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QDX Go Box Build

 

Figured I'd share this with my friends.? I put together a box with an old 15" laptop monitor in the lid, 16 amphour lifepo4 battery w/30amp bms, raspberry pi zero 2 w w/fan and USB hat, impulse electronics solar charge controller, various cables with power pole connectors, etc. I also included a Xiegu G1m for SSB and CW(gotta keep practicing the code).? Still needs a little spit and polish, but I think it's coming together! Tell me what you guys think ?
73 Brad W9BLH
 

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Nice! ?Does the Pi Zero have enough horsepower? ?Looks like it ought to run a long time,

73, Willie N1JBJ


On Apr 1, 2022, at 7:24 PM, Brad Hansen <bhansen150@...> wrote:

Figured I'd share this with my friends.? I put together a box with an old 15" laptop monitor in the lid, 16 amphour lifepo4 battery w/30amp bms, raspberry pi zero 2 w w/fan and USB hat, impulse electronics solar charge controller, various cables with power pole connectors, etc. I also included a Xiegu G1m for SSB and CW(gotta keep practicing the code).? Still needs a little spit and polish, but I think it's coming together! Tell me what you guys think ?
73 Brad W9BLH
_
 

The zero runs JS8CALL very well, but I haven't tried any other digi modes yet?
 

Looks nice Brad, can you tell us the model number for your display so I can check out the resolution? Also, how do you drop the voltage from the battery voltage to the RPi?

Thanks, Gene, K5PA
 

Hello Gene,
? ?I'll have to disassemble the screen in order to get the model number, give me a bit and I'll?get back to you. As far as powering the Zero, I use a buck converter/powerpole cable that I made.? Same goes for the QDX which I built for 9 volts. I tried to keep everything "modular" as much?as possible. I'll actually use a tablet with VNC versus using the 15" screen unless I'm able to actively charge with solar or station power, as it is quite power hungry.
 

On Sat, Apr 2, 2022 at 06:23 AM, Brad Hansen wrote:
Hello Gene,
? ?I'll have to disassemble the screen in order to get the model number, give me a bit and I'll?get back to you. As far as powering the Zero, I use a buck converter/powerpole cable that I made.? Same goes for the QDX which I built for 9 volts. I tried to keep everything "modular" as much?as possible. I'll actually use a tablet with VNC versus using the 15" screen unless I'm able to actively charge with solar or station power, as it is quite power hungry.

??"I use a buck converter/powerpole cable that I made. "? I have been looking at doing that as well..? could you share more of that info?

I also used a laptop screen in a dry box for uBITX and raspberry pi..? I bought a hdmi control based on info on the back of the laptop screen through Amazon.. works pretty good.??
 

Here is the USB buck converter I use, seems pretty stable(top picture).

Here is the buck converter I used for QDX, needs adjustment for 9 volt output. Needs a load on it during adjustment to be accurate (middle picture).
 

When you adjust the voltage on the buck converter, at what load do you set the voltage, since there is such a swing between Rx and Tx load. I am very skeptical of using buck converters because there is essentially no voltage regulation, especially when there is > 15x load swing between Rx and Tx.,

73 de k1jbd
bammi
 

As I don't possess the greatest test equipment, I used resistance to set 9.1 volt at 2 amp load as seen on my buddipole power mini.? Surprising as it may sound, voltage remains very consistent and I haven't let angry smoke out of the QDX yet.

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