Why so (National) Fine?

by admin on January 21, 2018

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)

by admin on January 21, 2018

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 [click to continue…]

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Computer Cleaning

January 20, 2018

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

January 20, 2018

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

January 19, 2018

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

January 19, 2018

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)

January 18, 2018

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)

January 18, 2018

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

January 17, 2018

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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Moribund Microwave Oven

January 17, 2018

Way back when, before wife and kids, after college, 1985 to be exact I bought a microwave oven. It was a Sharp model with a rotating carousel. The carousel was rather unique, and most ovens didn’t have one. You were required to stop cooking and rotate the food periodically to ensure even heating. The carousels [...]

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