Schedule

Schedule

Wednesday, November 26

1417019400 FLOSS Weekly
1417024800 Tech News Today
1417028400 Windows Weekly
1417035600 This Week in Google
1417046400 Tech News 2Night
1417048200 Android App Arena
1417053600 Ham Nation

Saturday, November 29

1417287600 The Tech Guy

Sunday, November 30

1417374000 The Tech Guy
1417388400 This Week in Tech

Monday, December 1

1417456800 Tech News Today
1417460400 Triangulation
1417465800 iPad Today
1417478400 Tech News 2Night

Tuesday, December 2

1417543200 Tech News Today
1417546800 MacBreak Weekly
1417554000 Security Now
1417561200 Before You Buy
1417564800 Tech News 2Night
1417568400 All About Android
1417577400 Padre's Corner

Wednesday, December 3

1417624200 FLOSS Weekly
1417629600 Tech News Today
1417633200 Windows Weekly
1417640400 This Week in Google
1417651200 Tech News 2Night
1417653000 Android App Arena
1417658400 Ham Nation

Thursday, December 4

1417716000 Tech News Today
1417719600 Know How...
1417723200 Marketing Mavericks
1417728600 Coding 101
1417732200 Home Theater Geeks
1417737600 Tech News 2Night
1417739400 The Giz Wiz

Friday, December 5

1417802400 Tech News Today
1417806000 This Week in Law
1417824000 Tech News 2Night

Most Recent Episodes

Security Now
Episode #483: Let's Encrypt November 25th, 2014

Steve Gibson looks in depth at new Certificate Authority "Let's Encrypt".

MacBreak Weekly

Iphone 6 Plus Pixel Peeping and Beats music coming to iOS.

Tech News 2Night

Will Safari Ditch Google?

Tech News Today

Sony Pictures gets hit with a devastating hack.

iPad Today

Dropbox Carousel, Square + Apple Pay, Product (RED) apps.

Tech News 2Night
Episode #222: New Drone Rules November 24th, 2014

New rules for drones you might not like, Netflix's big push into Asia, and the spying malware that

This Week in Enterprise Tech

Steve Gibson on Regin

Triangulation

Philosopher at University of Oxford, author of "Superintelligence."

Tech News Today

Government-backed malware Regin discovered.

The Tech Guy
The Tech Guy 1138 November 23rd, 2014

Congress to allow NSA spying to continue.

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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