Simple multi-meters probably will not give you an accurate AC reading (in AC mode) when checking the DC side of a rectification circuit.  You really need to use an oscilloscope.

A Quick Hi to let everyone know I am still here and still playing with all the usual stuff.

Software, Electronics, Music, Outdoors/Camping, Kayaking, Traveling / Exploring and just having FUN!

It did not work because I could not disable intel video chipset in my uefi bios. :(

UPDATE to F30. and Fixed acpi (see grub commandine below)

NVidia driver issues still persist, but I finally debugged (and disabled) acpi consistent errors that had be plaguing me in F27.

I added a kernel boot param to my Grub2 commandline.

• acpi=off

The default window titlebars in Gnome on Fedora 26 ar too fat (thick), so I wanted to reduce their size.

They are config'd in the Themes (/usr/share/Themes or ~/.themes) gtk.css
OR
in a CSS file in ~/.config/gtk-3.0/gtk.css

I have a Jura Z6 Super Automatic Espresso/coffee maker.

Recently I noticed it was NOT making a nice smooth stream of milk foam when previously it had been.  It now was splattering all around the cup and not making much milk foam froth.

I fixed it.

Have you ever wanted to create a JAR file for your Java class but only wanted to collect and jar the class files required by your class?
I found a very useful class to do this for you:
It is called: ZipLock written by Stuart D. Gathman at his company Business Management Systems.

Direct link to Original ZipLock.java file.
Its perfectly simple and OpenSource!  Thanks Stuart.

I also wrote a simple bash script below to wrap the calling of the java class...

Neutron Music Player Song Ratings: I needed to transfer all the 1000s of song ratings from an old android pad to a new one. I figured out how to access and restore the song ratings in the Neutron music player (Android) SQLite database.

See the SQL, database tables and how I did it.

I want to control a LED light Strip with the 5 channel (rgbw) LEDNet controller that I bought.  I want to use my own software. Thankfully others have figured out the IP messaging packet, so I wrote my own little app that lets me program/control a Strip of RGBw LEDs.

The ultimate intent is to be able to control it using My UDI ISY-994 home controller.

I needed a simple Java Servlet to zip a directory of files (or a single file) with parameters to dynamically specify what to zip up.

It does NOT create a temp file; it zips and streams the output directly to the client.
its called ZipFiles.

Here it is...

I have started to get some useful sample/examples completed on my Raspberry Pi2. Here is the Schematic and Java code to control an RGB LED.

I also have examples for:

• controlling multiple GPIO pins with external transistor driven LEDs and Java Pi4J code that times their cycling.
• Pulse Width Modulation (PWM) control of GPIO pins and an RGP LED.

 These will be discussed in other posts.

A quick one liner (using PulseAudio) to rip the audio being output to your linux desktop speakers and convert it to Vorbis Ogg file.

Using pacat...

[FIXED] The Gnome Bluetooth GUI via settings FAILS to pair with my HP Bluetooth Laser Mobile Mouse. This has not worked in the gui bluetooth settings app for a few versions (maybe F19).The problem is that the mouse does NOT have a pair code, and the it won't pair with '0000' or '1234'.

I figured out to manually pair it from the commandline without a pairing code!

use bluetoothctl on the commandline

use the following commands to connect to the MAC address...

The latest rpm for google-earth is failing to install because a conflict with /usr/bin.

an easy re-build of the RPM fixed it... instructions here: http://forums.fedoraforum.org/showpost.php?p=1650497&postcount=27

then sudo yum localinstall /home/tgutwin/rpmbuild/RPMS/x86_64/google-earth-stable-7.1.4.1529-0.x86_64.rpm

It is now installed in /opt/google/earth/free/google-earth

FIXED!

Now that I have my Raspberry Pi2 working with Java, I need to draw up some schematics....

Here is how I downloaded & installed the latest Git version of XCircuit on my Fedora 21 workstation.

It includes all the Fedora Yum  RPM packages I had to install to get it to build from source - you might need others.