[hpsdr] Fan pins on HPSDR LPU

[K1rqg at aol.com]

Scotty
 
 
Did you mean U3 instead of U2?  My schematic shows U2 as the 5 V  regulator 
and
U3 as the 12 V regulator?
 
73 de Joe
K1RQG
 
 
In a message dated 6/15/2010 3:02:55 P.M. Eastern Daylight Time,  
scotty at tonks.com writes:

*****  High Performance Software Defined Radio Discussion List *****

Hi  Jack,

J10 appears on the schematic just below F1 in the upper left  corner.

Here is a link to the production  schematic:
http://openhpsdr.org/support/LPU/lpu_B.pdf

In order to  get voltage  to the fan connector, you must short across 
F1, which is  a DNI part (normally only used if you install the 
optional 3.3V regulator  parts).

So just solder a resistor lead across F1 and you will have  power to your 
fan.

The fan is supplied with your DC input voltage, so  it will be 
somewhat higher that 12.0V (typically 13.8V).  If you need  12.0V 
maximum, you will have to jumper J10 pin 2 over to U2 pin 2 (and  
leave off the jumper across F1).  This will load your 12V regulator  
with the fan current, so make sure you keep within the 2A maximum rating  
of U2.

73,
Scotty WA2DFI



At 12:40 2010-06-15 -0400,  Jack Speer wrote:
>***** High Performance Software Defined Radio  Discussion List *****
>
>I want to install a 3 pin Artic Cooler  Pro TC, 92mm fan which has a 
>temperature sensor on a cable into the  HPSDR Pandora  enclosure.
>
><http://www.arctic-cooling.com/catalog/images/ARCTIC_F_Pro_TC_press_release
_Eng.pdf>http://www.arctic-cooling.com/catalog/images/ARCTIC_F_Pro_TC_press_
release_Eng.pdf  
>
>
>I have planned on using the LPU, 3 pin polarized  connector I placed 
>on the LPU board per instructions (I don't see the  J10 pins on the 
schematic).
>
>The pins do not appear to have any  voltage.  The fan requires 6-12 v to 
run.
>
>Help  please.
>
>Jack,  N1BIC
>
>
>
>_______________________________________________
>HPSDR  Discussion List
>To post msg: hpsdr at openhpsdr.org
>Subscription  help: 
http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
>HPSDR  web page: http://openhpsdr.org
>Archives:  http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/


_______________________________________________
HPSDR  Discussion List
To post msg: hpsdr at openhpsdr.org
Subscription help:  
http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
HPSDR web page:  http://openhpsdr.org
Archives:  http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20100615/048d8103/attachment-0003.htm>