• Lessons in Linux contains lectures about the linux Operating System.

  • Maker’s Movement includes lectures on using Microcontroler boards like the Arduino and Raspberry Pi.

  • Tai Chi lists resources for the art of Tai Chi.

  • STEM introduces science and technology subjects to the curious with a smile.

  • Troubleshooting will focus on how to find and fix issues.

  • Theater Tech are lessons in the Technical Arts of Theater.

  • Solar Power to my home explains the solar panels on my roof and how they work.

  • Resume is my work history.

Lion’s Wing

Copyright © 2001 - 2022 John F. Moore

Lion’s Wing

Home of the Linux Lion



20 April 2022

Editing Words, Formatted and Tagged

Text documents, Word documents, PDF files, Markup documents, Markdown documents, Web pages, *.docx, *.html, *.odt, *.tex confused yet? On a computer we have multiple types of documents to express thoughts, ideas, or just letters. Lets look at some methods of marking documents.

Now that we know what types of documents we are creating, how can we use them in a wiki or a web browser.

16 February 2022

Raspberry Pi Web Server

Personal web servers are a great way to save manuals, interesting links, trip memories, and many other bits and pieces of information.

We are going to create a home Wiki using a Raspberry Pi and a USB hard disk. This will be a headless server, meaning that it can live anywhere it can connect to your network.


20 October 2021

What is IOT

IOT (Internet of Everything) and embedded system are taking over. How to understand, How to adapt, and are we ready.

3 June 2021

Tesla and the Electric Car

The electric car adoption has been greatly accelerated by a startup company named Tesla. This upstart car company, as of July 1, 2020, is the most valuable car company in the world, and has redefined electric cars.

But why is Tesla so popular? How is Tesla’s approach different from an internal combustion car? Isn’t an electric car just a different motor in a normal car? How does driving an electric car differ from driving an ICE (internal combustion engine) car? How is an electric car different or the same as an ICE car?

21 April 2021

House Repair

How often have you had a door stick? Or a cabinet drawer bind? Or a cabinet door not close properly? When it rains do you get water dripping off the window sill inside the house? How about those wooden chairs with the cross brace pulled out of the leg?

House maintenance is not all that difficult if you are willing to roll up your sleeves and do some work. We will look at some issues I have seen and discuss how to address them. Often you can find help by googling the problem.

17 February 2021

Plumbing Explained

How is your home/apartment plumbed? What to do when the sink is dripping all night? How to deal with a clogged drain. Let’s explore how to deal with these issues, and when to call a plumber.


16 December 2020

Electricity troubleshooting

What to do if a light does not light. What to do when your hair dryer will not turn on. How to map the circuits in your breaker panel. How to hook up a generator, if you don’t want to hire an electrician. How does a 208 volt circuit differ from a 120 volt circuit. Bring your electric questions to find answers.

21 October 2020

Electricity and Magnets

Where does electricity come from? How do we create it? What is the relationship between magnets and electricity? We will discuss how electricity get to our homes, and how they are wired. Lastly we will discuss the terminology for electricity.

15 April 2020

How Does a Computer Work? - Talking to the CPU

This is the third of three talks How Does a Computer work. This talk will discuss how to talk to the CPU

We are going to discuss types of instructions, methods of creating the instructions, as well as interrupts.

15 January 2020

How Does a Computer Work? - CPU

This is the second of three talks about How Does a Computer work. This talk will discuss the CPU.

For this talk we will focus on the computing engine in the computer.


16 October 2019

How Does a Computer Work? - Subsystems

This is the first of three talks about How Does a Computer work. This first talk will discuss the parts around the CPU.

We are going to discuss hardware and interfaces.

15 May 2019

Raspberry Pi GPIO Pins

The GPIO pins on the raspberry pi provide an interface to other hardware devices. Unlike the normal computer interfaces such as USB, Ethernet, or power, these pins can read and write hardware.

We will explore how to use the interfaces and then experiment with a couple of devices.

Finally we will explore a few other things you can do with a Raspberry Pi.

4 April 2019

What is an OS?

What is an OS, and why do we need one?

Most people are not aware that their computer has an OS, or they think Windows runs the computer. But they don’t realize that Windows is only the software that enables them to run their applications.

But is Windows the only choice for a personal computer?

I want to present some other options, and the reasons that Windows might not be your best or only choice.

14 February 2019

Setup and Maintenance of Linux on the Raspberry Pi part 2

Last meeting we setup the Raspberry Pi as a headless server. We discussed some of the commands needed to maintain the system.

Now we are going to discuss some of the background programs and configuration used by the operating system.

This will be a wide ranging talk about Linux on the Raspberry Pi.

See Old News for older news items.

Enjoy John F. Moore

Written by John F. Moore

Last Revised: Wed 20 Apr 2022 06:03:26 PM EDT

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