Cutting-edge diy projects 

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Welcome to Prutchi.com!

Welcome to our site, a blog dedicated to the cutting-edge do-it-yourself projects that we develop at home.

Shanni and David are the authors of the book “Exploring Quantum Physics through Hands-On Projects,” which will help you understand Quantum Physics through hands-on experiments that you can conduct at school or at home! For our modern/quantum physics site, please go to diyphysics.com.

David is also the author of the book “Design and Development of Medical Electronic Devices,” which will let you master the building blocks of medical devices. David has over twenty years of experience in the design of Medical Electronic Instrumentation, most of it developing active implantable medical devices. For David’s implantable devices site, please go to implantable-device.com.

We discuss all of our other projects on this site. There is plenty of information, so take your time exploring.  Please navigate through the permanent pages, as well as through the many blog post categories listed in the sidebar to the right.

We hope that you enjoy reading our blog.

The Prutchis

 
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Engineering Girls! The Prutchi family endorses this video!

 
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Possibly the Only Accessible Border Demarcation Pillar Placed under the Franco-British Boundary Agreement of 1920

 

Border marker pillar Syria Lebanon Palestine Israel 1920 David Prutchi PhD

My brother in-law, an Ob/Gyn physician and retired high-ranking Israeli Army officer is also a history scholar. He recently took us offroading in the Gallil to a rather unknown site that he found through his research on the Franco-British Boundary Agreement of 1920.  This agreement established the boundary between the Mandate of Palestine attributed to Great Britain, and the Mandate of Syria and the Lebanon, attributed to France.

We trekked to what may be the only accessible border demarcation pillar placed under the Franco-British Boundary Agreement of 1920. In 1922, 38 of these boundary markers were placed along the 49-mile (78 km) boundary. According to Newcombe-Paulet field survey of 1923, 71 boundary pillars were erected on the Syria/Lebanon border with Palestine. Most of these boundary pillars are either inside mine fields or have been removed by looters or people ignorant of their historical significance.

I haven’t been able to find even one picture of such a boundary pillar on the Internet, so my series of shots may be unique…  This picture, by the way is of the boundary marker at “Cairn 45″.  More pictures are available on my Flickr set.

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Back from the Galapagos Islands – My best trip yet!

Blue footed booby, Galapagos Islands, (c) David Prutchi, Ph.D. 2012

Abigail and I are back from the Galapagos Islands.  This was my fifth time there, and certainly the best yet!  Like the two last times, I used Ecoventura to organize the trip, and continue to be impressed by their outstanding dedication to service.

Ecoventura operates three 16-passenger cruise yachts and one diving catamaran.  The three cruise yachts are identical to each other, and I’ve travelled in all 3 with equal comfort (“Flamingo” with Shanni, “Eric” with Hannah, and “Letty” with Abi).
Ecoventura's Letty, Galapagos Islands, (c)2012 David Prutchi, Ph.D.
My preference is to use these yachts instead of the larger ships (that can hold up to 100 passengers) because of the personal service, and especially because Ecoventura keeps their landing groups small – a maximum of 10 passengers per Naturalist Guide.  Since yachts/boats get equal visiting slots from the National Park, being the only group on an island, and having a naturalist just for your group makes an enormous difference.  I have travelled in the larger ships, and because of this difference wouldn’t go back.
As a disclaimer – I’m not related to Ecoventura in any way besides being a very satisfied repeat customer.
 
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Pilgrimage to the Holy Dish

Prutchi family visit to Arecibo Observatory Radio-Telescope in Puerto Rico. Dsvid Dorith Shanni Hannah Abigail Prutchi diy radio-astronomy

This summer we fulfilled a life-long dream (at least for some of us) and visited the Arecibo Observatory in Puerto Rico.

This is the largest single-dish radiotelescope in the world.  The reflector is 305 m (1,000 ft) in diameter – a tad bit larger than our home-brewed radiotelescope.  The Arecibo system is a semi-transit telescope that has a fixed primary reflector with secondary (Gregorian reflector) and a delay-line feed.

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Recent Articles About Us

Our DIY work on Quantum Physics was featured this month in MAKE Magazine and the Philadelphia Exponent!

MAKE Magazing article about diy Quantum Physics book by David and Shanni Prutchi

 

Philadelphia Exponent article about diy Quantum Physics by David and Shanni Prutchi

 
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Sad Day at the Prutchi’s – We will miss our Neutron (May 15, 2002 – May 27, 2012)

Neutron Prutchi

Neutron 2002-2012

 
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Product Development

Published on May 1, 2012 by in Geek Humor


 
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Great Time at US Science & Engineering Festival in Washington DC

Shanni Prutchi with fellow diy SCience author Theodore (Theo) Gray

We had a fantastic time this weekend at the US Science and Engineering Festival in Washington DC.  Among the highlights of our visit, we sat insanely close to the stage for the Q&A with Mythbusters Jamie Hyneman and Adam Savage.  We also had the pleasure to meet fellow diy Science authors Theo Gray (Mad Science, The Elements, Popular Science’s Gray Matter, etc.) and William Gurstelle (Backyard Ballistics, Whoosh Boom Splat, The Practical Pyromaniac, etc.).

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d.i.y. High-Power, Swappable-Head, UV/IR/Visible LED Flashlight with Intensity Control

High-Power UV/IR/Visible Flashlight. David Prutchi Ph.D.  www.prutchi.comI urgently needed a high-intensity UV/IR/visible light source for a work-related industrial inspection project, so this weekend I recruited Abigail to help me build a 10W LED flashlight that features swappable UV/IR/visible heads.  We decided to document the build since this flashlight would fit nicely in a photographer’s kit for light painting, IR illumination, UV reflected photography, or UV fluorescence photography.

Our flashlight is based on LedEngin’s LZ4-40____ series 10W LEDs.  These are available in wavelengths ranging from the infrared through the ultraviolet.  White-light LEDs of different color temperatures are also available as part of this series.

WARNING!  This flashlight is capable of producing very powerful invisible radiation in the UV and IR.  The eye’s protection reflexes do not work at these wavelengths, and may thus cause extensive damage if exposed to direct or specular illumination.  In addition, UV at 365nm may cause damage to the skin.  Never point this flashlight at anyone without taking proper precautions!

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Posted to diyPhysics.com: Testing Electronic Goldmine’s “Giant Super Sensitive Geiger Muller Tube MC6″

russian made nos MC6 GM Tube from Electronic Goldmine. David Prutchi PhD  www.prutchi.com I purchased two “Giant Super Sensitive MC6″ GM tubes from Electronic Goldmine (Item Number : G18717, Unit Price: $89.95).  These are Russian-made new-old-stock model MC6.  They are 10.25″ long x 0.9″ diameter.  I compared the sensitivity of these tubes to the other GM tubes that I use with my CDV700 Pro Geiger Counter.  I posted the results at:

http://www.diyphysics.com/2012/03/30/testing-electronic-goldmines-giant-super-sensitive-geiger-muller-tube-mc6/

 

 
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