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Welcome to Prutchi.com!

Published on January 4, 2012 by in Uncategorized

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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Nuclear Pacemakers, Pu-238 RTGs, and Betavoltaic Cells

Published on January 4, 2012 by in David, Radioactive

Alcatel Plutonium 238 RTG for atomic pacemaker

I am placing information about nuclear-powered pacemakers, including RTG and betavoltaic power sources under my www.implantable-device.com under the “Nuclear Batteries” Category.

 
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Pictorial Instructions for Modifying ENI CD V700 into David Prutchi’s CDV700 Pro Geiger Counter

Published on January 3, 2012 by in David, Geiger-Müller Counters, Prutchi's CDV700 Pro Geiger Counter, Radiation Detectors, Scintillation Detectors, Shanni

David Prutchi's CDV700 Pro Geiger Muller Counter

We modified a surplus Civil Defense V-700 radiation survey meter made by Electro Neutronics Inc. (Model 6-b) into a very capable radiation counter capable of working with both Geiger-Müller and PMT scintillation probes. We modified the front panel to accommodate the new switches, connectors, and panel light. In addition, we placed a Veeder-Root count totalizer module on the side of the box. The new electronic components, including a Zener diode stack and a PMT preamplifier are wired directly to the original printed circuit board.

The following file shows each step in the modification process with large color pictures and expanded diagrams

Click here for tutorial in pdf format

Click here for datasheet of Veeder-Root totalizer module

More information and experiments available at:  www.diyPhysics.com

 
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Errata for “Design and Development of Medical Electronic Instrumentation”

Published on December 18, 2011 by in David, Medical Book

Errata for: D. Prutchi and M. Norris, Design and Development of Medical Electronic Instrumentation – A Practical Perspective of the Design, Construction and Test of Medical Devices, ISBN: 0-471-67623-3, 450 pages, John Wiley & Sons, Inc., Hoboken, NJ, November 2004.

Pages 86, 87:

October 18, 2005 – Bob Higgins brought the following to my attention:

“…On page 86, the slew rare limit bridge values appear to limit SR to 333V/s. The largest gain before the bridge is 500, so the limit appears to be 0.66V/S applied to the ECG signal, but earlier in the book, 0.33V/s is the recommended limit to block pacemaker pulses…” Read more…

 
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