R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-20-2004, 04:35 PM   #1
Tech Apprentice
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default recommendations for 7.2V battery monitor?

Venom's only handles up to 6V:

http://www.venom-racing.com/product/batmon/index.htm

Are there options in a similar gizmo that can monitor the status of 7.2V-9.6V stick packs? Please send links.

Thanks,

Bill
[email protected]
billwilner is offline   Reply With Quote
Old 10-20-2004, 04:46 PM   #2
Tech Elite
 
Cole Trickle's Avatar
 
Join Date: Sep 2001
Location: Denmark / Europe
Posts: 2,571
Default

Hmmm. I cant see the point with this product.

1) It's in the car, so you cant read it while driving anyway.
2) Even a completely empty 6 cell NiMh and NiCd battery will maintain a voltage around 7,2 volt, when unloaded. So stopping the car to do the read wont work....
3) The car will drive slower, when the pack is close to empty, and that can be notised from the driver stand...

If you have to check how much capasity there's left after a race, you need to discharge the pack with a discharger, which can measure capasity, usually in mAh.

I would definately spend the money elsewhere.
__________________
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250
Cole Trickle is offline   Reply With Quote
Old 10-20-2004, 04:54 PM   #3
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

Good points, Cole Trickle. I think the main reason it only handles 6v is because it's intended for nitro receiver packs. Nitro receiver packs are not as easy to tell when they start losing performce via servo speeds.
j240z is offline   Reply With Quote
Old 10-20-2004, 04:56 PM   #4
Tech Apprentice
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default Dischargers?

OK, that all makes sense. What type or model discharger do you recommend?

Thanks,

Bill
billwilner is offline   Reply With Quote
Old 10-20-2004, 05:07 PM   #5
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

It will depend a bit on what type of motors you will use/race. 20a is generally used for stock motors and 30a for mods. I use Integy's 16x5 and 16x5v6 chargers which have a 20a discharge feature as well. I would recommend them as they perform great!

If you're on a budget you can build a bulb discharger to suit your amp needs.
Also, if you're serious about battery maintenance you can use an equalizer tray such as Novak's Smart Tray to discharge each individual cell to equal voltage.

I would recommend a high end charger with a built in discharger because it means less stuff to carry around.

Here's the charger I use:http://integy.automated-shops.com/cgi-bin/webc.cgi/st_prod.html?p_prodid=1682&p_catid=23&sid=4wSJJh10 60P1Bec-47104011930.a2

Or you can use a bulb discharger similar to this:

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXKX50&P=7


And here's the Smart Tray: http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGGJ0&P=ML
j240z is offline   Reply With Quote
Old 10-20-2004, 05:13 PM   #6
Tech Addict
 
j240z's Avatar
 
Join Date: Apr 2004
Location: Everybody to the limit!
Posts: 651
Default

oops. messed up on the links. They should work if you cut and paste....Sorry....
j240z is offline   Reply With Quote
Old 10-20-2004, 05:48 PM   #7
Tech Apprentice
 
Join Date: Sep 2004
Location: Huntington Beach, CA
Posts: 66
Default Chargers

Well, I'm new to all this and I'm learning as fast as I can!

I got a used FT TC3 on eBay that came with a bunch of extra stuff including a Dynamite Prophet Plus charger:

http://www.dynamiterc.com/Products/D...ductID=DYN4036

I got a couple of 7.2V NiMH 3000 "Rocket" sticks at Ultimate Hobbies (near me). Also got a HiTec MG625 servo on their recommendation.

Yesterday, I won a Novak SS5800 brushless motor/ESC set on eBay.

Now I'm shopping for either an M8 w/backlight or PK3 and a Novak Xxtra receiver.

And I'm working on a Yokomo RX-7 FC3S 190mm body.

So do I need a discharger too?

This is turning out to be a pretty expensive hobby, but not as much as my real car!

Thanks,

Bill
billwilner is offline   Reply With Quote
Old 10-20-2004, 08:25 PM   #8
Tech Adept
 
Join Date: Sep 2003
Location: Wisconsin
Posts: 140
Default

No a discharger is not a must have item. Especially since you are running stick packs and wont be able to equalize after discharge anyway.

Just run the packs until the car slows noticeably and then let them rest for at least a few hours before recharging.
Lano is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: motor monitor/ preformance monitor dingosrun Australia Wanted to Buy 0 01-15-2008 03:35 PM
17" LCD Monitor Kris Other Items: For Sale/Trade or Wanted to Buy 6 04-25-2006 05:24 AM
HELP:Kyosho v-one rr evo Rx battery recommendations etips76 Nitro On-Road 7 02-24-2004 06:45 AM
Battery Discharger Recommendations??? DEACON Electric On-Road 11 10-15-2003 06:16 AM
Battery charger recommendations morosis Electric On-Road 9 08-14-2003 09:39 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 02:08 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