Friday, December 30, 2011

Building Wireless Sensor Networks: with ZigBee XBee Arduino and Processing

Building Wireless Sensor Networks: with ZigBee XBee Arduino and Processing

>>> BlackFriday Building Wireless Sensor Networks: with ZigBee XBee Arduino and Processing



Faludi is kind to the reader by using simple language in the old school of: tell-them-what-you're-going-to-say tell-them and then tell-them-what-you-said.



I bought the book because although I am not a beginner to electronics I am to ZigBee and I am lazy and want a quick start to what to get and why and which "start-bugs" to avoid. Faludi does a good job here and tries to please everybody by including non-Windows based (Mac and Linux) examples where he can (this market is clearly biased towards Windows).



Evidently you could simply download the free ZigBee spec' and read it - it is not too boring and took me about four days to scan through it but for the cheap price I would recommend that even a professional would recover the cost in time saved from this book but evidently he will not be interested in the simplistic treatment of how to connect A to B just the tips and hints and as a quick broad outline for both the spec and the parts range.



For the beginner this book is excellent with both diagrams and photographs of how to wire up the half dozen-or-so connections between one module and another plus very full descriptions + screen shots of how to drive the (mainly Windows based) software.



The firmware example-code is consistently of the simplest-only-to-do-the-principle (there is no cheating by padding with large amounts of code) and gradually the reader is taken into more and more detail about protocols and networking in a painless manner.



A huge amount of work has gone into this book to make it look simple. It is also up to date (late 2010). I highly recommend it to anyone.

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Tuesday, December 6, 2011

507 Mechanical Movements: Mechanisms and Devices (Dover Science Books)

507 Mechanical Movements: Mechanisms and Devices (Dover Science Books)

>>> BlackFriday 507 Mechanical Movements: Mechanisms and Devices (Dover Science Books)



Perfect for the basement tinkerer. This book may not be as comprehensive in its descriptions as "Ingenious Mechanisms for Designers and Inventors" but it is only 1/20th the price.

The illustrations are simple and easy to understand. Often they show the isolated mechanism or mechanical movement independent of any other components. This is great because sometimes all the extra gobbledygook of a technical schmatic can make understanding things a real chore.

If you're an engineer looking for mathmatical equations and formulas this book is not going to help. The text is made up of very simple generalizations such as "changes rotational motion into reciprocating motion."

Great as brain excercise great bathroom reader and economically priced to boot!

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Sunday, October 16, 2011

Ramsond CUT 50DY 50 Amp Digital Inverter Portable Air Plasma Cutter Dual Voltage: Home Improvement

Ramsond CUT 50DY 50 Amp Digital Inverter Portable Air Plasma Cutter Dual Voltage: Home Improvement

>>> BlackFriday Ramsond CUT 50DY 50 Amp Digital Inverter Portable Air Plasma Cutter Dual Voltage: Home Improvement

Technical Details


  • Automatic Dual Voltage/Dual Frequency (110/220v 50/60Hz)
  • Integrated Digital Display of Current (Amps) and Pressure Gauge
  • Integrated Pressure Gauge Display
  • 60% Duty Cycle
  • Max Severance Thickness: 1-Inch Max Cut thickness: 3/4-Inch
Ordered from Amazon on Monday and received on Friday. Four days from Michigan to Missouri is fast shipping.

This machine was packaged well enough to be air dropped if necessary. The outside box was lined with Styrofoam. The inside box was lined with about 1" thick foam that was made to fit the cutter.



It came with everything except an electrical plug which makes sense because it will work on 110 or 220 so there is no way for them to know what type plug to send. I wired mine for 220.

The first thing I cut was some 1/8 " steel. It zipped right through that. I then tried some �" with no problem. The next thing I cut was �" steel. I got through it but I had to take it easy. I didn't have anything thicker but with my lack of skill I'm not sure I would tackle anything thicker than the �".



I also tried some very thin steel and it did a great job with a low amp setting. 1/8" and �" aluminum cut with no problem.

I don't have a steady hand so most of my cuts looked pretty rough but the machine cuts so fast with no resistance it was hard to get a straight cut. Anyone who has used a cutting torch will know what I mean.



I still don't know how they can produce this much cutting power in a 25 pound machine but they did. I am impressed with the machines quality and performance


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