HobbyKing Online R/C Hobby Store : TURNIGY 8-15A UBEC for Lipoly

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19/08/2010
matthias e. (100%)
Hat schon mal jemand versucht 2 dieser BEC Parallel zu schalten? Oder einen Pufferaccu parallel zu schalten? Gru Matthias

19/08/2010
Fumaaa (90%)
i need help! in the wire of output is just one, but after he make 2, i connect all 2 in reciver? ty

xcellflyer (77%)
Hello, As far as I know, only one is needed in the Batt slot of the RX.

8/08/2010
CORY LESTER (50%)
I know this has been touched on but I just want to clarify.

1. If I do not want to trust my plane to a $15 regulator can I use 2 of these running in parallel through a Bat share Device.

2. With a bat share device will it draw the batteries down evenly because the bat share will favour the regulator that has the higher voltage ( Slightly higher voltage due to inperfections in the regulators )

Lipo Setup

6/08/2010
p.chats (55%)
Hey ya guys....
So the two RX wires of this unit are for double conecting to your RX, or one to RX and other to ( for a Gas engine ) an ignition module, or a lighting system??
So if I was to connect both of them to my RX I would put one into normal Battery position and the second into an unused channel ( retracts??)
Sound right???
Thanx

4/08/2010
elder (71%)
It's been out of stock for more than 14 days now. This ETA is very wrong.

30/07/2010
Tomas (100%)
How many servos can this handle?

elder (71%)
Depends, what kind of servos are you using? 2.5g, 5g, 8g, 9g, 30g, 100g, 13021032103g ?

7/07/2010
Milan (86%)
Tento UBEC je vynikajc. Velmi siln, spolehliv, je chladn i pri velkm zatžen a je lehk. Pouze jeden mal problm: anti-zkrat nefunguje. J jsem ho splil chvilkovm zkratem. (zkrat zpusoben mou chybou).

16/06/2010
CORY LESTER (50%)
In the event of a failure does the power shut off to the receiver or allow the battery voltage pass through to the receiver

mentorpilot (47%)
If you have a failure. The Power will shut off normaly. Because the Receiver says so. This is "failsave"

NITROMETAN (50%)
If the unit becomes defective from any reason,it will NOT deliver any power to the receiver.It has nothing to do with failsave or either with the receiver.On the other side,if the voltage measuring system integrated in Ubec has a problem,(usually bad ground soldering in manufacturing process)the output voltage can rise,and if the receiver does not take more than 6V it will be destroyed.If you put this unit in a expensive plane,do 3 tests: 1)connect 1,5 ohm 30watt resistor at output and switch the voltage switch between 5 and 6 volt.It should be around 5,1 volt in 5 volt position and around 5,9 at 6 volt position.At input 3S pack.After 20 minutes the Ubec should be max 50 celsius degrees hot and hold the voltages. 2)After 20 min and with everything connected,put the Ubec on a vibrating surface,or start the engine of your Gas plane.It should hold the voltages. 3)Connect a 2S pack.It should be the same voltage at output. If the Ubec is healthy,it should support these tests,if not,bad luck! Beware!!!!The resistor at Ubec output will be very hot,please take any precautions to avoid fire or injuries during the tests.

28/05/2010
CORY LESTER (50%)
What LiPo input lead connector comes with this item ?

What LiPo battery will connect to it without any soldering ?

pilotonboard1 (91%)
Hi,

The connector to connect the Lipo-battery is a red JST Female 2 pin connector.
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9631&Product_Name=JST_Female_2_pin_connector_set_(10pcs/set). On the webpage of the Ubec, you see this connector next to the on/off-switch.
Olivier TX2TX

mentorpilot (47%)
This comes with the BEC lead connector. Im using a 2s 1350mAh lipoly for it.

Thomas (18%)
No battery connector is provided. Soldered on a deans connector to match my batteries

28/04/2010
farabiahmed (90%)
The output is 5.7v at 5V selected, Is it harmful for Gy401 and S9254 tail servo?

Joachim (19%)
Yeah u can use thatone because the Voltage will go downt if the Servo pulls power from it.

13/09/2009
red_baron (40%)
Is it possible to connect 2 in parallel??
Maybe using a diode?

Alain (32%)
did you try 2 in parallel ? thank you

red_baron (40%)
yes i tried but when i switch on both of them, one off them was burned

pilotonboard1 (91%)
Hi,

I read on a French forum that you cannot use them simply in parallel. You MUST put 1 shotky-diode on each Ubec-positive lead between Ubec and receiver. Those Ubecs doen't seem to like any "reverse"-current.
I use them on an Alpina 5001-Alpina 4001 and a 45cc-tug, everytime with 2 shotky-diode ands the setting on 6 volt.
Olivier TX2TX

NITROMETAN (50%)
In power sources for computer you usually find 2 shottky double diodes in a TO 220 package with only 200mV voltage drop and rated at least 15 Amps each.Use one double diode to connect 2 Ubecs in parallel.

12/09/2009
zIvIlIsT (42%)
Has this BEC a Reverse Function?

racer75 (-22%)
Reverse for what?

Napstr (86%)
This is a bec not a speed controller. this device only provides power to the reciever and servos so does not have any motor controls and as such does not require reverse. You will need a seperate electronic speed controller (ESC) to control a motor and that may have a reverse depending on the model. This device is more designed for larger Gas/ Nitro powered models with many high draw servos that require a large power supply to run them all properly.

9/09/2009
rydfree (60%)
***********helidirect****/hobbywing-cubec-new-p-5211.hdx

The above link may be helpful in answering some questions.

29/07/2009
Erkan (71%)

Definitely do not recommend it, very stupid on / off switch

racer75 (-22%)
you can change the switch.....so i had done!

18/07/2009
=DeaD= (50%)
Hi,

Can anybody comment - what the included adapter do? (10cm long servo wire with some electronics in plastic shield and two servo connectors (male and female) on two sides)

Alvaro (58%)
you plug it between gyro and servo to reduce output voltage when switched to 6v to 5v so you do not burn expensive digital heli-tail servos like futaba 9257, which works preferently at 5v.

14/07/2009
limys04 (46%)
Hi,
I have one problem regarding the Turnigy 8A-15A UBEC. When I plug in my 2S lipo to the input plug, the 4 Leds and the output indicator light up regardless whether the on-off switch is on or off. I check the output supply and it show the right voltage. The on-off switch is not function to cut off power to the receiver( it appear to be alway on). ANyone please advise me is this the way the UBEC works?
Thanks.

racer75 (-22%)
than the switch have an defect.....you must know that when the switch is in really off that the BEC is on, that`s an extra safety function.....so when a cable breaks or the connections in the switch are demaged in fact of vibrations THE BEC is still on :)

8/07/2009
Erkan (71%)
Hi,

I have a question to ask about the problem of " TURNIGY 8-15A UBEC for Lipoly ".
When " On-Off " switch is " Off ", I connect a battery to system and battery indicator light lights up appear immediately.

When " On-Off " switch is " On " both battery indicator light and power light lights up.

I think no light should be lighted up while switch is not “*On”*.

What can I do about
Thanks for help,

limys04 (46%)
Hi,
I have one problem regarding the Turnigy 8A-15A UBEC. When I plug in my 2S lipo to the input plug, the 4 Leds and the output indicator light up regardless whether the on-off switch is on or off. I check the output supply and it show the right voltage. The on-off switch is not function to cut off power to the receiver( it appear to be alway on). ANyone please advise me is this the way the UBEC works?
Thanks.

eezfly (59%)
LEAVE THE SWITCH ON THEN PUT ANOTHER SWITCH IN BETWEEN THE UBEC AND THE BATTERY. HOPE THIS HELPS.

16/06/2009
NEPTUNESP2H (47%)
Hi Folks,

Could someone please advise me what are the two receiver plugs are for?

NEPTUNESP2H

NEPTUNESP2H (47%)

Anthony, Please||||

NEPTUNESP2H

eezfly (59%)
WHEN YOU USE ONE PLUG IT WILL ONLY PUT OUT ABOUT 5 AMPS PER PUG SO THEY GIVE YOU 2 SO AS TO DOUBLE THE AMPS TO THE RECEIVER OR SERVOS HOPE THIS HELPS.

10/06/2009
NEPTUNESP2H (47%)
Hi, Peter Mclean from Melbourne, I have just received the urnigy UBEC-15A to use i my Hangar 9 Pawnee which has 7 10kg Metal Geared Digital servos.

1. There is a red and black lead with a small red connector. Is this the input lead and can i convert the connector to a Deans to suit the 3s Lipo.
2. the lead with the ferrite ring has two connectors with diferent diameter leads, which one goes to the r/x and why two leads? Any asistance would be greatly appreciated.

Thanks.

NEPTUNESP2H (47%)
Sorry, the lipo should be 2S.

NEPTUNE SP2H

Eric1180 (-53%)
Two lead so you can power more then one receiver or for gas engines electronic ignition systems

racer75 (-22%)
1. yes you can....i did it too and it works perfectly in my 1,8m yak 55 2. at my, both have the same diameter.....and both come in the rx .... why? for a better voltage distribution

27/05/2009
ejet42 (53%)
Thanks for the reply - one more question: Since this is a switching BEC and can handle 2S or 3S LiPos, would I get approx. 50% more output (run time with same output load) from a 3S compared to a 2S LiPo (same capacity)?

Beaufighter (-25%)
Presumably, yes. (but remember, even a switching supply has losses)

Just remember that a 3S battery has 50% more weight than a 2S for the same capacity (one more equally heavy cell), so you get nothing for free...

ejet42 (53%)
Thanks for the response, Beaufighter. I understand perfectly. Now, how "up" on electronics are you? In one of the responses, one of the writers suggested when using BECs in parallel, he recommended a "Schlotzsky" diode - I assume in the output line of each, forward biased, to isolate the BECs from each other. What is a Schlotzsky Diode, and why would you need isolation between the two BECs anyway? Maybe if one failed and shorted, its diode would then block current to the short from the other, but such a failure would probably be outputting the full battey potential ....... that's all I can think of. Any thoughts?

Beaufighter (-25%)
I don't think a schottky diode would work all that well. It would protect against the busted circuit from draining power as you guessed, but it will probably increase the failure rate of the bec: Two becs in same circuit will work "against" each other. Both will try to supply the same voltage, but one "wins", supplying most of the current, and the other is running on "idle", making it run below its minimum current rating (All voltage regulators need a minimum current for running stable)

Use a specialized dual module (they are galvanicly separated, no voltage/current goes from one side to the other) if you want to use dual power is my advice:)

Or go for the Spektrum dual supply receiver (there may be other brands with that feature too)

racer75 (-22%)
NO.....the runtime is the same, but the BEC gets warmer, because it must reduce the voltage from 12,6v ( full 3s Lipo ) to 5 or 6v.....so when you use this with high ampere application it`ll get hot! drive this one with with 2s and you can use it surely 8A and more without problems.

NITROMETAN (50%)
If you want to connect in parallel two units,use 2 shottky diodes ore a double diode from computer power supply units.It works 100%.

Napstr (86%)
Racer, This is a switch mode regulator not a linear so it doesn't heat up much with the extra voltage and will allow additional runtime! it is not a resister cutting the voltage to get the output - it is using the watts in to generate the watts out! There are losses as in all devices but to get 1A output you will need around 0.85A from your 2S battery or 0.6A from your 3S - hence the 3S of the same capacity will last longer.

26/05/2009
ejet42 (53%)
I notice that most folks are powering this BEC with high mAh 2S LiPos. I had planned on using a 1300 mAh 2S and figured that with a 3A average drain, should get between 25 and 30 min. on the battery (since it has more voltage in than out). My typical flight times are 6-8 minutes. Am I missing something?

Beaufighter (-25%)
The general idea is to have more flighttime before charging the battery. Gas/nitro guys just fill their tank and are ready for a new flight, and may want more than one or two before their rx dies.

26/05/2009
NEPTUNESP2H (47%)
Hi Peter Mclean from MELBOURNE aUSTRALIA, I AM RUNNING 6 Hextronic HX12K 10 KG servos in an 80inch w/s Pawnee, would this ubec with a 2S 4900 Lipo be ok.

Thanks

RICHARD2609 (39%)
Very Reliable, Very easy to Use and Adapt

24/04/2009
johnfowles (50%)
I guess I'm doing something wrong but can't figure out what: the device is fed by a 2S pack. All LEDs are lit and Power output is lit too. The Spektrum 6200 receiver is powered by the BEC alright and is bound. But I don't get anything on the servos plugged in. They seem dead. Any help would be great.

Lyn (86%)
so.... whats the dealio with the dual receiver plugs. i used in a 50cc cap, and put the thin wire only into the receiver. all the servos are digital coreless... i was using a brand new 5000mah 2s lipo. i bought a unit and swapped with my freind, who had his one in his 50cc... it has been in it for around 6 months, and worked fine, then when i put it it my plane, it locked out, and luckily came back to life, and i got to land. i then turned it back on on the groud with the canopy off, and the ubec didnt seem to work (the lights were going stupid), i tested later when i got home, and it worked again?????? i am really looking for some help here... the only things that have changed are: the battery, the radio, the reciever. the radio is jr and certified in 06. the receiver is jr 10 channel pcm crystal.

do you beleive the reason why the ubec went funny was becuase i didnt have the thick receiver plug plugged in (aka i only had the thin one). thats the only thing that i can think of.?

Please help!!!!!!!!

racer75 (-22%)
why you don`t use both at the same time in your receiver, nothing`ll happen and when only 1 than the thick one.....

Napstr (86%)
the 2 plugs are necessary to get the current through the reciever plugs as the standard black/ red pins on a reciever are very similar to that found on the JST plugs which are only rated at 5 amps (and indeed a jst will plug into a reciever direct if the casing will allow it!) therefore to get 8 amps through to the reciever using the standard pins we need to split the current into smaller amounts - hence the 2 plugs - this avoids things heating up and the associated risks.

John (50%)
I want to use this regulator on an Airplane so I can power my receiver and servos using a 2S lipo. When I connect the lipo to the regulator it works and all leds light. The on-off switch only turns the power to the receiver on or off. I would much rather the switch turn the entire UBEC off and on so I could kill the power to the model when its parked.

You either have to disconnect the battery or install another switch to turn off the regulator or the leds run all the time. Why no on-off switch to turn the whole rig off?

biggbear (83%)
John, put the UBEC between the switch and the reciever.....not between the li-po's and the switch. I run mine****Battery** to On/Off switch**to Ubec or voltage regulator**to reciever. This way when you turn off the power switch, it shuts down the UBEC as well.

waynemia (74%)
I was disappointed in the voltage regulation of this device. It only supplied 5.28V at 3A load. This is a 12% drop in voltage. If you are counting on the V/I (power) combination for your servos, this is not great. You may be expecting to get 48 Watts continuous and 90 Watts burst. In fact you only have 42.24 to 79.2 respectively. This droop in voltage may be ok for some applications but not in others.

If you have higher current needs, I tested the regulator for 6V with 9V input and 9.5 A load. The voltage dropped to 3.3 VDC. At the 5V setting, the voltage output dropped to 2.9V.

Perhaps this regulator is defective. It is the first time it has been powered up. So far, I can't say this regulator is standing up to the specifications. I would like to know if anyone else has any measurements under load.

Gabriel (71%)
This UBEC will be enough in my CAP 27% with AR7000 and four hitec HS5645 and one Hobicco Cs-150?

waynemia (74%)
Measure the current of your receiver and servos under load. I suggest you need a bigger regulator if the total under load exceeds 2.5A.

Napstr (86%)
What? this is a 8 to 15A regulator? this should be fine unless your servos are drawing over 8 Amps under load and are under load most of the time. I would agree with your 2.5A figure if it was a 2A device but it's not and again you are testing the load current which falls under the 15A umbrella not the 8A. It is 8A constant - hence the two plugs as standard reciever plugs would struggle to deliver 5A without heating.

systemspecialis (63%)
I can't understand the logic in this. A Ubec for large amps is usefull on a large model which ,by definition, would probably have a 6S - 10S battery.
So the only way to use this is with a separate Lipo.

Beaufighter (-25%)
A UBEC is often prefered in small expensive models and helis, too. If the ESC fries, you may still be able to save the model...

But yes, I think that this particular high amp UBEC is meant mainly for separate rx lipo, which is a nice item for a gasser.

waynemia (74%)
In a large GAS plane, you need an ignition battery with voltages usually between 5 and 6 V. Although a lot of people think of this as just powering the receiver and servos, it is useful in glow and gas applications. As stated earlier, a large electric - 100Amps, you could be better off having a separate battery for the receiver/servos to maintain control in case of ESC failure.

racer75 (-22%)
yes that`s right, specially in gasers or nitro planes or helis

samsman (67%)
Hi..
Will it work well on 2s2p LiIon?

Beaufighter (-25%)
It will work with any battery type, as long as the voltage supplied is between 6V-12,6V. It does not have a low voltage cutoff, which you don't want in a UBEC, so it does not matter what kind of batt is used.

waynemia (74%)
In addition to meeting the input voltage rating, the battery must be able to supply the current. You should have a battery capable of supplying the rated output current. Your actual source current will actually be less than the output. Example, I tested the regulator at 6V. For 3.18A output, the input was 1.8A. If your battery can supply the desired output current, you will have no problems. If you are trying to save weight, you might be able to go about 20% less. Test it to make sure.

Fugitive_Bill (72%)
It's a shame it only takes up to 3s lipo not up to 6s. Guess Im stuck with the Turnigy 7amp. (I almost want to buy one and test it on 4s and see if it fries or not. a lot of stuff does handle more than rated/recommended voltages)

waynemia (74%)
I would not recommend trying that. Many US designed devices have as much as 100% over engineering. Most international standards are not that generous. You may be able to get and extra volt or so. You can't see any of the components due to the shield. The capacitors may not be rated for the additional voltage.

racer75 (-22%)
better don`t do this......

affffa (50%)
Can this one be used wit 2S A123 package?

samsman (67%)
7.2v? But the spec clearly states the input range is 6-12.6v. Confusing!! Please clarify this as I'm about to buy a few of them. I'll be using 2s2p LiIon.

waynemia (74%)
6V is a bare minimum if you are using it for 5V. You need more voltage to run it at 6V. My testing shows that 2V over the output voltage is best.

Tiledz (50%)
input is minimum 6v not sure for the a123

Napstr (86%)
I'd go for 3s A123 to be safe as that should put the input voltage between the 2s or 3S lipo this was designed for. A word of caution here though the Leds will most likely be useless for determining pack voltage if you did this as they are designed for Lipo

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