It would be a shame for me ESC to be capable of 6 amps whilst me receiver was only capable of 2 amps

[@HolmesHobbies]

The traces inside are normally good for about 5 amps. Above that, it's best to have a bypass harness so the amperage goes around the internal RX traces.

[@adammtber5199]

What BEC do you recommend to use with the Crawlmaster Mini ESC RTR?

[@kevinpaul6683]

I wanna see you get your hands on the ISDT ESC70 WP 1080 70A. Seems to be better than the HW1080. Would love to see your review on it once you've had it tested.

[@Radio_aCtive_rc]

Can I install the castle BEC on a hobby wing axe if my ESC already has a BEC in it already??

[@sabresswords]

What happens if youre running a bec and servos on 8.4 volts and the bec fails. Either due to something like a short or maybe over drawing current (if that's possible) ? Does that fry your reciever or servos? IE. A 3a bec and servos require more than 3 amps.

[@cobaltjones]

bottom line it for me. I;m using an Avian 120 12S setup. Do I need an external bec beyond what the esc allows?

[@eastermister1]

I wish we were friends John

[@zonegamma8197]

let do deep dives and learn the technical details look cool to be working at your company

[@scottmichael7178]

I got a question one of you all will probably know. I have the hobbywing fusion and set the internal bec to 7.4v to power the hv servo i got, but the receiver i plugged it into says its rater for 4-6.5v. Shouldn't the power from the esc have burnt up the receiver ? I ran it before realizing what the voltage for the receiver is rated for, and it seemed like everything ran fine and i ran for a long time and didnt have any issues. What am i missing ? Any info is greatly appreciated !!

[@buysncharge]

There is a generous safety margin in that range. Some 6.8 volt servos can handle 8.6 volts. But they burn out faster in a bind.

[@kmancrawln9656]

Have you done a video explaining the difference between a sesosrless brushless system vs a sensored brushless system? If you have can you drop a link on this comment please, thanks man!

[@CPRC23]

Just bought one of your hv2000 servos for my scx6 and decide to get a castle 10a bec to maximize performance. Bec fried 20 minutes in to my run and killed my receiver and my hv2000 😢

[@albertharris2903]

So say your running a micro x esc paired with a 1400kv revolver, powered on 3s. Can you run a Raw 500 servo because of the micro x built in bec?

[@HolmesHobbies]

Marginal. Ask reefs if 2 amps is enough

[@johannjoesten648]

Yes sensei please teach us the ways of the BEC. Reveal the mystery housed inside of that blue shrink wrap please. Thank you so much for doing these videos I find them very interesting. Much love John.

[@toysforboysrc]

I need a BEC that can power small led 6v and also big led 8v at the same time. The Hobbywing has a 10A with adjustable volt output but it’s with a jumper….. I’m waiting for their reply as to if the jumper must be used to only choose one voltage value or if each terminal has its own voltage value so I can power small led 6v and big led 8v at the same time. Do you know anything about that BEC and can you recommend me a BEC with multiple different voltage output values that can be used at the same time? Thanks please reply.

[@HolmesHobbies]

I'm not aware of any

[@toysforboysrc]

@@HolmesHobbies …. Yea I had to return some items that weren’t going to cut it. However, I did finally come up with a solution and it involves a custom computer VGA harness that will manage everything.

[@rcaffliction3641]

DEEP DIVE INTO COMPONETS PLEASE.

[@wesmadebuilds681]

They can still be good for running LEDs

[@savagelife977]

When are crawl master mini coming back. I love the learning videos keep them coming

[@HolmesHobbies]

1 to 2 weeks. Have them now, just testing

[@savagelife977]

@@HolmesHobbies thank you 🙏🏻 and your employees for the awesome products I have had a cart full of items for a bit just waiting on a couple of ESC to be in stock. Been checking the website like everyday for what seems like a month or two. Also wanted to thank you and your employees for the warranty that you did for me. That was some great customer service not many companies would’ve even messed with it.

[@fishnrc294]

I understand the concept but still don’t get why we would even need a BEC but you stated you don’t see them anymore said it all. The world of RC is still pretty young so there’s still a lot of room for improvement. But I’d have to say some of my crawlers are just amazing.

[@stevelucchini87]

Wouldn’t I need this BEC to run one of your servo’s off of a 6S pack on my 1/8 scale truggy? Set it up for a four cell output between the battery of the servo, and just run the receiver off of the 6 V out of the ESC? Would this BEC work for the application I’m looking at with one of your servos?

[@HolmesHobbies]

Yes, running 6s you will run a bec for 14.4v if you have a direct power servo

[@stevelucchini87]

That’s what I was thinking. Thank you so much for the reply John*.

[@forrestcrabbe]

🤘🍻🤘

[@BUILTLIGHTWOUNDTIGHT]

Can't bring myself to buy any esc that's running less than 6V 3A, because I don't want to go buy a new b.e.c. on top of the new esc. One and done!

[@lawrenceshields8791]

I was told using a BEC is more reliable power for your servo than direct power. They said it was like a capacitor and never let the voltage drop. Is there any truth to that? I can't find anything on the subject. I run dorect power 4s now

[@HolmesHobbies]

It's more even power over the whole pack to use a bec. That's why I ensure my direct power servos are overkill enough that a dead pack still delivers more performance than needed

[@rc7178]

I don’t agree, John. You are right about the steering servo but on most of my rigs I have at least one shift servo (dig) and a winch. The servo winch wants (Reefs 499 servo winch) 8.4V as does the high powered dig servo(reefs 299). I have only recently begun to not bypass the receiver with the higher voltage in a bypass rig but what I’m getting at is that steering is only half the battle.

[@HolmesHobbies]

There are certainly a lot of rigs and needs these days!

[@rc7178]

@@HolmesHobbies you betcha there are. Your stuff rocks and the people on your team are great. Even Jordan

[@LightCarver]

It's so funny they are called a "BEC" still... just a DC-DC converter, whether a cheap one with just PWM to step down or a better inverter one.

[@Rockcrawler04]

I remember when we could "turn them up" to 6.4. 😂

[@ktmjay9920]

I remember. Servo packs LoL

[@donaldhenke2750]

is a bec a voltage regulator

[@buysncharge]

Yeah. Like a buck converter.

[@robertmann7948]

Let me get that servo 🤣

[@archerash6695]

You grew a beard in 5mins.. wow. Last video I watched you were clean shaven. 😂

[@HolmesHobbies]

I use a special beard oil

[@toysforboysrc]

Does anybody remember Janet’s boyfriend from the Netflix series the good place?

[@ares333x2]

BEC... Bacon, eggs, cheese! Mmmm. Or 🤔 Big electric crawler. Or was it Big Enormous Crap? 😳😝

[@eeatsvaz]

BEC= bacon egg and cheese

[@kmancrawln9656]

Thanks now I'm hungry for breakfast 🤣

[@fuse557]

I didnt understand a damn thing in this video than Battery elimination. never used a BEC in my crawlers, only thought it was necessary for high power servos.

[@Wotup72]

You lost me at BEC.

[@mrstanton81]

Dishing the truth about magic pixie 🧃. 🧙‍♂️

[@Rc-Adventurers]

My first crawler was a Frankly. Had Rustler trans, Bender custom chassis, I think Tamyia Rock Buster axles maybe 1/16 (not clod). Brake line and threaded rod links. Used Rustler wheels cut and clued with Proline MOAB tires. Traxxas 3 channel controller to run rear steer but would use Xmod crystals so we could run with more people and not have interference. Oh back it the day😁