converting comp power supply for Dymond Super Turbo  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


NEW TENERGY 30C 2200mah 3s Lipos - FREE SHIPPING
Seller:  punkindrublik
Details:   $55.00   |  8/25/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> converting comp power supply for Dymond Super Turbo
Page: [1] 2 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
converting comp power supply for Dymond Super Turbo - 7/8/2002 8:55:11 PM   
RabidDragon


 

Posts: 28
Joined: 3/13/2002
From: Winter Haven, FL
Status: offline 		I have an old comp power supply the labels on it read:

+5v == 18.0a -5v == 0.3a
+12v == 6.0a -12v == 0.3a
+5vsb == 0.7a -3.3v == 10.a

If I understand this correctly it only supplies 6 amps to the "hard drive" wires, which is not enough for the Super Turbo that needs 7a. Is it possible to tie together the +5v and +12 volt to get the voltage and amps I need or is this power supply worthless for my charger?

need: 10.5 - 15 volts
7amps or more

thanks
       Post #: 1

converting comp power supply for Dymond Super Turbo - 7/8/2002 9:49:44 PM   
RetUSAF


 

Posts: 36
Joined: 6/20/2002
From: Vancouver (not B.C.), Washington (not D.C.)
Status: offline 		I put together one a couple of weeks ago, works great for the ST. However:

I would NOT tie 5 v to 12v!!

I would wager that 6 A will work for most charging situations, as long as you aren't charging huge batteries. That said, I would suggest going to your local computer store, explain what you are doing, and ask if they have an AT power supply in their junk bin.

My local store gave me one--free-- (Thanks, Wintech!!), that the tech even checked it out. 9 A @ 12 v....For that price, why risk using an underpowered PS??

The AT power supply isn't compatible with current motherboard designs, but it works great for this use. Just tie all the yellow wires together (+12v), all the black ones (ground), and the red ones if you want 5v available too.

I cleaned up some of the other wiring (clipping, wrapping, ties), just pay attention to where the 110 stuff goes...I added a couple of banana jacks, and placed an on/off switch in line with the 110 v lead to the circuit board (got rid of the original computer push button.)

I also added a 10 ohm, 10 watt wire wound resistor across the 5 volt leads ($1.69 for 2 at Radio Shack). Actually, I just plugged it into the mini-drive plug, red and black, and it increased my voltage at the 12 v side from 11.2 to 11.7v I think.....

Hope this helps.

Doug

(in reply to RabidDragon)
       Post #: 2

converting comp power supply for Dymond Super Turbo - 7/8/2002 10:27:55 PM   
RabidDragon


 

Posts: 28
Joined: 3/13/2002
From: Winter Haven, FL
Status: offline 		yea... thats what I thought but I had this little hope....

I actually already bought that exact resistor from radio shack

So you think I could charge a 8 cell 2150 NiMi (the biggest I have) with just the 6amps?
I will ask around for another supply too.

Thanks

(in reply to RabidDragon)
       Post #: 3

converting comp power supply for Dymond Super Turbo - 7/8/2002 11:34:11 PM   
RetUSAF


 

Posts: 36
Joined: 6/20/2002
From: Vancouver (not B.C.), Washington (not D.C.)
Status: offline 		One more thing, the biggest problem I had after bashing the wiring inside was making sure that no wires interfered with the fan when I put the cover back on!!

Make sure the fan still turns, or go back and re-arrange your wiring!!

I'm not sure on the max battery size...I know there are formulas to calculate what's needed, but I'll leave that to someone with more expertise than me!!

Doug

(in reply to RabidDragon)
       Post #: 4

converting comp power supply for Dymond Super Turbo - 7/9/2002 12:18:22 AM   
RabidDragon


 

Posts: 28
Joined: 3/13/2002
From: Winter Haven, FL
Status: offline 		*SIGH*

Ok new problem, the ps does not have a on-off button I hooked up the resistor to "hard drive" yellow-black and pluged it in.... nothing, fan does not move and no power to the bat charger when I attach the clips to the red and black wires. Any idea what is wrong?

(in reply to RabidDragon)
       Post #: 5

converting comp power supply for Dymond Super Turbo - 7/9/2002 12:32:48 AM   
flatfour



Posts: 597
Joined: 12/29/2001
From: Midlothian, IL, USA
Status: offline 		Yes!!!

You have it backwards. Yellow wires are +12 and should go to ST.
Red wires are +5 and should go to resistor. Careful, the resistor will get HOT!!!!

If you have an ATX power supply (Single motherboard connector) you will not be able to turn it on as they have logic control of the on-off


_____________________________

Jim in Chicagoland

(in reply to RabidDragon)
       Post #: 6

converting comp power supply for Dymond Super Turbo - 7/9/2002 4:33:52 AM   
embpic1



Posts: 147
Joined: 5/9/2002
From: Tucson, AZ,
Status: offline 		I bought the Dymond ST about six months ago and decided to use a PC power supply. One thing I found interesting was that the power supply would only turn on when a load was placed on it. After buying the PS I found that the fan would not come on when I turned it on. I thought I had a bad one. After hooking up the Dymond, the PS fired right up. I have not used the resistor technique as described in the previous posts. I just used one of the 12V leads (even though output is only 11.4V) and have had no problems.

(in reply to RabidDragon)
       Post #: 7

converting comp power supply for Dymond Super Turbo - 7/9/2002 9:35:52 PM   
flatfour



Posts: 597
Joined: 12/29/2001
From: Midlothian, IL, USA
Status: offline 		The 12V will come up to spec if you put a load on the 5V line.
I dug around for a resistor, but found an old H3 halogen 35 watt fog light bulb. Works great.


_____________________________

Jim in Chicagoland

(in reply to RabidDragon)
       Post #: 8

converting comp power supply for Dymond Super Turbo - 8/18/2002 8:35:56 AM   
sgtladich



Posts: 29
Joined: 2/25/2002
Status: offline 		Anyone know which wires to short on the ATX motherboard cable to turn on the supply?

(in reply to RabidDragon)
       Post #: 9

converting comp power supply for Dymond Super Turbo - 8/18/2002 11:04:02 AM   
pepito9



Posts: 63
Joined: 4/30/2002
From: caracasmiranda, VENEZUELA
Status: offline 		green black SHORT
red black RESISTOR
yellow black 12V power

diego

_____________________________

i used to be modest.... now i´m PERFECT

(in reply to RabidDragon)
       Post #: 10

converting comp power supply for Dymond Super Turbo - 8/20/2002 2:46:38 AM   
hebertjj


 

Posts: 323
Joined: 1/18/2002
From: Knoxville, TN, USA
Status: offline 		Dragon,

Careful what you do there with that PS. You're correct that the Dymond ST spec say it needs 7 amps. It doesn't use 7 amps all the time, but if you try to charge at the higher rates, 4 to 5 amps, it's going to try and overload your PS. I don't know which will shut down first, the ST or the PS. You may have a smoker on your hands. If you don't charge above 4 amps I think you can get away with it, buuuuut ... I ain't advising it. Usually the older PS have higher 12V ratings than the newer ones, so try and find an older PS.

Short a red and black line on one of the drive lines with a 10 ohm power resistor rated at 3 watts or more (might as well get a 10 watt so it won't get so hot), and DON'T use a halogen bulb; the whole point of a smart charger is to be able to leave it unatteded; an unattended halogen bulb is asking for a fire!

And don't open up the case of the PS, just cut off the unused wires , with the PS off, close to the case if you don't want them.

Howzat,
Joel

(in reply to RabidDragon)
       Post #: 11

converting comp power supply for Dymond Super Turbo - 8/20/2002 2:53:24 AM   
sgtladich



Posts: 29
Joined: 2/25/2002
Status: offline 		I'm talking about an ATX power supply. In order for you to turn it on you have to short 2 wires on the motherboard connecter. somone else said it was the green and black pair.

(in reply to RabidDragon)
       Post #: 12

converting comp power supply for Dymond Super Turbo - 11/10/2002 8:33:01 AM   
Brettrein


 

Posts: 10
Joined: 10/27/2002
From: Indiana
Status: offline 		I just tried all of these suggestions and it works great. I had an old NMB 460W P.S. laying around. It can supply a maximum of 18.0 Amps on the +12 volt line. I put a jumper on the green and black wires that are on the motherboard connector, to turn on the P.S. since it is an ATX. I didn't have any resistors laying around so I hooked up an old floppy drive to one of the connectors. Then I attached the Dymond ST to the +12 v line and everything worked! Hope this helps.

(in reply to RabidDragon)
       Post #: 13

PC Power supplies - 11/19/2002 7:19:36 AM   
gkrckid


 

Posts: 1
Joined: 11/19/2002
From: Wind Lake, WI
Status: offline 		To all

PC power supplies regulate all outputs based on the 5 volt supply. They all require at least some minimum load in order to stabilize the regulator, after that point all outputs will look much more respectable. Ideally, the best solution is to chage the divder resistors that control the setpoint for the 5volt output to move the output to 12 volts. It will then regulate on the output that your using to drive your accessory, plus this is the beefiest output on the supply. All these supplies use a TL494 type of regulator. If you look up specs for the chip, you can track down which pin is used to monitor the the 5 volt out via a resistor divider. Probably only need to change one resistor value to get this to happen.

Good Luck
GK

(in reply to RabidDragon)
       Post #: 14

Can I use a 12v bulb instead of the resistor? - 11/20/2002 5:29:42 AM