TWiT Throwback (Video)

TWiT Throwback (Video)

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TWiT Throwback (Video) episodes

  • Tech News 2Night 407: Right-Brained Smartphones

    Mike Murphy from Quartz explains the neuromorphic chip from IBM, attack of the drones, beware of what you share online, double the trouble, double the security, El Nino is coming are you prepared, and more...

    Host: Megan Morrone

    Guest: Mike Murphy

    Bandwidth for Tech News 2Night is provided by CacheFly.

    Sponsor:

    • wealthfront.com/tn2

      • 18 min
    • Know How... 157: DIY Swamp Cooler, BeerLift, & TrackingPoint Hack

      How an AC works and how to build your own simple version for staying cool this summer, Beer lifting quad copter, and the TrackingPoint gun hack from BlackHat.

      Let's talk about Air Conditioning

      To talk about AC, we first need to make clear what "hot" and "cold" really are.

    • "Hot" is really just energy in the process of being transferred from one body to another -- From the body that has more energy, to the one that has less
    • In any given system, this transfer of energy will take place until you reach maximum entropy: the energy is as evenly distributed among all the bodies in a system as is possible.
    • Also, in any given system, the energy in that system will stay constant (unless that energy is somehow moved away from that system)

      • So... if we have air blowing in our face, and it feel "hot", it just means that the molecules in that air contain more energy than the molecules in our face, and energy is being transferred from the air to our faces.

      Conversely, if that air feels "cold" it means that the molecules in that air contain less energy that the molecules in our face, and energy is being transferred from our faces into the air.

      Now that we have that sorted, let's talk about HOW we make that blowing air hot or cold.

      To make air feel hot, we simply add energy to it:

    • A furnace burns gas or uses electricity to heat up coils
    • Air is blown over the element being heated by the gas or electricity
    • That air "absorbs" heat from the element
    • TA DA! (Hot Air)

      • But to make cold air, the process isn't so simple:

    • We can't just add energy into air to make it cold. We need a way to take energy away.
    • And remember... the energy in a given system will stay constant unless that energy is somehow moved away from that system
    • The answer is to build a system that will absorb heat from one system, and release it into another.
    • And THAT is what an air conditioner is designed to do!

      • Let's talk about a simple 2-stage AC: It has 4 parts

    • Compressor
    • Condensor Coil
    • Expansion Valve
    • Evaporator Coil

    • Compressor
    • The Compressor takes a gas within the system and pressurizes it.
    • Important to note: If you have a gas that has energy level "x" at its regular volume, and you pressurize it to 3x it original pressure in the same volume, then that volume MUST contain 3x the amount of energy. (Again, in a closed system)
    • So... if I have 1 cubic meter of gas at 50 degrees, and I pressurize it to 3x it original pressure, then that volume of gas (at 3x pressure) should be 150 degrees.
    • Super Side Note: This is the "Ideal Gas Law"
    • ((P1*V1)/T1) = ((P2*V2)/T2)
    • (Initial Pressure * Initial Volume)/Initial Temperature = (Final Pressure * Final Volume)/Final Temperature
    • Ok... so now we have a bunch of HOT pressurized gas, but we want COLD gas.
    • Condensor Coil
    • The condensor coil takes the now pressurized gas and gives it contact (through a conductive surface that allows the closed system to retain the gas, while conducting the energy of that closed system) with an outside system.
    • We know that energy (heat) will want to flow from a body of high energy, to a body of lower energy
    • If the system in which that condensor coil is of a lower energy state than the system contained within the coil, then energy (heat) will flow out of the gas, and into that outside system.
    • Given enough time, the
    • Just for

      • Bui

                    These show notes have been truncated due to length. For the full show notes, visit https://twit.tv/shows/know-how/episodes/157

                    Hosts: Fr. Robert Ballecer, SJ and Bryan Burnett

                    Technical Director: Alex Gumpel

                    Sponsors:

                    • SmartThings.com/KnowHow - promo code: KNOWHOW
                    • lynda.com/knowhow

                      • 1 hr
                    • This Week in Computer Hardware 329: Nvidia's 950 and Inside Skylake!

                      So much IDF! Skylake dets, the XPoint Optane tech, DX12 benchmarks, Nvidia's GTX 950 is the new 750Ti, 6TB hard drives, and a beginners guide to LN2 cooling.

                      Hosts: Patrick Norton and Ryan Shrout

                      Technical Director: Burke McQuinn

                      Download or subscribe to this show at https://twit.tv/shows/this-week-in-computer-hardware.

                      Thanks to CacheFly for the bandwidth for this show.

                      Sponsor:

                      • RING.COM/twich

                        • 55 min
                      • Tech News Today 1328: Microsoft on Android - "I'd Tap That!"

                        The next drone to own is a submarine, Google's Project Ara modular smartphone is delayed, Silicon Valley fights back against Donald Trump attacks, and more...

                        Check out the full show notes for today's episode.

                        Host: Mike Elgan

                        Guest: Ryan Whitwam

                        Producer: Jason C. Cleanthes

                        Technical Director: Jason C. Cleanthes

                        Download or subscribe to this show at https://twit.tv/shows/tech-news-today.

                        Thanks to CacheFly for the bandwidth for this show.

                        Sponsor:

                        • ziprecruiter.com/tnt

                          • 19 min
                        • Ham Nation 210: Huntsville Hamfest DIY

                          10ghz contesting with Gordon West, Don returns from Huntsville Hamfest, Kit-Building with CQ Magazine's Joe Eisenberg, and more!

                          Hosts: Don Wilbanks, Gordon West, George Thomas, and Amanda Alden

                          Guest: Joe Eisenberg

                          Technical Director: Bryan Burnett

                          Editor: Victor Bognot

                          Download or subscribe to this show at https://twit.tv/shows/ham-nation.

                          Thanks to Joe Walsh who wrote and plays the Ham Nation theme.

                          Thanks to CacheFly for the bandwidth for this show.

                          Sponsor:

                          • icomamerica.com/hamnation

                            • 1 hr 5 min
                          • Android App Arena 59: Back to School

                            Hands-on reviews of Quizlet, My Study Life, PhotoMath, and Fallout Shelter.

                            Host: Jason Howell

                            Download or subscribe to this show at https://twit.tv/shows/android-app-arena.

                            Bandwidth for Android App Arena is provided by CacheFly.

                            Sponsor:

                            • prosper.com/twit

                              • 16 min
                            • Tech News 2Night 406: Inside the OnHub
                              Jason Cross from Greenbot breaks down the Google router, can Google protect our privacy, Ashley Madison user's info revealed, a sneak peak at a fancy new watch from Samsung, a leashed drone, and more...

                              Host: Megan Morrone

                              Guest: Jason Cross

                              Bandwidth for Tech News 2Night is provided by CacheFly.

                              Sponsor:

                              • wealthfront.com/tn2

                                • 19 min
                              • This Week in Google 314: No More Wet Napkins
                                Google wants to cure disease, thoughts on Alphabet, how Google/Larry Page decides to do cool things, and the new hardware of the OnHub.

                                Hosts: Leo Laporte and Jeff Jarvis

                                Guest: Matt Cutts

                                Download or subscribe to this show at https://twit.tv/shows/this-week-in-google.

                                Thanks to CacheFly for the bandwidth for this show.

                                Sponsors:

                                • FreshBooks.com/twig
                                • legalzoom.com - offer code: TWIG
                                • SmartThings.com/TWIG - promo code: TWIG

                                  • 2 hr 12 min
                                • iFive for the iPhone 156: Ditty, Free LastPass

                                  Update to iOS 8.4.1 to fix Apple Music bugs, turn off location tagging on Instagram for your security, get LastPass for free on your mobile device, and send singing text messages with Ditty!

                                  Host: Megan Morrone

                                  Subscribe to iFive for the iPhone at https://twit.tv/shows/ifive-iphone

                                  Thanks to CacheFly for the bandwidth for this show.

                                  Sponsor:

                                  • gazelle.com

                                    • 8 min
                                  • Windows Weekly 427: This Won't Take Long

                                    Microsoft releases its first Windows 10 PC preview build, Desktop Optimization Pack tools released with Windows 10 support, Xbox App for Windows 10 Updated with 1080p/60fps Game Streaming, and more.

                                    Hosts: Paul Thurrott, Mary Jo Foley, and Leo Laporte

                                    Download or subscribe to this show at https://twit.tv/shows/windows-weekly

                                    Check out Paul's blog at thurrott.com

                                    Check out Mary Jo's blog at AllAboutMicrosoft.com

                                    Thanks to CacheFly for the bandwidth for this show.

                                    The Windows Weekly theme music is courtesy of Carl Franklin.

                                    Sponsor:

                                    • igloosoftware.com/twit

                                      • 1 hr 32 min

                                    About TWiT Throwback (Video)

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                                    Dig into the TWiT.tv archives and enjoy episodes from ten years ago. It's a tech time machine!