RC-Monster Forums  
RC Monster

Go Back   RC-Monster Forums > Support Forums > General Electric

Reply
 
Thread Tools Rating: Thread Rating: 32 votes, 4.94 average. Display Modes
Old
  (#151)
kazuaki
RC-Monster Carbon Fiber
 
Offline
Posts: 175
Join Date: Jun 2009
Location: Murrieta, CA
02.01.2011, 11:05 AM

Quote:
Originally Posted by lincpimp View Post
I did something similar a while back. Not as nice, but it worked.



I like that, nice and heavy duty!!
   
Reply With Quote
Old
  (#152)
BrianG
RC-Monster Admin
 
BrianG's Avatar
 
Offline
Posts: 14,609
Join Date: Nov 2005
Location: Des Moines, IA
02.05.2011, 08:13 PM

Another little update for this little PS unit.

I got another one of these and was doing my voltage boost mod when I accidentally discovered the ground connection for the sense/feedback circuit is not even needed. After doing some more playing around, a 1.5k ohm resistor between the main 12v terminal and pin 5 is all that is needed to boost the output to 13.2v.

BTW, the max voltage you can get out of this is around 13.5v. At 13.6v, the PS shuts down.

Also, for those that think the fan is a bit loud on 12v: If you run this PS at 25A or more for extended periods (>1/2 hour), the air coming out the back is pretty toasty. I figure even if this unit is 90% efficient, 35A @ 13.2v is 528w which will produce 53w of heat. That's quite a bit, so if you do turn down the fan, I wouldn't go too far.
  Send a message via Yahoo to BrianG Send a message via MSN to BrianG  
Reply With Quote
Old
  (#153)
Metallover
RC-Monster Spudgunner
 
Metallover's Avatar
 
Offline
Posts: 2,353
Join Date: Apr 2008
Location: South Dakota
02.05.2011, 08:23 PM

Brian you're the man! Thanks for posting!!
  Send a message via AIM to Metallover Send a message via MSN to Metallover  
Reply With Quote
Old
  (#154)
mamba max1
RC-Monster Carbon Fiber
 
mamba max1's Avatar
 
Offline
Posts: 127
Join Date: Jun 2010
02.05.2011, 11:48 PM

Here's mine, but with a 42A PS. When I charge 2 lipos (3s 5800) at 2C (11.6A each for a total of 23.2A from the PS) it barely even gets warm.
















Yes, the lid is burnt. After I went through the extreme hassle of making a false bottom that fit (major PITA) the charger did not fit. I was not about to toss all my work in the trash so I softened the lid up with a lighter and expanded the it a bit. Made it fit. I use the velcro from hobbycity to hold everything in place. Plus a side to barely fitting is it doesn't rattle around inside at all, even when upside down. The velcro is crazy, its a bear to pull the charger and PS out of the box.

I have the charger plugging into the false bottom so that I can unplug it from there and into some alligator clamps for charging from a car. :) BTW, the box is amazing. Makes charging easy, and portable while keeping it protected.

Last edited by mamba max1; 02.05.2011 at 11:52 PM.
   
Reply With Quote
Old
  (#155)
aggie4231
Guest
 
Posts: n/a
03.05.2011, 11:27 AM

ok for a semi-noob. With the original ps, which main line do you use for the charger(outsides or insides)? Can you use it to power 2 chargers off of different sets of lines?
   
Reply With Quote
Old
  (#156)
fordman86
Guest
 
Posts: n/a
03.08.2011, 06:22 PM

Ok BrianG I took off the hot swap connector like this http://sites.google.com/site/tjinguy...projects/HP47A
wondering whow would I put the 1.5k ohm in to boost volts and what watt of resistor did you use? I have 12.45 now.

Last edited by fordman86; 03.08.2011 at 06:24 PM.
   
Reply With Quote
Old
  (#157)
BrianG
RC-Monster Admin
 
BrianG's Avatar
 
Offline
Posts: 14,609
Join Date: Nov 2005
Location: Des Moines, IA
03.08.2011, 07:45 PM

Quote:
Originally Posted by fordman86 View Post
Ok BrianG I took off the hot swap connector like this http://sites.google.com/site/tjinguy...projects/HP47A
wondering whow would I put the 1.5k ohm in to boost volts and what watt of resistor did you use? I have 12.45 now.
Honestly, if you are getting 12.45v now, there really is no reason to mess with it. ~13.2v is not a whole lot more voltage for the work required. But if you still want to:

The pic below is the first PS I modded before I realized I didn't need as many wires, but all you need to do is attach the 1.5k ohm resistor to the red and white wires (the ground isn't needed). Resistor wattage can be your typical 1/4w.



In this pic, you can also see the jumper wires I added to turn the supply on without having to mess with the little pins.

Be aware that I cut the standalone purple and blue wires (-12v and 5v aren't used) and cut away the PCB where they attached to give me room for those white and red wires in the pic above.
  Send a message via Yahoo to BrianG Send a message via MSN to BrianG  
Reply With Quote
Old
  (#158)
fordman86
Guest
 
Posts: n/a
03.08.2011, 08:18 PM

Ok will leave be but I modded even further and took that whole board out per the link I posted before. It's at the bottom of the page.
   
Reply With Quote
Old
  (#159)
Divey1130
Guest
 
Posts: n/a
03.14.2011, 08:44 PM

Just finished mine and wanted to share it. What an awesome power supply that has tons of power. This thread is what got me started and I thank everyone here for your knowledge and support.

Terry
http://www.youtube.com/watch?v=KB_MghvoqHE
   
Reply With Quote
Old
  (#160)
BrianG
RC-Monster Admin
 
BrianG's Avatar
 
Offline
Posts: 14,609
Join Date: Nov 2005
Location: Des Moines, IA
03.15.2011, 12:04 AM

I just posted why you are getting 17v on your YT vid, but for some odd reason, it appears to be posted from peterscalab??
  Send a message via Yahoo to BrianG Send a message via MSN to BrianG  
Reply With Quote
Old
  (#161)
Divey1130
Guest
 
Posts: n/a
03.15.2011, 12:39 AM

Quote:
Originally Posted by BrianG View Post
I just posted why you are getting 17v on your YT vid, but for some odd reason, it appears to be posted from peterscalab??
I saw that. That's weird. Thanks for clarifying that up for me. I understand now.
   
Reply With Quote
Old
  (#162)
fordman86
Guest
 
Posts: n/a
03.18.2011, 05:43 PM

Here's mine all done

   
Reply With Quote
Old
  (#163)
snellemin
2 KiloWatt RACER
 
snellemin's Avatar
 
Offline
Posts: 2,496
Join Date: May 2007
Location: Houston
03.18.2011, 05:47 PM

That blue right thur is gansta. Looking good man.


6 KiloWatt A123 Racer
GTP-Pletty Big Maxximum+RX8. GTP-C50-6L Hacker+RX8. CRT.5-Pro4+ZTW esc.
24s2p EVG SX 49.6mph Ebike.
18s4p Raptor 60mph Ebike. 11.5KW
   
Reply With Quote
Old
  (#164)
silentbob343
RC-Monster Carbon Fiber
 
Offline
Posts: 112
Join Date: May 2007
03.19.2011, 03:44 AM

Quote:
Originally Posted by Divey1130 View Post
Just finished mine and wanted to share it. What an awesome power supply that has tons of power. This thread is what got me started and I thank everyone here for your knowledge and support.

Terry
http://www.youtube.com/watch?v=KB_MghvoqHE
Hot swap and IIRC the 208B requires 18v to support 350w.

I see Brian already answered the 17v question.

Last edited by silentbob343; 03.19.2011 at 03:51 AM.
   
Reply With Quote
Old
  (#165)
mistercrash
Guelph, Canada, eh!
 
mistercrash's Avatar
 
Offline
Posts: 1,083
Join Date: Sep 2007
Location: Guelph, Ontario, Canada
03.19.2011, 03:02 PM

I haven't read all the posts in the thread so sorry if this has been discussed. I have read in here that if you go with two server PS to have a 24V power supply, the two can't be touching because you have to remove the AC ground on one of the units. I hope I understood correctly. This guy here says that he removed the DC ground on one of the units instead retaining the AC ground on both units so the boxes can touch with no problems.





Maybe someone with more knowledge than me can confirm that this way of doing it is safe.


No brain, no headaches.

Last edited by mistercrash; 03.19.2011 at 03:07 PM.
   
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump



RC Monster




Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
vBulletin Skin developed by: vBStyles.com