Troubleshooting (part 4)

by admin on May 20, 2012

So How did you do?  Did you build you troubleshooting guide for no Power?  Did you start?  I hope so, the best way to do anything is to “jump in” with both feet or “go for it”. Nike’s ad is in a similar vein: “Just Do It”

As promised, I’ll show you my troubleshooting [click to continue…]

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Tips

by admin on May 19, 2012

As I think of tips I’ll post them and once I get enough, I’ll collect them on a single page so that they’ll be easier to find.  You may have noticed some random part numbers appearing on the site.  Since I’m always taking things apart and figuring out what they do, I’ve decided that I’d start posting any of the datasheets that I research on my website.  I don’t intend to be a “one stop shop” or complete repository, but as I figure things out, I’ll post the datasheets here. [click to continue…]

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Troubleshooting technique (part 3)

May 19, 2012

(…continued)As I mentioned at the end of the last post, I’ve never owned an electronic repair shop.  In addition to all the things I mentioned in that post, I’ve worked in the military aboard nuclear submarines, I’ve worked in the chemical industry and the semiconductor industry.  In every case, the success of the organization has [...]

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Troubleshooting techniques (part 2)

May 18, 2012

(…continued) From the generalist to the specialist (Remember from part one that my mechanic had figured out nothing that I hadn’t already  figured out and had sent me to a automotive electric specialist. ) On one hand I was elated that I was as smart as the guys in the shop on the other hand [...]

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Improving your troubleshooting techniques

May 18, 2012

Practice makes perfect!  (or does it) This is an expression often heard as a child when learning something new like playing the piano, or any musical instrument for that matter. It is used in sports, whether it is the child learning to throw and catch a baseball or pass a soccer ball or even tying [...]

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Is measuring voltage dangerous?

May 17, 2012

Measuring voltage and how to use a digital multimeter (DMM) can be confusing to a beginner and potentially dangerous depending on what you happen to be measuring the voltage of. For example if you are measuring the voltage inside a television set or other device that has a Cathode Ray Tube (CRT) there will be [...]

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Why can’t Starbucks use regular size names?

May 17, 2012

I don’t know about you, but I like small, medium and large as size names. Starbucks uses Tall, Grande and Venti as their size names. How to decipher that? Below is a table showing you the sizes of the drinks. All volumes are in ounces. Size Hot Cold Short 8 N/A Tall 12 12 Grande [...]

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Bad Capacitors

May 16, 2012
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2N3904

May 16, 2012

Silicon General Purpose NPN Transistor This NPN bipolar junction transistor is designed as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100 MHz as an amplifier. .Datasheet

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2N2222 / 2N2222A

May 15, 2012

General Purpose NPN Transistor 2N2219A, 2N2221 and 2N2222A are silicon planar epitaxial NPN transistors in JEDEC TO-39 (for 2N2219A) and in JEDEC TO-18 (for 2N2222A) metal case. They are designed for high speed switching and small signal applications at collector current up to 500mA, and feature useful current gain over a wide range of collector [...]

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