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Re: Where can I draw 5V for a fan ?

PostPosted: Wed Apr 09, 2014 11:59 am
by mgt6910
I've been sticking soldering irons where others fear to tread for some time !!
I've soldered directly to the 5V mounting hole plus a Grounded mounting hole.
If I did it again, I would not bother with a plug/socket pair on the cable, I don't intend to take it off !
I have glued a mini-fanto the top of the supplied cooler. Picture attached.

Re: Where can I draw 5V for a fan ?

PostPosted: Wed Apr 09, 2014 9:46 pm
by pgater
Hats off to your soldering skills! :D Much better than mine!

I will try the USB method first as the focus will be to get up and running, and then later maybe solder something in place.

I think that a connection for a fan is already on the mark 2 board wish list, which will be a good idea.

Regards,

Paul

Re: Where can I draw 5V for a fan ?

PostPosted: Tue Apr 29, 2014 5:10 pm
by awong209
9600 wrote:If you solder a very short piece of wire to connect the two pads of J15, this will route 5V to the mounting hole pad next to it. The other 3 mounting hole pads are permanently connected to ground. So you can then power a fan by picking up 5V and GND from mounting hole pads. I did this by putting M3 solder tags on the ends of the fan wires, and then placing these onto the pads, with hex nylon spacers on top and M3 nylon screws coming up from underneath.

I will be getting some pictures of this setup to make it easier for people to replicate!


Andrew, any update pictures so I know how to fan wire to the mounting hole? Thanks.

Adrian

Re: Where can I draw 5V for a fan ?

PostPosted: Tue Apr 29, 2014 5:18 pm
by 9600
Hi Adrian,

Please see Parallella Power Supply page.

Cheers,

Andrew

Re: Where can I draw 5V for a fan ?

PostPosted: Tue Apr 29, 2014 5:38 pm
by awong209
9600 wrote:Hi Adrian,

Please see Parallella Power Supply page.

Cheers,

Andrew


Actually found your post on Github, that was very helpful https://github.com/abopen/parallella-open-case

Re: Where can I draw 5V for a fan ?

PostPosted: Fri May 09, 2014 12:45 pm
by Davidmh
I am another person with low trust on his soldering skills. Would it be possible to plug a standard computer fan to the three pins next to the Ethernet?

I have tried to look up the specifications, but I was unable to find anything useful: it is either too technical for my knowledge, or I haven't find the right document.

Thanks! :)

Re: Where can I draw 5V for a fan ?

PostPosted: Fri May 09, 2014 3:55 pm
by FHuettig
Davidmh wrote:Would it be possible to plug a standard computer fan to the three pins next to the Ethernet?


While it's physically possible, it wouldn't help you :( The pins next to the ethernet connector are serial-port pins.

You bring up a good point that the Parallella reference manual needs an update.

-Fred

Re: Where can I draw 5V for a fan ?

PostPosted: Sun May 18, 2014 6:57 pm
by FHuettig
I would like to recommend hamster's technique of connecting the fan (or other off-board use of 5V) directly to the through-hole pins from the DC barrel connector. Slightly less scary than soldering other places, and being through-hole they will have good mechanical strength. -Fred

Re: Where can I draw 5V for a fan ?

PostPosted: Tue May 20, 2014 12:07 pm
by gceline
Behind the power connector is a three pin jumper - the jumper between pins 1 & 2 is carrying power.
So if you find a two pin cable and cut and short the two cables, then you have a 5VDC lead you can connect and use that to get 5VDC without soldering on the board. I do recommend soldering the connection to ensure good conductivity as this is the main power input to the board.

The three pin jumper next to the Ethernet is serial, but Pin 3 (outside most pin) is GND

Re: Where can I draw 5V for a fan ?

PostPosted: Sun May 07, 2017 12:50 pm
by pirithiumx
What does J15 do? I have not fired up my board yet. Planning before power (heatsink fan etc) noticed 2.54mm header pins on J15. But cant seem to find a board layout schem yet. Read briefly that these are for 5vdc?