R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 01-20-2010, 01:50 AM   #1
Tech Initiate
 
Join Date: Jul 2009
Posts: 33
Trader Rating: 2 (100%+)
Default LiPo Receiver Pack Questions

Hi

I just ordered a 2300mAh 7.4V receiver LiPo to run in my Losi 8ight and have a few questions:

1. What else do I need to run it on a standard receiver? I already have a charger with a balancer so I think I need a regulator. Do you need to run a balancer thing whilst it's in the car or just when charging?

2. What amperage should I charge it at? I've heard you divide the mAh by 1000, so that would mean about 2 amps, is that right?

Cheers
Ben
teamshaw is offline   Reply With Quote
Old 01-20-2010, 05:18 AM   #2
Tech Adept
 
Join Date: Jan 2009
Location: Alexandria,KY.
Posts: 105
Trader Rating: 1 (100%+)
Default

Most lipo packs can only be charged at a 1C rate max, which for a 2300MAH would be 2.3 amps.Unless you are running a spektrum RX you will need a regulator to be safe.There are a few different regulators on the market, depending on what servos you run you will need to adjust. If your running high torque,high speed servos you will need atleast a 5 amp regulator, if not you can probably get away with a 3 amp. one thing to remember is to ALWAYS unplug your regulator from the battery when your not using it. Even in between heats if your a racer, they constantly draw off of the lipo even if your switch is off. Hope this helps
Sholler is offline   Reply With Quote
Old 01-20-2010, 05:27 AM   #3
Tech Master
 
gkn0315's Avatar
 
Join Date: Feb 2009
Location: Bay City MI
Posts: 1,690
Trader Rating: 126 (100%+)
Default

[QUOTE=Sholler;6880048]Most lipo packs can only be charged at a 1C rate max, which for a 2300MAH would be 2.3 amps.Unless you are running a spektrum RX you will need a regulator to be safe.There are a few different regulators on the market, depending on what servos you run you will need to adjust. If your running high torque,high speed servos you will need atleast a 5 amp regulator, if not you can probably get away with a 3 amp. one thing to remember is to ALWAYS unplug your regulator from the battery when your not using it. Even in between heats if your a racer, they constantly draw off of the lipo even if your switch is off. Hope this helps[/QUOT

+1
__________________
Glenn Nail

STRC LCG Slash looking for electronics

1985 Associated RC 10 Novak t4 Trinity Monster Horsepower 27T futaba Jr
gkn0315 is offline   Reply With Quote
Old 01-20-2010, 12:43 PM   #4
Tech Initiate
 
Join Date: Jul 2009
Posts: 33
Trader Rating: 2 (100%+)
Default

Thanks for the great info guys.

I have a Spektrum SR3000 receiver so does that mean I don't need the regulator? Will the extra voltage harm the servos or is the receiver smart enough to handle that?

Cheers
Ben
teamshaw is offline   Reply With Quote
Old 01-20-2010, 12:50 PM   #5
Tech Initiate
 
Join Date: Dec 2009
Location: Brighton,UK
Posts: 26
Default

Quote:
Originally Posted by teamshaw View Post
Thanks for the great info guys.

I have a Spektrum SR3000 receiver so does that mean I don't need the regulator? Will the extra voltage harm the servos or is the receiver smart enough to handle that?

Cheers
Ben
The receiver can handle upto 9.6v,but unless you have high voltage servos,you will need a regulator.The lifepo receiver packs are good as you don't need a regulator or hv servos,but don't think anyone makes them to fit the Losi box.
dodger is offline   Reply With Quote
Old 01-20-2010, 05:02 PM   #6
Tech Master
 
blade954's Avatar
 
Join Date: May 2009
Location: Perth, Western Australia
Posts: 1,199
Trader Rating: 23 (100%+)
Default

We run the HT brand of regulator and have found them great they even come with a little heat sink to aid in cooling so we have never had a issue with over heating, our package is now 18 months old and still going strong only replaced a 9351 steering servo due to gears breaking in a truggy.

http://www.amainhobbies.com/product_...or-with-Switch
blade954 is offline   Reply With Quote
Old 01-24-2010, 08:37 PM   #7
Tech Regular
 
aray's Avatar
 
Join Date: Sep 2009
Posts: 368
Trader Rating: 8 (100%+)
Default

[QUOTE=gkn0315;6880066]
Quote:
Originally Posted by Sholler View Post
Most lipo packs can only be charged at a 1C rate max, which for a 2300MAH would be 2.3 amps.Unless you are running a spektrum RX you will need a regulator to be safe.There are a few different regulators on the market, depending on what servos you run you will need to adjust. If your running high torque,high speed servos you will need atleast a 5 amp regulator, if not you can probably get away with a 3 amp. one thing to remember is to ALWAYS unplug your regulator from the battery when your not using it. Even in between heats if your a racer, they constantly draw off of the lipo even if your switch is off. Hope this helps[/QUOT

+1
I just got a lipo and reg, trying to learn a bit... even if the regulator is on the opposite side of the switch from the lipo, it still will draw through the switch if it's turned off?

right now I have:

6v -> switch -> receiver -> servos
|
charge lead

Will this work:

lipo -> switch -> regulator -> receiver -> servos
|
charge lead


If I wire it this way, is there still some danger in the regulator discharging the lipo through the switch?

Thanks
aray is offline   Reply With Quote
Old 01-24-2010, 09:31 PM   #8
Tech Adept
 
Join Date: Jan 2009
Location: Alexandria,KY.
Posts: 105
Trader Rating: 1 (100%+)
Default

That I am not sure of, because I have never tried that method.The only reason I stressed that you unplug the lipo between heats is once the lipo is drained beyond a certain point, they are dead for good.I learned that lesson the hard way, luckily it was only a $17 dollar pack.Maybe someone else has ran that setup and might chime in for us, but personally I would still unplug it, nothing ticks me off more then running in warmup before the heat and something go wrong with my truggy..
Sholler is offline   Reply With Quote
Old 01-24-2010, 09:53 PM   #9
Tech Elite
 
COBRARACING's Avatar
 
Join Date: Nov 2007
Posts: 3,300
Default

recievers and servo electronics have a tolerence of 9v its the motor that cannot handle the 7.4v .max voltage a none hV servo can handle is 6.6volt max

Lifep04 rx packs can be run dead flat not like lipos to a certain point and no regulator is needed
__________________
Email : teamcobraracing@gmail.com or ae@hobbywing.com
Repair service Address
Hobbywing Technology Co., Ltd.
4th Floor, 3rd Building, KeLunTe Industrial Park, ShangLiLang, BuLan Road, LongGang District, ShenZhen, China
COBRARACING is offline   Reply With Quote
Old 01-24-2010, 10:07 PM   #10
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

[QUOTE=aray;6902463]
Quote:
Originally Posted by gkn0315 View Post

I just got a lipo and reg, trying to learn a bit... even if the regulator is on the opposite side of the switch from the lipo, it still will draw through the switch if it's turned off?

right now I have:

6v -> switch -> receiver -> servos
|
charge lead

Will this work:

lipo -> switch -> regulator -> receiver -> servos
|
charge lead


If I wire it this way, is there still some danger in the regulator discharging the lipo through the switch?

Thanks
thats how you do it
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 01-25-2010, 01:12 AM   #11
Tech Master
 
CanyonCarverR1's Avatar
 
Join Date: Jan 2008
Location: NorCal
Posts: 1,340
Trader Rating: 13 (100%+)
Default

[QUOTE=houston;6902847]
Quote:
Originally Posted by aray View Post

thats how you do it
+1
CanyonCarverR1 is offline   Reply With Quote
Old 01-25-2010, 08:03 AM   #12
Tech Fanatic
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Hamilton, Ontario, Canada
Posts: 991
Trader Rating: 2 (100%+)
Default

[QUOTE=aray;6902463]
Quote:
Originally Posted by gkn0315 View Post

I just got a lipo and reg, trying to learn a bit... even if the regulator is on the opposite side of the switch from the lipo, it still will draw through the switch if it's turned off?

right now I have:

6v -> switch -> receiver -> servos
|
charge lead

Will this work:

lipo -> switch -> regulator -> receiver -> servos
|
charge lead


If I wire it this way, is there still some danger in the regulator discharging the lipo through the switch?

Thanks
That's what I been doing for 1 year now, your OK if install the regulator directly on the receiver.
__________________
Rui Almeida
Hamilton, Ontario
CANADA
I am not sponsored, these are the products I chose to support.
Serpent SRX8, Sanwa M11s, Sanwa SRX-BX servos, Picco 5TB
RAlmeida is offline   Reply With Quote
Old 01-25-2010, 09:04 AM   #13
Tech Regular
 
aray's Avatar
 
Join Date: Sep 2009
Posts: 368
Trader Rating: 8 (100%+)
Default

[QUOTE=houston;6902847]
Quote:
Originally Posted by aray View Post

thats how you do it
Thanks all for the answer and confirmation.
aray is offline   Reply With Quote
Old 04-05-2010, 05:34 PM   #14
Tech Apprentice
 
1lowtaco's Avatar
 
Join Date: Dec 2005
Location: Frederick , MD
Posts: 84
Default

this thread has answered half of my questions . Here are some more: Do I need to run a lipo cut-off too? My regulator is adjustable, what should I set it for?? The default is 5.1. Should I turn it up to 6v?
1lowtaco is offline   Reply With Quote
Old 04-06-2010, 12:22 PM   #15
Tech Apprentice
 
1lowtaco's Avatar
 
Join Date: Dec 2005
Location: Frederick , MD
Posts: 84
Default

Quote:
Originally Posted by 1lowtaco View Post
this thread has answered half of my questions . Here are some more: Do I need to run a lipo cut-off too? My regulator is adjustable, what should I set it for?? The default is 5.1. Should I turn it up to 6v?
Anybody???
1lowtaco is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Lipo Reciever Pack CREWMAN Nitro On-Road 7 12-30-2008 06:48 PM
Lipo receiver pack/regulator question thecman26 Nitro Off-Road 16 05-06-2008 01:56 PM
Lipo Receiver pack...need some info pumpkinfish Nitro Off-Road 40 01-16-2008 08:19 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:31 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net