R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-22-2005, 09:10 PM   #1
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default How to make a discharger?

I dont want to have to buy a discharge tray unless its 10 bucks including shipping. LOL. SOOOOOOOo, I want to make one.

Any tips or tricks?

Just use bulbs and what not?
adr3naline fix is offline   Reply With Quote
Old 08-22-2005, 11:58 PM   #2
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

cmon someones gota have an idea
adr3naline fix is offline   Reply With Quote
Old 08-23-2005, 12:05 AM   #3
Tech Elite
 
Piyo Piyo's Avatar
 
Join Date: Nov 2004
Location: Jakarta - INDONESIA
Posts: 3,051
Default

Using bulbs already in dinosaur era. Discharger is a must for every electric racers, unless you have a BIG budget to buy new battery every 2 months or ending up in 10th positions at every race you joined.
__________________
VIOLA ARIELLE & FLOREN ISABELLE
Piyo Piyo is offline   Reply With Quote
Old 08-23-2005, 03:47 AM   #4
Tech Regular
 
pyrosian's Avatar
 
Join Date: Jan 2005
Location: Jets Sports Club, Tempe
Posts: 356
Default

If you've only got a budget of $10 you'll be hard pressed to even build one yourself. I built a 20amp discharger with a 5.4 volt cutoff and i cost me almost $120AUS (like $80US) i could have simply bought one for that cost but i wanted to have some fun with electronics and as such learnt alot.
pyrosian is offline   Reply With Quote
Old 08-23-2005, 04:20 AM   #5
Tech Regular
 
Join Date: Aug 2005
Posts: 272
Default

does discharge tray work for 7.2v tamiya stick packs for my mini aswell?


thanks
noobie is offline   Reply With Quote
Old 08-23-2005, 04:40 AM   #6
Tech Elite
 
Jack2's Avatar
 
Join Date: Nov 2004
Location: Australia
Posts: 2,377
Trader Rating: 1 (100%+)
Default

noobie, No you can't use a discharge tray on your stick packs, the cells are assembled end to end, so they can not be individually discharged(without being taken apart). You can only "tray" packs that are assembled in Side-by-Side formation. But you still can(and should) dischage your packs, but you can't equalize each individual cell.
__________________
Schumacher Mi4CX
Mugen MTX & MRX

"He who dies with the most toys wins" - Phil Harris
Jack2 is offline   Reply With Quote
Old 08-23-2005, 07:10 AM   #7
Tech Addict
 
Jam-ehz's Avatar
 
Join Date: May 2005
Location: Toronto, Canada
Posts: 592
Trader Rating: 6 (100%+)
Send a message via ICQ to Jam-ehz
Default

For stick packs, the lightbulb is the easiest for my stick packs... 5 or 10 automotive lightbulbs in parallel (basically 2 amps per bulb - your choice) and use a 12V 30A relay with a trimpot to adjust the cutoff to 5.4V or whatever you want.

I think my whole unit with 10 #1157 bulbs and a relay was $25 CDN, and some creative use of scrap metal and wires. Just look up "Light bulb Discharger" and "Auto Cutoff Relay" in google, and I think Sanj's Yokomo page and balak racing will come up. Thankfully I'm surrounded by electronic parts stores, but the relay shouldn't be too hard to find. But trust me, get the cutoff unit, especially with 20A of bulbs discharging your pack at a very fast rate...
__________________
-=≡ Tamiya TA05 TRF415MSX F103R M-03R M-04 M-05 ≡=-
-=≡ CRC Carpet Knife 3.2 OFNA LD3 Pro Fastcats Spektrum ׀ווlı ≡=-
Jam-ehz is offline   Reply With Quote
Old 08-23-2005, 07:12 AM   #8
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

Whats a good electronic discharger?
Artificial-I is offline   Reply With Quote
Old 08-23-2005, 07:19 AM   #9
Tech Regular
 
Join Date: Aug 2005
Posts: 308
Trader Rating: 1 (100%+)
Default

Check http://www.schumacher.clara.net/equaliser.htm

I built one like that using simple alligator clips, so its not a "real" tray. anyways, it works.

Overall the cost was around 4 euros (1.5 for resistances, 0.6 for diodes and 2 for alligator clips).

Good luck for youre building!
Itchy is offline   Reply With Quote
Old 08-23-2005, 12:26 PM   #10
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

after seeing what can happen with a bulb discharger and how hard it is to build a tray discharger......i think i just may buy one for 30 bucks
adr3naline fix is offline   Reply With Quote
Old 08-23-2005, 12:47 PM   #11
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

Im lookling at the Trinity Absolute Zero Discharger

these are the specs

FEATURES: Light system to indicate pack and individual cell discharge status
Blue anodized aluminum case with composite faceplate
Can be used for standard discharging to 5.4V, 3.0V or even lower
for a deep discharge
Individual cell light stop at .85V
Green side lights stop below 5.4V
Red light stop below 3.0V

1) Im getting GP3300 packs, is this discharger what I want?

2) Are there any special steps I should take to discharging my battery packs?

Just wait till the bulbs are dim and then let it cool?
adr3naline fix is offline   Reply With Quote
Old 08-23-2005, 01:27 PM   #12
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

I just put in my bid on it.
adr3naline fix is offline   Reply With Quote
Old 08-23-2005, 01:31 PM   #13
Tech Addict
 
sonic31's Avatar
 
Join Date: Jun 2004
Location: Hollywood,FL.
Posts: 594
Trader Rating: 2 (100%+)
Default

for those who really know electronics building one from scratch is easiest but most of the time it tends to be more preference than money. there are plenty of discharging devices available, personally if i may suggest, buying a charger/discharger combo, of course this is the expensive route but the most effective, would probably be best. in any case, like i said there are plenty of discharge devices available.
later.
__________________
Tamiya TRF418 SAMIX / KO Propo / Tekin RS Pro / Spektrum
sonic31 is offline   Reply With Quote
Old 08-24-2005, 01:17 PM   #14
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

What about a discharger that has a cut off at 0.0V. Arnt they supposed to be cut off at .85v ?

Integy makes one thats pretty cheap. 14 in stores
adr3naline fix is offline   Reply With Quote
Old 08-24-2005, 01:34 PM   #15
Tech Apprentice
 
Join Date: Aug 2005
Location: Green Bay WI
Posts: 73
Send a message via AIM to adr3naline fix
Default

after reading a few things on dischargers I am so confused.

Can someone point me to a inexpensive discharger that will cut off at a safe point for my GP3300's?

these things All discharge AND equalize right?
adr3naline fix is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Best way 2 make a Homemade Discharger? jono mad racer Electric Off-Road 12 10-23-2007 04:01 PM
How to make cheap Discharger aus jd 2703 Australian Racing 10 07-08-2006 07:20 AM
Resistor type discharger with auto cut-off device, How do you make it? Marc_05 Australian Racing 49 07-17-2005 03:29 AM
Want to make my own discharger like Integy or Trinity. Fusedbrain Electric On-Road 13 04-15-2004 10:29 PM
Wanted Integy Octane 2 Discharger or Trinity Realtime 2 Discharger FUK_WRX R/C Items: Wanted to Buy 0 08-02-2003 05:23 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 10:02 PM.


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