Design and Troubleshooting

by admin on November 20, 2017

Most people believe that troubleshooting an electronic circuit is a simple matter of connecting an oscilloscope or multimeter to a circuit and then fixing something. Let me tell you it’s not quite that easy. I think circuit design and troubleshooting are very similar in a lot of respects. In troubleshooting a circuit, you have to discern what a circuit is supposed to do. Once you know that you may or may not be able to tell if it’s broken. You try to change [click to continue…]

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Why so (National) Fine?

by admin on November 19, 2017

Why National Fine (NF) as opposed to National Coarse (NC) when using threaded fasteners?

Strength!

The reason is strength. If you compare the strength of similarly sized fasteners, the one with National Coarse (NC) versus National Fine (NF) threads, you’ll see that the NF threaded fastener is between 10% and 20% stronger than the NC version. As rule of thumb [click to continue…]

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Tips (Part 2)

November 19, 2017

Here’s one that you probably haven’t seen on an electronics site.  Workbench In the this posting I assume you’re going to build your work surface.  If you plan on buying one pre-made, then read this for ideas and consideration to think

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Computer Cleaning

November 18, 2017

Just yesterday, one of the computers in the house wouldn’t turn on… All the computers are set to run diagnostics at night and then turn off. If I’m the last one up at night, I’ll turn off the UPS for the associated computer. Since I’m not usually the last one up it doesn’t happen that [...]

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LM3916

November 18, 2017

Dot/Bar Display Driver The LM3916 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing an electronic version of the popular VU meter. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating [...]

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Test Equipment

November 17, 2017

What Test equipment should I have and what tools should I have on my workbench? If you’re starting from scratch, there are a number of things you’ll need to have. Multi Meter As far as test equipment, you need to have a good Voltmeter. Notice I didn’t say digital, I said “good”. So how do [...]

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Fixing Other’s flubs

November 17, 2017

I have a 42″ LCD TV made by Olevia. Just after it finished it’s warranty period it died. I didn’t have time to devote to fixing it because of other commitments so I took it to a shop for repair. After looking it over, the owner told me it would cost $300 to fix because [...]

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Troubleshooting (part 5)

November 16, 2017

Documentation I’ve been talking about this for a while.  I even offered up some suggestions in my previous post about how to possible modify the trouble shooting procedure.  Here’s another alternative.  I’ve used both methods and, for me, it’s a toss up.  I think I prefer this method a tad bit more as I can [...]

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Troubleshooting (part 4)

November 16, 2017

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

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Tips

November 15, 2017

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 [...]

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