[hpsdr] Fan pins on HPSDR LPU

[Scott Cowling]

Hi Joe,

Yes, you are correct. U3 is the 12V regulator, not U2.

Sorry about the mistake...

73,
Scotty WA2DFI


At 15:17 2010-06-15 -0400, K1rqg at aol.com wrote:
>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
> >
> >
> >
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