Olympus OM 200mm f/4 lens versus Canon EF-S 55-250 IS

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Category: photography photography

Published: 03 May 2013 03 May 2013

		The In this article, I compare an "old" Olympus OM Zuiko 200 mm lens with a modern Canon EF-S 55-250mm IS lens set at 200mm.

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Transistor Amplifier Calculator

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Category: electronicsanddiy electronicsanddiy

Published: 03 February 2013 03 February 2013

		An Excel-based transistor amplifier calculator.

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My Lab Tour

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Category: electronicsanddiy electronicsanddiy

Published: 27 January 2013 27 January 2013

		Welcome to the paulorenato.com electronic's lab. In this article we have a look at my workspace and the many gadgets I've collected over the years.

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Diode temperature sensor calibration using Arduino and SHT15 module

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Category: electronicsanddiy electronicsanddiy

Published: 23 December 2013 23 December 2013

		A simple diode or the output of a transistor bias circuit can be used as a rough temperature sensor. For this purpose, a calibration procedure using a precise temperature sensor is recommended. This article shows how to calibrate such a temperature sensing circuit using an Arduino and the SHT15 Sensirion temperature/humidity sensor module.

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Sound Activated Laser Parking System

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Category: electronicsanddiy electronicsanddiy

Published: 05 August 2012 05 August 2012

		This is a link to the article I published in the May 2012 edition of the Nuts & Volts magazine: a sound activated, laser parking system.

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Is your file encrypted? A visual test with R

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Category: Miscellaneous Miscellaneous

Published: 18 January 2015 18 January 2015

		A quick visual "test" to see if a file is likely encrypted using the R statistical computing package.

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A Dollar Store Voltmeter

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Category: electronicsanddiy electronicsanddiy

Published: 10 November 2012 10 November 2012

		How to make a cheap panel voltmeter from a dollar-store pedometer.

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Make Your Own Sensor Loupe

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Category: photography photography

Published: 27 April 2012 27 April 2012

		How to build your own illuminated sensor loupe for camera sensor cleaning (or other purposes).

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Favorite Photography Quotes

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Category: photography photography

Published: 25 April 2015 25 April 2015

		Some of my favorite quotes about Photography.

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The 4 Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality

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Category: bookreviews bookreviews

Published: 11 February 2016 11 February 2016

		Author: Richard Panek Rating: 8/10 Amazon.com link

It is a very strange Universe out there...

Read more: The 4 Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality