Re: Fans, Pi4, and the DRAWS case
Kevin K. - N7KJK
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Not sure this is what you're looking for. I've created something here for my two DRAWS implementations.
One is a PI 3 running an RMS Gateway. The other is a PI 4 that I am going to use for APRS tracking and beacon.
The image is kind of at a weird angle because I wanted to show the DRAWS connections, the PI 4 connections, and one of the FANs.. (yes dual fan.. spared no expense. :)
I purchase two of the stacked acrylic PI case kits for each project (about $15 each with fan, no power supply).
I added a separator to the GPIO so that the DRAWs stands away from the PI but almost a full inch. This allows me to put all the heat syncs on the PI. Put a fan just above the PI, connect the DRAWS and put a second fan above it (visible in the picture). It takes some patients, and a little skill with a dremel tool. I just customized the layers of the second case as I assembled it to accommodate the DRAWS. Then I go buy some longer screws to bolt it all together. The modifications, and various openings in the layers allow for sufficient air flow.
I also made a watch battery replacement connector out of a thumb tack, and washer, so that I could set up a pair of AAA batteries to the DRAWS clock (I didn't want to risk soldering on the DRAWS).
Both systems seem to be working just fine. I connect the two fans to the 5 V offered on Pins 1 and 8 on that connector next to the power input. NOTE: I'm using two .10 amp fans to stay under the limit of the 5 v power which is .25 (250mA).
Hope this gives you something to consider.
On Sun, Sep 13, 2020 at 11:24 AM Tim Huffaker <thuffaker@...> wrote: