AMRAD suggested microcontroller projects

Tue May 14 18:29:30 CDT 2013

Interesting to note relating to the second item, www.HamRadioNow.tv just highlighted a new product regarding station automation and control.  See:
http://www.udcsys.com/hamShackSwitchSTNCTRL.html

I’m sure that this could easily be done with an Arduino as well (grin).
73, Terry, WB4JFI

From: Jeff Scaparra 
Sent: Monday, May 13, 2013 10:47 PM
To: Karl W4KRL 
Cc: tacos AMRAD 
Subject: Re: AMRAD suggested microcontroller projects

Two projects that I want to work on that I would find interesting are: 

Using Rasp PI/Arduino to control a stepper motor for remotely tuning a small magnetic antenna so that after calibration it could use information from the radio to always be in tune with no user intervention. This would mitigate the number one problem of using a small transmitting loop. That is small bandwidth and the constant need to adjust tuning. I don't believe this is super novel but I am interested in it none the less. 

I want to build a switching station that can switch all of my radios (and future radios) with filter banks, preamps, other radios and antennas. I got this idea over the last weekend durring the Armed Forces MARS/HAM test thing. For the digital work I had my antenna fed into a mini-curcuits pre-amp which fed the rx side of a USRP with the LFRX daughter board. From there I took 1 MHz of complex IQ samples to my computer where I displayed an FFT and waterfall, recorded to disk for replay and analysis later, and finally sent the samples back out to the TX side of the USRP for transmitting  That then went to my KX3 so that I could use that radio to tune around the band (within that 1 MHz on 40 meters) and hear what was going on. It was very neat but I had no way to transmit with this set up. The ability to switch all of these things on the fly quickly with a computer controlled interface would be amazing. 

73 Jeff N6SDR

On Mon, May 13, 2013 at 3:13 PM, Karl W4KRL <W4KRL at arrl.net> wrote:

  Tacoistas,

  I just posted a list of possible Arduino or other microcontroller projects to the AMRAD website. Please send me your suggestions to add to the list and any details about microcontroller projects you are working on.

  http://amrad.org/projects/sbc/?updated

  73 Karl W4KRL

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