Schedule

Schedule

Monday, October 20

1413824400 Tech News Today
1413828000 Triangulation
1413833400 iPad Today
1413846000 Tech News 2Night

Tuesday, October 21

1413910800 Tech News Today
1413914400 MacBreak Weekly
1413921600 Security Now
1413928800 Before You Buy
1413932400 Tech News 2Night
1413936000 All About Android
1413945000 Padre's Corner

Wednesday, October 22

1413991800 FLOSS Weekly
1413997200 Tech News Today
1414000800 Windows Weekly
1414008000 This Week in Google
1414018800 Tech News 2Night
1414026000 Ham Nation

Thursday, October 23

1414083600 Tech News Today
1414087200 Know How...
1414090800 Marketing Mavericks
1414096200 Coding 101
1414099800 Home Theater Geeks
1414105200 Tech News 2Night
1414107000 The Giz Wiz

Friday, October 24

1414170000 Tech News Today
1414173600 This Week in Law
1414180800 Android App Arena
1414191600 Tech News 2Night

Saturday, October 25

1414260000 The Tech Guy

Sunday, October 26

1414346400 The Tech Guy
1414360800 This Week in Tech

Monday, October 27

1414429200 Tech News Today
1414432800 Triangulation
1414438200 iPad Today
1414450800 Tech News 2Night

Tuesday, October 28

1414515600 Tech News Today
1414519200 MacBreak Weekly
1414526400 Security Now
1414533600 Before You Buy
1414537200 Tech News 2Night
1414540800 All About Android
1414549800 Padre's Corner

Wednesday, October 29

1414596600 FLOSS Weekly
1414602000 Tech News Today
1414605600 Windows Weekly
1414612800 This Week in Google
1414623600 Tech News 2Night
1414630800 Ham Nation

Most Recent Episodes

This Week in Tech
Episode #480: And. Roid. October 19th, 2014

Apple Pay, Twitter turmoil, cable chaos, and more.

The Tech Guy
The Tech Guy 1128 October 19th, 2014

OS X Yosemite, Android Lollipop, and more.

The Tech Guy
The Tech Guy 1127 October 18th, 2014

Could a neighbor's Wi-Fi affect my Wi-Fi reliability?

Tech News 2Night

Snapchat feeds will soon have ads.

This Week in Law
Episode #279: Blame Kevin October 17th, 2014

Should parents be responsible for what their kids do online?

Android App Arena
Episode #17: Alarm Clocks October 17th, 2014

Hands-on reviews of Timely, Sleep as Android, Alarmy (Sleep if U Can) and Androidify.

Tech News Today

A Guardian report yesterday slammed the anonymous messaging app Whisper for tracking users.

Know How...

Batteries, Tor Bundle, and Quadcopter Part One

This Week in Computer Hardware

Testing 4-Way SLI of GTX 980s and new tablets from Google and Apple.

The Giz Wiz

Halloween hair dying.

Know How... 83

Linux on a USB and Sound Controlled LED

March 6 2014

Why you should understand DNS, make a bootable Linux OS on a USB, and control a string of LED's using TIP31 transistors.

Check out our transcripts.

Making a Bootable Linux USB Drive

Step 1: Get a USB Drive

- You'll need a USB flash drive of at least 2GB or more.
- Format the USB Drive by using Disk Utility and use MS-DOS (FAT)

Step 2: Download the USB Loader
- Go to Seven Bits Mac-Linux USB Loader to download the software.
- Download the Distribution of Linux of your choice, I chose Ubuntu
- Create Live USB
**This process should only take about ten to fifteen minutes.

Step 3: Reboot
- Reboot your Mac, on startup when you hear the "chime" hold the "alt / option" key to choose your boot method
- Select your USB Drive, press 1 to load Linux.
- Congrats you have a portable USB OS!

Links:
Seven Bits Mac-Linux USB Loader
Mac-Linux USB Loader on GitHub

LED lights & TIP31 Transistors

LED Lights
* LED stands for "Light Emitting Diode"
* Diodes only allow current to pass in one direction - positive to negative
* LEDs are low-cost, efficient light sources
* SMD (Surface Mount) LEDs can be found in rolls backed with adhesive

TIP31 Transistor
* It's a NPN (Negative-Positive-Negative) bipolar junctions used for medium power applications.
* We're using a TIP31C -- which is capable of 100v and 40 Watts
* Pin 1 and 3 are a junction. Used by a lower-power circuit.
* Pin 2 and 3 is a semi-conductive pathway.
* When a charge passes between junction 1 and 3, it allows a charge to pass between 2 and 3.
* Where this becomes useful is that the charge passing between pin 1 and 3 can be small while the charge passing between pin 2 and 3 can be large.
** The voltage from the headphone hack of a media play is 1-2 volts, perhaps 20ma. That would never be enough to drive a LED strip.
** HOWEVER... we can use that small current between pins 1 and 3, to trigger a much larger current between pins 2 and 3.
** If pins 2 and 3 are the negative side of a 12 volt, 2 amp circuit, then we've just created something useful!

Sound-Sensitive LED Lights

Parts List

Tool List

  • Soldering Iron
  • Scissors
  • Wire Stripper/Clipper
  • Lighter
  • "Helping Hands"
  • Needle-nose Pliers

The Process
Dancing LED Schematic

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