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How tu run miniVNA PRO in Linux Mint

MiniVNA PRO is a small Vector Network Analyzer with frequency range from 100 kHz to 200 MHz.

  • Download VNA/J to your folder.
  • Make it executable (chmod +x)
  • Run (see the following screen shot)

 

 

How to Install KiCad EDA with Libraries in Linux Mint

(Schematic and PCB editor)

Have you installed KiCad this way?

 

sudo add-apt-repository --yes ppa:js-reynaud/kicad-4
sudo apt-get update
sudo apt-get install kicad

Do you have the same issue? The following libraries were not found…

This should help: sudo apt-get install kicad-library

 

 

 

How to Install wxPython Phoenix in Linux Mint, Python 3.5

(GUI for Python)

I had to add these packages:

  • sudo apt-get install libgtk-3-dev
  • sudo apt-get install libwebkit-dev
  • sudo apt-get install libgstreamer-plugins-base0.10-dev 

As you can see in the following picture, this command worked for me:

sudo python3.5 -m pip install --trusted-host wxpython.org -v -U --pre -f http://wxpython.org/Phoenix/snapshot-builds/ wxPython_Phoenix

 

 

Good luck!

Bluetooth Handsfree and Inverted F antenna 

I bought a new hands-free from an online shop. Unfortunately, when I tried my first call with this device I found that the microphone is not working. I was thinking about returning the product but at the end I decided to try to fix that. As you can see in the following picture, the repair was straightforward. When I was fixing the polarity of the electret microphone, I found more interesting thing on the PCB - the invertered F antenna for bluetooth band (2.4 GHz) which is widely used in mobile devices. This particular antenna is connected to the source via coplanar waveguide with ground.

PCB  Iverted F Antenna