Job 3 – Plasma Cutter – Attempted

Customer brought in a plasma cutter that had popped when first powered on then did not power on after that.

I fixed the obviously-damaged arc drive lug, but the device still didn’t power on. It was not worth troubleshooting the rest of the device at the time as it is difficult to disassemble. No charge to the customer, but I probably should have checked the primary power section of the cutter first.

I didn’t take a picture of the final solder

The customer still has it. I may try troubleshooting again sometime …

Data Recovery – Attempted

A customer brought in a hard drive hoping to recover the data. The data wasn’t worth paying a laboratory so she brought it to me for an attempt.

I was not able to recover the data, but I was able to diagnose the problem so for no charge she got the peace of mind of knowing the data was gone forever. The platter was badly scratched. I called the lab and they told me they couldn’t recover the data even for $100,000! Impossible?

Megatouch – Fixed

A customer brought in a Megatouch (bar solitaire touch screen arcade game, see photo) in which he had replaced the permanent-memory battery and it would not power on.

I verified the battery charge level, configured the CMOS settings properly and returned it to him with brief “step-by-step” showing how to factory reset in the future.

Thanks for bringing it in!

Data Recovery

If I cannot recover your data, you don’t pay anything.

If I can recover your data, $50 charge for it and I give you a download link if the data is not sensitive, or a thumb drive if your data is sensitive. I make some quick attempts and may be able to recommend something.

The next option would be a laboratory. I can diagnose and try to give you some idea of your chances if you send your media to a laboratory.

If your data is worth $500+, I recommend Data Recovery Labs. They have a “no data, no charge” guarantee.

Last resort, I can open the drive and make an attempt. Opening a hard drive does not usually cause damage that would prevent a laboratory from recovering data if you decide to send it, but it can increase the recovery cost and the laboratory will know if the drive has been opened.

Internet from Bottom to Top: What is it?

Physical Computers in Physical Buildings on Physical Real Estate: Server Warehouses

Examples: AWS, …

With terms like “internet” “internets” and “cloud” it is easy to forget that there has to be something physical somewhere.

Amazon Web Services is currently the largest server owner in the world. They have huge locations around the world. You may have never actually seen one of these buildings. They are extremely high-security, so much so that they are often built in rural locations. While they cannot be completely incognito, their specific physical locations are not advertised. Physical access to these buildings is strictly controlled.

A server is just a computer with a specific purpose: to “serve” websites. Server warehouses are really just giant computer labs with rows and rows of man-sized computers (called servers), but the human users are remote. Anytime you are on the internet, you are trading information from a computer in a large server building.

Server Operating System

Examples: Linux, …

Personal computers typically run Windows or whatever Apple’s OS is called. Some geeks use Linux at home. Servers almost always use Linux as their operating system.

Physical Cables

Examples: underwater fiber-optic cables, …

Forget satellites and over-the-air smartphone data. Data transmission requires energy and transmitting data through the air is extremely inefficient. Satellite internet will never take over and the 5G on your phone goes through a fiber-optic cable all the way to the base of the cell phone tower. Intercontinental data transmission is done by underwater bundles of fiber optic cable, not satellite and not magic.

By now you have probably seem workers installing underground fiber-optic cables. They go under roads and through neighborhoods.

Physically Connecting the Cables: Routers and Core Routers

Examples: these are not common to know about or see.

Core routers are a lot like servers in that they require extremely high security. They are also typically located outside of cities but they have to be near cities, for example in the suburbs, to do their job. Core routers also look like servers. They are man-sized. Core routers have hundreds of fiber cables plugged into them. Cisco Systems is the most famous manufacturer of core routers.

There are various smaller routers throughout cities. They might be located, for example, in the small utility buildings under cell phone towers.

Routing Software Directing the Traffic: TCP/IP

Internet Protocol is the language the hardware uses to communicate to each other how to send information over the cables and routers that make up the internet. IPv4 was the original and is still dominant. IPv6 began deployment on the public internet in 2006.

Web Browser to Server in a Warehouse: Physically Finding a Website

When you type a web address into your browser, your computer takes several steps to be connected to the appropriate server that delivers the website information.

The first source of information is the Internet Corporation for Assigned Names and Numbers. ICANN keeps the official list of who owns what site and therefore the owner of the site has the right to define where the traffic going to a domain name is directed. ICANN is the “global phone book” of the internet. Your web browser sends an internet address request to ICANN and ICANN responds with Name Servers. The Name Servers are servers maintained by a large hosting company to manage all of the websites hosted on their many servers. Name servers are like the “local operator” who further directs your call based on your request. Each request contains all the required information for the entities to respond with further routing instructions. As a website manager, you set your Name Servers through your host who forwards them to ICANN and it can take a few hours to “propagate” because it is a global system.

The lowest readable level of an address is an IP address, for example 108.174.197.50 . The IP address is used by all of the physical hardware from cables to routers to servers to physically make the connection and transfer information between the correct two computers, usually a personal computer or phone to a server.

Computers Talking

To continue clearly, we will specify the two definitions of “server.” “Physical server” is the physical man-sized computer mentioned above. Each physical server can “serve” hundreds or thousands of different websites to thousands of users simultaneously. Often, the physical servers are internally compartmentalized into “virtual servers.” Each virtual server can be maintained by an individual user, managed remotely, and rented from the physical server who performs the service for hundreds of “virtual server” renters. The virtual server renters collectively pay for the physical server they never see. So a virtual server is a physical server or at least contained on a physical server.

Once your web browser is connected to the name server, the name server uses Domain Name System to further direct the traffic. Example DNS record entries are “A Record” and “CNAME” for example. These are maintained by the hosting company. They do not take long to “propagate.”

Via physical cables and routers to ICANN to name servers to the hosting company to DNS records to the individually-managed server, there are now two computers talking to each other. We have arrived at the software level. The personal computer web browser software speaks to Apache on the server running Linux. There is one more type of traffic direction, the 301 and 302 redirect. In Apache, the redirect is usually located in the .htaccess file. The .htaccess file gives all visitors higher access to the server and so is therefore not enabled by default.

Apache2

Like your own computer, the operating system doesn’t do much by itself. Linux on a server by itself cannot “serve” a website. There has to be software to receive a request for a website over a cable and send the appropriate data to internet users. The most common server software is called Apache. So a server manager installs Apache on the server using Linux commands and then the websites are installed on Apache and served through Apache

  • upload files to var/www/html/site-name
  • create site-name.conf file in etc/apache2/sites-available
  • enable the site with sudo a2ensite site-name
  • reload apache2 with systemctl reload apache2

 

  • What a “host” is
    • The one we will use is bluehost.com
    • The host stores the files for your website and sends it to users when someone goes to your site. Bluehost costs ~$12 per year to maintain the site
    • Pick your domain name
    • Others are godaddy.com, www.ipage.com, …
  • What a web design platform is
    • WordPress is the one we will use, available at www.wordpress.org
    • Removes the necessity to work with actual code, like HTML, CSS, JavaScript, PHP
    • Others are squarespace, tumblr
  • What a theme is
    • “theme” = “template
    • I use Twenty Eleven for my store. It’s very simple and you can customize all the colors and have a heading image.
  • How to present items for sale
    • WooCommerce is the plugin that we will use.
    • What do you want to sell?
  • Make your site searchable on google and other search engines:
    • Search Engine Optimization” (SEO) is the name for this
    • WordPress SEO is the plugin we will use.
    • What words do you want to be searchable on your site?
    • You can customize how your site looks when somebody searches it, particularly on Google
  • How to measure, categorize and track the traffic to your website
    • Google Analytics, set up a free account
    • Plug-In: Google Analytics for WordPress, makes implementation easy
    • Important to be able to profile your customers
    • The traffic you generate may become valuable to advertisers and you can sell to them
  • Make a separate website for free using a subdomain
    • You already own the main domain, adding subdomains is free.
    • It doesn’t take customers completely off your site.
    • For example, you can make store.yourdomain.com be the place where you actually sell products and it can be separate from where you advertise and describe the products.
  • Set up e-mail at your own domain name, and send and receive e-mails using your existing webmail.
  • How to receive somebody’s money
    • PayPal
    • Amazon is another option.

 

https://www.whoishostingthis.com/blog/2014/02/11/six-organizations-that-run-internet/

 

Other Remarkable Clocks

The Antikythera Mechanism

an Astronomical clock from ~100 – 200 BC found in a shipwreck near the island of Antikythera.

On Wikipedia

On YouTube

Optical Lattice Atomic Clocks

Proposed in 2001 by University of Tokyo Professor Hidetoshi Katori, these are very much more accurate than standard atomic clocks. They are accurate enough to measure relativity and geologic density. Experimentally demonstrated in 2005.

Jun Ye, Boulder Colorado Strontium Optical Lattice Clock

https://spectrum.ieee.org/optical-atomic-clock-advantage-expands-electronics

Increased Accuracy by Accounting for Quantum Noise

With a quantum “squeeze,” clocks could keep even more precise time, MIT researchers propose

10,000 Year Clock

http://www.10000yearclock.net/

https://longnow.org/clock/

Astronomical Skeleton Clock

Commissioned by Mark Franks in Chicago. Built by Buchanan in the UK.

Yes Watch

https://www.yeswatch.com/

Suppliers, Surplus, Related Companies

Used Stuff

https://craigslist.org/

eBay

Auction Ohio

Retail Surplus

https://www.adorama.com/

https://www.newegg.com/

https://www.overstock.com/Electronics/2/store.html

Government Surplus

https://www.govdeals.com/ – Ohio State sells their surplus here.

Watch Parts and Tools

https://www.esslinger.com/ – has lots of tools.

https://www.startimesupply.com/ – good for batteries and miscellaneous watch parts, must be a verified business to order

http://www.julesborel.com/ – see the JBC watch parts database

Cas-Ker Watchmaker and Jeweler Supplies

– based in Cincinnati, tools and parts.

Otto Frei Jewelry Supply and Watch Parts – large selection of watch crystals

Pocket Watch Database

Ranfft.de – for old Swiss caliber number look-up.

Mikrolisk.de – for database of trademarks and trade names

CBS Watch Material – advertised in AWCI email. Advertises Rolex parts.

https://www.watchmaterial.com/ – looks like a well-organized site.

Auctions

https://www.bidfta.com/bidderHome

Miscellaneous

Piano Tools

Science Experiment Supply

Mobilinkd, Terminal Node Controllers for Amateur Radio

https://www.beltime.com/

Henning Custom Watch Parts

Hub City Time

McCaw Watch Parts

Crown and Caliber

Lucius Atelier

Cousins UK

Watch Parts References

Illuatrated Manual of American Watch Movements available from Cas-Ker

BestFit Catalog, part of AWCI’s database, or print available from McCaw

Esslinger Blog Illustrated Watch Parts