RunRyder RC
 3  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1728 views POST REPLY
Scorpion Power Scorpion Power
HelicopterMain Discussion › power supply question.
11-26-2007 07:26 PM  9 years agoPost 1
uk2bx

rrApprentice

Bronx , NY

My Posts: All  Forum  Topic

Hi guys
I was reading some old posts about taking the 12v power supply out of a p/c , and as i have a p/c im throwing out i have decided to take out the power supply and modify it for a power supply for my battery charger. Reading the markings on the power supply i have found it has a 5v and a 12v supply , has anyone used the 5v supply to power thier helis for bench set up to save using the battery pack? I'm going to give it a try. Let me know if you think this is a bad idea.

thanks Jamie.

www.flysrw.com

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-26-2007 07:34 PM  9 years agoPost 2
uk2bx

rrApprentice

Bronx , NY

My Posts: All  Forum  Topic

Here is a link about the conversion , left side of page at the bottom. http://www.rcbatteryclinic.com/

www.flysrw.com

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-26-2007 07:56 PM  9 years agoPost 3
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

hi
there was a link about it here somewhere , i have tried it and it works fine , on a nitro or gasser heli , with an electric i would unplug the ESC from the RX and not have the flight pack attached ( probably goes without saying ), HTH , dana

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2007 08:04 PM  9 years agoPost 4
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

here's the link i was trying to remember

http://www.runryder.com/helicopter/t310705p1/

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2007 08:37 PM  9 years agoPost 5
TerranAce007

rrVeteran

Austin, TX

My Posts: All  Forum  Topic

Just did this myself on two different PSU's I got from old computers. Works quite well. Just remember to unplug it while tinkering, or you will get an unpleasant surprise...

When I get home from work I will post some pictures...

EDIT: One thing to consider is the amperage rating on the power supply. It may be able to put out 12V, but depending on your charging equipment, a really old PSU might not have enough juice. The one I started with did 12V/8A, which is plenty for everything but the big LiPo's.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2007 10:33 PM  9 years agoPost 6
uk2bx

rrApprentice

Bronx , NY

My Posts: All  Forum  Topic

Thanks for the info guys , the power supply is rated at 12v 10a so all should be ok...Jamie.

www.flysrw.com

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-26-2007 11:36 PM  9 years agoPost 7
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

hi Jamie
i was thinking you would be using the 5 volt side , right into your RX , but it sounds like it might be the 12 volt side into a BEC? , some of the PS's i have used needed a load on the 5 volt leg in order to supply voltage to the 12 volt side , dana

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 12:00 AM  9 years agoPost 8
Raptor3DPilot

rrKey Veteran

North Las Vegas, NV

My Posts: All  Forum  Topic

I did the conversion a while back on my power supply and it worked great! I didn't take the time to put out the 5v leads, but I left them long enough to add to the outside of the case if I wanted to. I've definitely enjoyed being able to charge my Tx/Rx in the house rather than using the car batt everytime.

If you need any pictures or help just ask. One warning though, be careful when drilling the holes for the adapters, on my first conversion the drill bit jumped and went right into a capacitor! oops... screwed that one up.

Remember when flying inverted that down is up and up is EXPENSIVE!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 12:06 AM  9 years agoPost 9
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

here are some links that cover it too
http://www.google.com/search?hl=en&...er+power+supply

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 02:54 AM  9 years agoPost 10
TerranAce007

rrVeteran

Austin, TX

My Posts: All  Forum  Topic

Here is my first attempt. Nothing special, but it works great. The PSU has short protection, so if you touch the leads by accident, it shuts off automatically.

Since the first PSU was only rated at 6A, I pulled a newer one out of a busted computer and made myself a field charge box over Thanksgiving break. It was cold and rainy for the whole weekend and I was rather bored...

This was a newer PCI Xpress PSU, so it had dual 12V rails. The CPU output is 12V/12A and the normal is 12V/8A, so it has plenty of power. I attached the 5V leads incase I need them for anything. I also zip-tied a 12V Pb battery in the box in case I can't find any AC power:

Parts are very cheap. You will need a switch ($5 at most), some 1-10 Ohm resistors (.99 each), a soldering iron, and some banana plugs or other type of terminal ($7 for a pack of banana plugs). Heat shrink tubing is useful to have as well.

These pages were very useful:
http://www.wikihow.com/Convert-a-Co...ab-Power-Supply
http://www.rcbatteryclinic.com/

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 03:11 AM  9 years agoPost 11
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

Just be careful as a power supply does contain lethal voltages inside.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 04:38 AM  9 years agoPost 12
TerranAce007

rrVeteran

Austin, TX

My Posts: All  Forum  Topic

They also have short protection circuitry so they cut off when something isn't connected right. I accidentally touched something that wasn't grounded while connecting my switch and got a nice jolt through my hand, but nothing near lethal. Moral of the story though is be careful

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:31 AM  9 years agoPost 13
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

Actually, the moral of the story is to use a purpose built power supply and be done with it

  

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:00 PM  9 years agoPost 14
TerranAce007

rrVeteran

Austin, TX

My Posts: All  Forum  Topic

Maybe, but it's not as satisfying as a good DIY project...

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:12 PM  9 years agoPost 15
SSN Pru

rrElite Veteran

Taxachusetts

My Posts: All  Forum  Topic

has anyone used the 5v supply to power thier helis for bench set up to save using the battery pack? I'm going to give it a try. Let me know if you think this is a bad idea.
Yep, I tapped the 12 and 5V lines on mine for setup and charger supply. works great and you never have to worry about your receiver battery going dead.

Stupidity can be cured. Ignorance is for life!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:24 PM  9 years agoPost 16
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

Maybe, but it's not as satisfying as a good DIY project...
Yes, but a DIY project is usually never as good as the real thing anyway.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:30 PM  9 years agoPost 17
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

hi
the PC supply i used needed a load on the 5 volt leg to work , and what i did was to make up an adaptor , for lack of a better term , that plugs into a stock PC supply , and loads the 5 volt leg and give the two banana plugs for my charger , i cost me about $10.00 at the shack , here's a photo , i've been using it for about four years , gives me nice clean 12 volts at up to about 5 amps , dana

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:35 PM  9 years agoPost 18
Dr.Don

rrVeteran

Cedar Park, TX -- USA

My Posts: All  Forum  Topic

You do have to load the 5v supply to get a good regulated 12v. I used an automotive light bulb permanently wired into the 5v supply to supply a load. Works great for several years now.

Dr.Don

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 05:43 PM  9 years agoPost 19
copperclad

rrElite Veteran

NY

My Posts: All  Forum  Topic

hi 2atlo8
yes , some you have to load , and some others will work fine without the load ( you just need to hook two wires together ) , i found with mine that the 5 volt leg needed a good load on it to be able to get the rated current from the 12 volt side , and automotive light bulbs like you used are a great way to add the load , if you run them in parallel you can increase the load , i had a friend that used to use a regular 60 watt household bulb for a high wattage resistor , dana

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 06:35 PM  9 years agoPost 20
TerranAce007

rrVeteran

Austin, TX

My Posts: All  Forum  Topic

I used two 2 ohm, 10W resistors over the 5V line for the load, but a light would work too. The switch I used has a 12V lamp built in, so I figured I didn't need another light.

The link I posted has a detailed how-to which is fairly easy to follow. In summary though, here is what you need to do:

1. Connect a red wire to the gray wire. This is the power check circuit and must be closed for anything to work

2. Connect the green wire and a black wire to a switch. This is the on/off circuit.

3. Connect a red and a black wire to some sort of load as mentioned above. This loads the 5V circuit to make the 12V put out its rated power.

4. Use a yellow and black wire and your choice of connectors for the 12V power source, and a red and black wire for the 5V source. The orange is 3.3V if you need that for anything. I don't remember the colors, but there are -5V and -12V volt lines as well, which can be used to created various other voltages (10V, -7V, 7V, and 24V) but those are usually rated at about .5A or less.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1728 views POST REPLY
Scorpion Power Scorpion Power
HelicopterMain Discussion › power supply question.
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, October 24 - 3:22 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online