[App_rpt-users] Fan control?

[Scott Zimmerman]

Stephen,

As others have commented, to help keep the price down and the footprint small, the GPIO of the CM119 
were not brought out to pads on the RIM_Lite family of products.

The exception to this is on the Maxtrac version where I/O 5-8 were brought out to buffer/inversion 
transistors that are meant to be used for channel steering on those radios. These pins can be 
re-mapped and used for other purposes if channel steering is not being utilized.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
474 Barnett Road
Boswell, PA 15531
On 6/21/2016 7:24 AM, Stephen - K1LNX wrote:
> Hi guys,
>     I'm running a pair of UHF CDM1550's in full duplex with one of the new Repeater Builder Rim
> "lite" RM interfaces:
>
> http://www.repeater-builder.com/products/usb-rim-lite.html
>
> It does not look like I can tap the GPIO's very easily on these boards, nor can I tell if GPIO 5-8
> is available for general use looking at the schematic:
>
> http://www.repeater-builder.com/products/pdfs/RB_RIM_Max.pdf
>
> What I'd like to do is drive a relay board to switch a fan on if the receiver is active or there is
> traffic coming in to the node, being connected to another station or hub for example. I read over
> the GPIO and event management subsystem documentation, and it looks like that's what I need, but I
> don't have a parallel port nor can I tap the GPIO's on my interface easily (or even know if they can
> be used as per the above).
>
> Looking for ideas here if anyone else has encountered this, would prefer the logic/relay board
> approach vs. say a temperature controlled switch on the heatsink or something.
>
> 73
> Stephen
> K1LNX
>
>
>
>
>
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