Wednesday, February 5, 2020

Basic Setup with the LimeSDR Mini and Ubuntu 18.04 Bionic

To get the LimeSDR Mini working with Ubuntu 18.04 follow the following:
https://github.com/pothosware/PothosCore/wiki/Ubuntu

To get LimeSDR Mini working with GNU Radio Companion, also add:
https://github.com/myriadrf/gr-limesdr

But does the LimeSDR Mini work with GQRX?? Try SDRAngel.
https://discourse.myriadrf.org/t/limesdr-mini-gqrx/4537

Other Useful links:
https://github.com/pothosware/SoapySDR/wiki#installation

Friday, January 31, 2020

Setting up Andy's Linux

Steps taken to set up Andy's Linux:

https://sourceforge.net/projects/kb1oiq-andysham/

1) Download ISO.
2) Use unetbootin to "burn" it to a USB stick
3) Configure in the Bios to boot from USB (by pressing F7, and then the correct menu option)
4) Install to the Hard Drive.
5) Get the internet working through a netplan configuration file:
/etc/netplan/01-network-manager-all.yaml
5.1) Contents:

#Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    ens33:
     dhcp4: yes

Adding programs to the icewm start menu:

$ icewm --directories

gives:

/etc/X11/icewm

edit the programs folder in vim as root.

========

How to create a keyboard shortcut for Printing the Screen with Andy's Linux, Ubuntu 18.04:

Look at the file /usr/share/icewm/keys. It is a goldmine of information.

From this file I derive that /usr/include/X11/keysymdef.h is the file that contains all the key names with corresponding
hex values. The ones involving printing can be found with:
cat /usr/include/X11/keysymdef.h | grep "Print"

I get the output:

#define XK_Print                         0xff61
#define XK_3270_PrintScreen              0xfd1d


I can cross check this with the xev command. When I press the PrtSrc button with xev running I get:

"(keysym 0xff61, Print)" amongst the output.


1) Using this information, I can create a file in /usr/local/bin/ called script-screenshot.sh .

#!/bin/bash

DATE=`date +%s`
scrot "$HOME/Pictures/scr-$DATE.png"

2) Make script-screenshot.sh executable:

chmod +x /usr/local/bin/script-screenshot.sh

3) Create a file named "keys" in /etc/X11/icewm with the contents:

key "Print"   /usr/local/bin/script-screenshot.sh

Reference:: https://bbs.archlinux.org/viewtopic.php?id=135172

Sunday, September 15, 2019

notes about rhocentralfoam

https://www.openfoam.com/documentation/tutorial-guide/tutorialse6.php

https://curiosityfluids.com/2016/04/01/pressure-driven-nozzle-flow-with-shock-rhocentralfoam/

Saturday, September 14, 2019

Grids for Use with Open Foam

Grids for OpenFoam

Creating Grids with BlockMesh:


How to create a grid with blockMesh in OpenFOAM - tutorial

Creating a Grid with GMSH:

https://openfoamwiki.net/index.php/2D_Mesh_Tutorial_using_GMSH

Gmsh Tutorial Part 1 - Fundamentals and 2-D Meshing

https://www.youtube.com/watch?v=xL2LmDsDLYw

Gmsh Tutorial Part 2 - 3-D Meshing

https://www.youtube.com/watch?v=laKHzos3EbU

Gmsh Tutorial Part 3 - Scripting and Controlling Mesh Resolution

https://www.youtube.com/watch?v=laKHzos3EbU

Monday, May 27, 2019

Constructing a Face

Constructing mesh with non-default patches of size:
    inletFace    11
    inletWall    194
    inletsourceFace    1067
    inletdestinationFace    1067
    fineMeshWall    89
    fineMeshSourceFace    50000
    fineMeshdestinationFace    50000
    fineMeshSymmetryWall    500
    fineMeshOutletLeft    500
    fineMeshOutletBottom    100

Adding cell and face zones
 Face Zone fineMeshInlet     11
 Face Zone inletboundaries     11

Friday, May 10, 2019

Blinking in Unison

Both the Eggtimer LCD and Eggtimer RX blink in unison with the Eggfinder Mini, but I am stuck with "Waiting for Fix" with the Eggtimer LCD and data that looks like

http://raptorlicious.blogspot.com/2018/12/nmea-data.html

for the Eggtimer RX.

Monday, May 6, 2019

Holo Host Investigation

Looking at Holo Host Stuff:

https://nixos.org/releases/nix/nix-0.5/manual/manual.html

https://github.com/Holo-Host/holoportos