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02-03-2017, 02:39 PM | #1 |
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Few BEC related questions.
Just about to install a BEC myself and had a few questions... Has anyone used either the Turnigy "5amp" BEC or the Hobbywing 3amp one? The Turnigy one is huge in comparison and has a capacitor and the Hobbywing doesn't. Although the Turnigy is marketed as 5amp, that's peak and it's really 3amp as well. I was wondering if the added size and the fact it has a capacitor is any indication it's going to be better in some way. Also, can i put my BEC beside my FM receiver without any issues? Should i keep the ferrite ring on it ? |
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02-03-2017, 02:41 PM | #2 |
I wanna be Dave Join Date: Feb 2013 Location: NW Indiana
Posts: 3,196
| Re: Few BEC related questions.
I would install the castle creations 10 amp BEC, thats all I use on my rigs...I like that its a 10 amp BEC...and I usually put mine in a bundle with the rx in the rx box or bundle all the wires together and have had no issues with interference.
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02-03-2017, 02:49 PM | #3 |
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Re: Few BEC related questions.
Good to know there's no interference. Does the castle one use a ferrite ring? Castle BEC here in the UK is about the same as $35 or i'd go for one but it's just a trail rig and nothing serious. Hobbywing one is about same as $6 and Turnigy one, same as $9 |
02-03-2017, 03:29 PM | #4 |
I wanna be Dave Join Date: Feb 2013 Location: NW Indiana
Posts: 3,196
| Re: Few BEC related questions.
no ring, what servo are you planning on running?
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02-03-2017, 03:42 PM | #5 | |
I wanna be Dave Join Date: Sep 2006 Location: Anchorage, Alaska
Posts: 3,099
| Re: Few BEC related questions. Quote:
Trail rig or other... reliability/capability/adjustability are factors to consider. CCBEC 10A PEAK 25V MAX INPUT SBEC https://www.hobbywingdirect.com/prod...ant=1013205920 https://hobbyking.com/en_us/turnigy-...v-hv-sbec.html Last edited by TacoCrawler; 02-03-2017 at 03:48 PM. | |
02-03-2017, 04:43 PM | #6 | |
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Re: Few BEC related questions. Just a Power HD @ 6v Not listed as waterproof, but they are and got it a lot cheaper off of Ebay. https://www.modelsport.co.uk/power-h...roducts/388829 Quote:
Hobbywing 3A UBEC 5V 6V Switch Mode BEC | eBay https://hobbyking.com/en_us/turnigy-...-for-lipo.html | |
02-03-2017, 07:27 PM | #7 | |
I wanna be Dave Join Date: Sep 2006 Location: Anchorage, Alaska
Posts: 3,099
| Re: Few BEC related questions. Quote:
and only spend money if they fail to deliver. Good luck with utilizing them : crawls back into his corner : | |
02-04-2017, 12:25 AM | #8 |
Rock Stacker Join Date: Jan 2017 Location: Adelaide
Posts: 90
| Re: Few BEC related questions.
Use the highest rated Bec you have, the capacitor will help with short term surge current for example if you momentarily stall the servo. Personally I'd keep it away from the rx but if that's not an option at least test it a bit before final install and be aware that if there are jitters that could be the cause Last edited by SkiSteve; 02-04-2017 at 12:31 AM. |
02-04-2017, 06:25 AM | #9 |
Quarry Creeper Join Date: May 2009 Location: Scotland, UK
Posts: 401
| Re: Few BEC related questions.
Thanks for the advise folks. Going to do exactly as suggested and dummy fit them together and if any jitters will seperate them but hoping they'll be alright. I'll go for the Turnigy "5a" BEC with the capacitor first and see how i get on. No chance of stalling the servo with my driving though. |
04-04-2017, 06:45 PM | #10 |
Newbie Join Date: Oct 2016 Location: Ellis
Posts: 4
| Re: Few BEC related questions.
I am new to the hobby, and this might be an old question, but I'm getting ready to install a new servo and I'm stuck between a few options, I have heard a lot about using a castle creations 10a external BEC. My question is how do you know if you need it and what is it's full purpose. Currently running 2s, is it necessary running on 2s on axial Wraith I'm looking at higher torque servos??? Thank you for any tips
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04-04-2017, 08:07 PM | #11 | |
Quarry Creeper Join Date: Dec 2016 Location: Cawston, British Columbia, Canada
Posts: 476
| Re: Few BEC related questions. Quote:
I've kept the ferrite ring on all of them so don't know what you could see if you removed it. | |
04-04-2017, 08:19 PM | #12 | |
Quarry Creeper Join Date: Dec 2016 Location: Cawston, British Columbia, Canada
Posts: 476
| Re: Few BEC related questions. Quote:
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04-04-2017, 08:44 PM | #13 |
I wanna be Dave Join Date: Jun 2016 Location: Austin
Posts: 6,005
| Re: Few BEC related questions.
The HeyOK Adjustable BEC here doesn't require soldering or programming: https://www.rpphobby.com/product_p/heynbradj.htm |
04-04-2017, 11:04 PM | #14 |
Rock Crawler Join Date: May 2016 Location: SoWIs
Posts: 618
| Re: Few BEC related questions. Another thing to remember is that the chips in these switch-mode power supplies are sold 100:1 for every Castle UBEC sold. Unless they use horrendously bad china-cloned parts, the designs are usually bulletproof if you don't overload them. The Turnigy 5A posted uses a 3A chip. A constant 3A will be fine with 5A spikes, but anything over 3A constant will overheat it fast. The HeyOK honestly looks like an LM2576S design, which is a 5.8A chip (3.5A min & max 7.5A) if it's a genuine ONSemi chip. At $30 I hope it is, as ebay is flooded with clones that can barely do 3A. Honestly most Hobbyking UBEC's over 5A use some fairly advanced chips. Anything used on a heli is MORE than enough for a single-servo crawler. On my 4WS crawler I just have dual 3A ubec's, one per servo. They were less than $1 each, but I did have to wire & adjust them. Here's one interesting bit of info. You can actually connect UBEC's in parallel if their output is w/in 0.1v of each other AND you put a schottky diode on the positive output of each (3A diode is rather big). If load increase more on one UBEC, the diode will naturally drop the output. This means 2x UBEC's will provide 75%+ more than one alone. An older Turnigy 5A UBEC actually paralleled dual 3A's, but I'm not sure if they bothered with the diode. The MP2307 below used in each is actually rated similar to the LM2576S mentioned above. |
04-07-2017, 12:07 PM | #15 |
Rock Crawler Join Date: Mar 2005 Location: Dude on my dirt bike in SoCal!!!
Posts: 949
| Re: Few BEC related questions.
Been running one of the hobbywing ones with my Promodler 420v4 servo with zero issues. Even pulled the ferrite core off the power leads, run the receiver and servo off of it and it sits right next to the receiver in the box on my bomber.
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04-07-2017, 02:39 PM | #16 |
Rock Crawler Join Date: Jan 2017 Location: DownUnner
Posts: 521
| Re: Few BEC related questions.
Hobbyking YEP 20A BEC - its $19AUD so about $14USD and is a German design. Naturally it's cloned but it's meant to be excellent. It can run some hardcore gear. |
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