R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-08-2005, 09:23 AM   #31
Tech Regular
 
New_Toasted's Avatar
 
Join Date: Nov 2003
Location: The Milkyway/Planet Earth/Europe/Sweden/Skåne/Malmö
Posts: 349
Default

Since we're talking about batteries here I have one question, what would be good settings (amps, peak mV) to use when charging

1) a 800 mAh 5 cell RX pack

2) a 2000 mAh 8 cell TX pack

?

And also, what determines how many amps the pack can take, the number of cells or the capacity?
New_Toasted is offline   Reply With Quote
Old 07-17-2005, 11:58 AM   #32
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

Hi all,

i`m intending to discharge my rx standard 6V 1100mah batts. but not intending to get a discharger yet. there`s a way using the light blub to monitor the discharge of the batts right? how do i do it? do i chack by looking at the bulb grow dimmer or just drain till there`s no more life left to light up the bulb.

Most important, what kind of buld should i get to do that? what voltage or watts should i be looking at?

Thanks a bunch.
dct147 is offline   Reply With Quote
Old 07-17-2005, 12:24 PM   #33
Moderator
 
Artificial-I's Avatar
 
Join Date: Jan 2005
Location: Rurouni Kenshin
Posts: 3,459
Trader Rating: 17 (100%+)
Send a message via AIM to Artificial-I
Default

1amp discharge
1157 automotive bulb (dual filament auto bulb)

http://rcnitro.com/rn/articles/gs_batteries2.asp

Goto the middle section "Discharging" for more explanation and itll show the bulb and how to wire it.
Artificial-I is offline   Reply With Quote
Old 07-17-2005, 12:47 PM   #34
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,319
Trader Rating: 28 (100%+)
Default

Leave the bulb on until you see the light dim down alot. Then take it off. Don't leave it on until it goes completely out.
jbrow1 is offline   Reply With Quote
Old 07-17-2005, 01:10 PM   #35
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Quote:
Originally Posted by jbrow1
Leave the bulb on until you see the light dim down alot. Then take it off. Don't leave it on until it goes completely out.
If you forget to remove it ( the light is completely out ) you should give some charge. NiMH battery need some volts before storing. You can discharge and recharge it again to get maximum runtime.

For Rx batt ( AAA 850 ) : 0.8A - 1A charge ; 1A discharge ; 25mV delta peak
For Tx batt ( AA 2300 ) : 1.2 A charge ; 1A discharge ; 25mV delta peak

I use 12V double filament automotive bulb ( usually for car left/right lamp signal ). One bulb equals 1 amp. It's safe for discharging Tx/Rx without frying the cables.
asw7576 is offline   Reply With Quote
Old 07-17-2005, 01:13 PM   #36
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

Thanks for the info.

I have read and understand. but i`m not sure what bulb is that still.it`s called a 1154 bulb at 1amp. i don`t see anything about amp at my hardware stores here. only about Voltage. is there anything about voltage i should look at?

also, was doing the calculation for the charge time about the input. my charger only shows options of AC output - 4.8v , 6v, 9.6v, 12v.

another part shows AC input - 100-120v/220-240v 7W.

i don`t quite understand it. i`m using a trickel charger.

Could anyone help me out pls?

Thanks a bunch....
dct147 is offline   Reply With Quote
Old 07-17-2005, 01:36 PM   #37
Moderator
 
Artificial-I's Avatar
 
Join Date: Jan 2005
Location: Rurouni Kenshin
Posts: 3,459
Trader Rating: 17 (100%+)
Send a message via AIM to Artificial-I
Default

Quote:
Originally Posted by dct147
Thanks for the info.

I have read and understand. but i`m not sure what bulb is that still.it`s called a 1154 bulb at 1amp. i don`t see anything about amp at my hardware stores here. only about Voltage. is there anything about voltage i should look at?

also, was doing the calculation for the charge time about the input. my charger only shows options of AC output - 4.8v , 6v, 9.6v, 12v.

another part shows AC input - 100-120v/220-240v 7W.

i don`t quite understand it. i`m using a trickel charger.

Could anyone help me out pls?

Thanks a bunch....
It should be called a dual filament automotive bulb.

The part number is 1157. Its a very standard auto motive bulb I believe used for the brake lights if that helps any.
Artificial-I is offline   Reply With Quote
Old 07-17-2005, 01:39 PM   #38
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

Thanks Artificial-I.

I`ll try finding it at my hardware store!

Cheers!!
dct147 is offline   Reply With Quote
Old 07-17-2005, 01:48 PM   #39
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

asw7576,

Thanks for your help.

What is 25mv delta peak?
dct147 is offline   Reply With Quote
Old 07-20-2005, 10:27 AM   #40
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

Hi again guys,

I`ve finally got my 12v single filament bulb, and it proves very effective.

didn`t say anything about the amps though. but as long as it serves it`s purporse.

anyway, i`m now looking to discharge my glow heater rechargable battery. it`s a standsrd GP 3300 C size battery. how should i discharge it? i tried taping the red wire to the positive side and the black to the negative. bulb didn`t light up.

Any tips on this?
dct147 is offline   Reply With Quote
Old 07-20-2005, 11:03 AM   #41
Moderator
 
Artificial-I's Avatar
 
Join Date: Jan 2005
Location: Rurouni Kenshin
Posts: 3,459
Trader Rating: 17 (100%+)
Send a message via AIM to Artificial-I
Default

Quote:
Originally Posted by dct147
Hi again guys,

I`ve finally got my 12v single filament bulb, and it proves very effective.

didn`t say anything about the amps though. but as long as it serves it`s purporse.

anyway, i`m now looking to discharge my glow heater rechargable battery. it`s a standsrd GP 3300 C size battery. how should i discharge it? i tried taping the red wire to the positive side and the black to the negative. bulb didn`t light up.

Any tips on this?
Might already be dead or it might just not have touched correctly. Also could be the bulb wiring / soldering itself is a perhaps not fully connected.

Retry another battery to make sure your bulb is discharging.

Yeah they probably wont say 1amp on the package , but these bulbs generally take about 1amp.
Artificial-I is offline   Reply With Quote
Old 07-20-2005, 11:12 AM   #42
Tech Regular
 
dct147's Avatar
 
Join Date: Jan 2005
Location: Singapore
Posts: 350
Default

Heater`s fine. tested it on a plug. it glowed.

Bulb`s fine. tested it with my Rx batts.

Probably didn`t get a full connection.

Is there a rule where the black and red should be at? + -?
dct147 is offline   Reply With Quote
Old 07-20-2005, 11:18 AM   #43
Moderator
 
Artificial-I's Avatar
 
Join Date: Jan 2005
Location: Rurouni Kenshin
Posts: 3,459
Trader Rating: 17 (100%+)
Send a message via AIM to Artificial-I
Default

Red is positive + , black is negative -.
Artificial-I is offline   Reply With Quote
Old 07-20-2005, 11:38 AM   #44
Tech Elite
 
fastharry™'s Avatar
 
Join Date: Sep 2001
Location: Mahwah, NJ.. USA!! ..... Home of http://www.fastharry.com
Posts: 2,846
Trader Rating: 4 (100%+)
Send a message via Skype™ to fastharry™
Default

Quote:
Originally Posted by XrayEye
Try this.

Very good checker/discharger for tx and rx batteries

http://www2.towerhobbies.com/cgi-bin...&I=LXEYM6&P=ML

says right in the product description can't be used on transmitter packs...
__________________
www.fastharry.com---search "fastharry" on facebook
See Fastharry in Super Nitro racing at the HPI CHALLENGE...
http://www.youtube.com/watch?v=jzo-cBEnE0c
fastharry™ is offline   Reply With Quote
Old 07-20-2005, 11:51 AM   #45
Tech Master
 
Rapid Roy's Avatar
 
Join Date: Oct 2002
Location: L.A. (Rowland Hts)
Posts: 1,531
Default

One cell is only 1.2 volts. The bulb is rated for 12 volts which is why you arn't getting it to light up. I haven't figured out a good way to discharge the glow starter yet. I have used a flashlight bulb and simply pluged it into the end of the glow starter. The other way is to use a messed up glow plug that still glows and plug it in. The best way would be to use a discharging tray like the electric guys use. I have really given up on discharging my igniter battery though. A couple of years ago I picked up a 5000 mah igniter made by Hobico. That sucker has a lot of juice. I race with my son, and I have had race days where both cars were giving me engine problems and I had the igniter on a LOT and havn't had any problems with it running down. I drained my dual stick pack starter batteries twice in the process. I have since gone to a 12 volt gel cell on my starter. Heavy as heck, but no wories on running out of power.
Rapid Roy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Discharging 5 cell packs....?!?! Island Losi Electric On-Road 2 01-29-2008 04:10 PM
Pulse vs Linear DISCHARGING (also vs Multi-step discharging) akuhon Electric On-Road 5 01-01-2007 11:58 PM
discharging whilst packs on a tray??? xray racer Electric On-Road 8 08-27-2005 10:29 AM
Discharging receiver packs revzalot Nitro On-Road 3 04-08-2005 03:01 PM
Discharging Stick Packs f2000racer Electric On-Road 7 01-15-2005 01:38 PM



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 08:35 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net