Schedule

Schedule

Wednesday, April 16

1397671200 Windows Weekly
1397678400 This Week in Google
1397689200 Tech News 2Night
1397691000 The Giz Wiz
1397696400 Ham Nation

Thursday, April 17

1397754000 Tech News Today
1397757600 Know How...
1397761200 The Social Hour
1397766600 Coding 101
1397770200 Home Theater Geeks
1397775600 Tech News 2Night
1397779200 OMGcraft

Friday, April 18

1397840400 Tech News Today
1397844000 This Week in Law
1397862000 Tech News 2Night

Saturday, April 19

1397930400 The Tech Guy

Sunday, April 20

1398016800 The Tech Guy
1398031200 This Week in Tech

Monday, April 21

1398099600 Tech News Today
1398103200 Triangulation
1398108600 iPad Today
1398121200 Tech News 2Night

Tuesday, April 22

1398180600 Marketing Mavericks
1398186000 Tech News Today
1398189600 MacBreak Weekly
1398196800 Security Now
1398204000 Before You Buy
1398207600 Tech News 2Night
1398211200 All About Android

Wednesday, April 23

1398267000 FLOSS Weekly
1398272400 Tech News Today
1398276000 Windows Weekly
1398283200 This Week in Google
1398294000 Tech News 2Night
1398295800 The Giz Wiz
1398301200 Ham Nation

Thursday, April 24

1398358800 Tech News Today
1398362400 Know How...
1398366000 The Social Hour
1398371400 Coding 101
1398375000 Home Theater Geeks
1398380400 Tech News 2Night
1398384000 OMGcraft

Friday, April 25

1398445200 Tech News Today
1398448800 This Week in Law
1398466800 Tech News 2Night

Most Recent Episodes

Tech News Today

Samsung plans to launch a fifth smartwatch product, politicians want to kill voluntary industry kill switch proposals, LaCie says they've been leaking customer data to crooks for a year, and more.

All About Android

Heartbleed's Android impact, Google Glass for everyone, Samsung Galaxy S5 review, Ara gets a date, Amazon phone is leaked, and more.

Before You Buy

The Samsung Galaxy S5, Dell Precision M3800 Mobile Workstation, Outdoor Tech Privates Wireless Headphones, Logitech Harmony Keyboard, and the Automatic.

Security Now

The previous week consisted of nearly a single story: Heartbleed. It was only "nearly", though, because we also received the results from the first phase of the TrueCrypt audit.

Tech News 2Night

Google's Project Ara has a launch date, what Amazon's smartphone looks like, Roku now has voice search too, Yahoo's earnings, Google Glass goes on sale for one day only, and Twitter buys Gnip.

MacBreak Weekly

When we might see a new Mac Mini, Jony Ive gets more power at Apple, would you pay $1,000 for an iWatch? And more.

Tech News Today

Google snatches a drone company everybody expected Facebook to buy, details on the Amazon smartphone, 4K laptops are here, and more.

OMGcraft

Chad shows off some cool things you can do with Soul Sand in Minecraft.

Marketing Mavericks

On Marketing Mavericks, we speak with VentureBeat about their new mobile study, what is Omni-Channel, and responsive design.

This Week in Enterprise Tech

The US missed its own XP deadline, FTC can sue companies over data breaches, 900 Canadian Social Insurance Numbers stolen with Heartbleed, and more.

Know How... 70

Fun with Thermocouples and Organizing Your Ripped DVDs

November 21 2013

We're making power with thermocouples and it's time to organize your ripped DVD collection.

Making News

If you've ever wanted to make a Raspberry Pi computer, but thought it was too hard, there's a new Kickstarter project called "Kano." Its goal is to make the Raspberry Pi as simple as a Lego project. You learn to code games like Snake and Pong to get into coding as well.

In other Raspberry Pi news, Mathematica and Wolfram Language will be free for the Raspberry Pi. Those are super-powerful programs -- free is a great deal.

Making Power with FIRE!

In episode 65 we explained how the "Seebeck Effect" allows a thermocouple to turn heat into electricity. When two different types of metal are joined (via soldering, welding or clamping) a heat source will cause them to expand at different rates, generating a small electrical current. That same device can be used to move heat from one side of the junction to the other when an electrical field is applied to the thermocouple, using a principle known as the "Peltier Effect."

Combine many of these thermocouples into a single unit and you have a TEC or TEG. (Thermo Electric Cooler / Thermo Electric Generator). Both of these devices can take advantage of either the "Seebeck Effect" and the "Peltier Effect" to alternatively heat/cool or generate electricity from a heat source.

TEGs differ from TECs in that it can handle much higher temperatures than a TEC before failure.

Parts List

  • TEC (ThermoElectric Cooler) or TEG (ThermoElectric Generator)
  • Heat Spreader
  • Heat Sink/Heat Removal Device
  • Thermal Compound
  • Heat Source

Assembling your Power Generation Unit

  • Coat the TEC/Heat Sink/Heat Spreader with a THIN coat of thermal compound. This is to ensure efficient and EVEN transfer of heat from the heat spreader into the TEC/TEG, into the heat sink.
  • Mount your TEC/TEG between the heat spreader and the heat sink. You want an EVEN mounting, any gaps or uneven mounting will cause heat to build up in on part of the element, causing early failure of the unit.
  • Wire your TECs/TEGs in series or parallel. In series (negative to positive) your TECs/TEGs will add their voltage to the total voltage availible. Each TEC/TEG will generate ~1.5 volts and a few hundred ma. In parallel (positive to positive, negative to negative) your TECs/TEGs will increase the amperage availible. - Know your application before wiring!
  • Cool the "Cool Side" - The power generating capacity of a TEC/TEG assembly will depend on the "Delta T" - or difference in temperature between the hot side and the cold side. Try to make the cold side as cold as possible to maximize power generation.
  • Heat it up!

Organizing your ripped DVDs in Media Center

If you like having your DVD collection in your Media Center organized, you might want to try out MyMovies. It's a free plugin for Media Center that will pull in metadata for the DVDs you've ripped. MyMovies can even act as a database for your *shudder* offline DVDs.

We're going to stick to the DVDs you've ripped, though. (To find out how to rip your DVDs, check out Know How... 22.) Download MyMovies. You'll open the MyMovies Collection Management app on your Windows machine. From there you'll add your DVDs by hitting "Add Title" in the toolbar. Then select "Import Folders" and browse to your DVD folder. MyMovies will attempt to find the metadata for your video.

If MyMovies doesn't automatically find the correct data, you can find the title on IMDB. If you take a look at the URL of an IMDB title you'll see something like www.imdb.com/title/tt0103359 - you can input the "tt103359" number in MyMovies for identification. This is pretty useful for remakes. If you make changes to a title, make sure you hit "Save Title" on the bottom of the program to save your progress.

When you're done with importing all your information, make sure you backup your database. You'll thank yourself later.

Chrome Keyword Quicktip

Did you know that you could call up your favorite sites in Chrome using keywords? It's not a well known feature, but it's hidden in the Manage search engines pane.

Find a site you frequently visit and copy that URL (this tip makes the most sense for long domain names or Google Drive documents). Go into your Chrome Settings, then click "Manage search engines..." Then scroll all the way to the bottom of the list of search engines. You'll see three fields. Add a name for your favorite site in the "Add a new search engine." Put the URL in the "URL with %s in place." Then choose your keyword that will let you call the URL from the address bar. Hit done.

In our case, we wanted to load a Google Drive document. I gave it the keyword "hpx." Now, when I type "hpx" in the address bar, the website will load. In general, this can save you time since you don't have to remember long URLs and you don't have to find them in your bookmarks folder.

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