email: LOGBOOK at LINEONE dot NET
A major new electronics text book. Click the image above to go to the book's web page.
ANALOG SEEKrets- DC to daylight ... a master class in electronics design A major new text book for electronics designers, and under-graduates planning a career in electronics design. It is also suitable for college professors who desire breadth outside their specialist field.
This is a list of my published work.(Electronics)
A proof of a 'weak' form of Goldbach's Conjecture
LOGInterMod is a Windows program that calculates two-tone intermodulation products up to the 30th order. It is a 32-bit program for Windows 98 onwards. Win98 users may need the shared DLLs mfc42.dll and msvcrt.dll. Windows XP users will not require these DLLs as they come with the operating system. FREEWARE.
LOGlist is a Windows program that counts source code lines in C, C# or C++ files, including header files. There are options for counting pure comment lines and blank lines. It is a 32-bit program for Windows 98 onwards and needs the shared DLLs mfc42.dll and msvcrt.dll. Windows XP will not require these DLLs as they come with the operating system. FREEWARE.
BigCalc is an 80-digit scientific calculator for those really big problems. It contains built-in values of physical and mathematical constants for ease of use. It is a simple Windows program written in Visual C++ 1.00 as a stand-alone EXE file. I doubt that you will find a more accurate calculator than this one. Suitable for Windows 3.1 onwards. FREEWARE.
SoftCalc is a Windows calculator specifically for software engineers. It works simultaneously in decimal, octal, hexadecimal and binary up to 64 bits long. Word size can be changed to suit. Again this is a Visual C++ 1.00 stand-alone EXE file for windows. Suitable for Windows 3.1 onwards. FREEWARE.
Selector is a resistive network calculator for problems using two or three fixed resistors. You have to use standard values, but you need some silly ratio like 3.245V from a 10V source. This program helps you to pick the optimum resistor values. It is a 32-bit program for Windows 95 onwards and needs the shared DLLs mfc42.dll and msvcrt.dll. Windows XP will not require these DLLs as they come with the operating system FREEWARE.
This is a two-dimensional finite element analysis field plotting program. Download it as a FREE DEMO program and you will see what it is capable of. You need to register the program to be able to use it properly. (The unregistered program has an annoying box floating over the screen and some numerical readouts have been disabled.) This is a Visual C++ 6 program and needs mfc42.dll and mscvrt.dll to run. It is a 32-bit program for Windows 95 onwards. Windows XP will not require the DLLs as they come with the operating system
This program was used to plot the field patterns used in the Electronics World articles of March 2001/Dec 2003 and includes the calculation of Stress Ratio as given there.
Download 2D Field
The cost of the program is $79 (US), £39 (UK)
This fee is NOT refundable, so please ensure that the program works on your system before paying the registration fee. Please include the exact name you wish the program to be registered under.(This will be displayed in the program's title bar.)
Email LOGBOOK at LINEONE dot NET for a university department/corporate site-licence quotation, stating the typical number of students/staff in the department.
An external link to some useful information
Softcube Puzzle is a Windows emulation of a Rubik's cube with unique features such as replay of moves, move history, and randomised starts just a few moves away from solving the whole cube. It is a .NET application running only on Windows XP. FREEWARE.
SuDoku Companion is a Windows program that helps you solve prepared Su Doku puzzles and even lets you create original puzzles at the click of a button. It is a 32-bit program for Windows 98 onwards and needs the shared DLLs mfc42.dll and msvcrt.dll. Windows XP will not require these DLLs as they come with the operating system. Beggarware.
This is the original paper on Differential Calculus by Gottfried Leibniz. It is of course in Latin, given the era in which it was published. Even if you can't read Latin, you will still be able to see the basic calculus notation.
Newton and calculus? Well Newton hated controversy and stopped publishing his work. He gave a paper ("De Analysi ...") to a friend in 1669 which apparently had some integral calculus content and this paper was circulated a little amongst mathematicians. Leibnitz is reported to have seen a copy of this work. Thus although Leibnitz was undoubtedly influenced by Newton's work, Leibnitz's work was quite different. Newton eventually published his work on calculus, not in his master work the "Principia ..." but at the back of Opticks in 1704.
page 0, page 1, page 2, page 3, page 4, page 5, page 6, page 7.
Some modern renditions of this theorem do all sorts of silly things, like deriving it from Norton's theorem or using matrix analysis of general networks. The theorem was actually derived using the superposition theorem. See the original French text of this theorem as a ZIP'ed TIFF.
The original text and a translation in Word2000 format.
Consider the three circuits shown above. They are all identical as seen at the terminals, “A” and “B”. If the unloaded voltage at the terminals is measured with a voltmeter, the reading will be 10V in all three cases. If the terminals are short-circuited with an ammeter, all three current readings will be exactly the same, at around 1A. Circuit 3 is the Thévenin equivalent of both Circuit 1 and Circuit 2.
To get from Circuit 2 to Circuit 3, first consider the “open-circuit voltage”, the voltage at the terminals when there is no load. Since R4 and R5 are equal, it is obvious that the open-circuit voltage is half V2, in other words 10V. To find the equivalent resistance the rule is “suppress and short-circuit any voltage sources”. In this case we replace V2 by a short-circuit and it is then clear that R4 and R5 are in parallel as seen from the output terminals, “A” and “B”. Thus R6 is the parallel combination of R4 and R5.
Now it should be clear how to get from Circuit 1 to Circuit 2. R3 in Circuit 1 is in the same position, and has the same value as R5 in Circuit 2. We therefore make V2 and R4 become the Thévenin equivalent of V1, R1 and R2 in the same way as we did before, going from Circuit 2 to Circuit 3.
Look at the power drawn from the voltage sources in each circuit when the terminals are not loaded. V1 supplies 30W, V2 supplies 10W and V3 supplies 0W. This demonstrates the important fact: A Thévenin equivalent circuit is only equivalent as seen at its terminals. A corollary to this statement is: A Thévenin equivalent circuit always dissipates an amount of power that is less than or equal to that in the real circuit.
The original text of this theorem by E.L.Norton of Bell Labs as a ZIP'ed TIFF. This was published as a Bell Labs internal technical memorandum, which is why it is seldom quoted in text books.
[Original supplied by Dr. Sheldon Hochheiser, Corporate Historian, AT &T.]
The original paper on the Schmitt trigger as a ZIP'ed TIFF. The electronic circuit is of course based on thermionic valves, as transistors had not been invented in 1938.
Front page; page 1; page 2; page 3.
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