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Nickname: eeInvestigations     Articles(77)     Visits(40244)     Comments(3)     Votes(50)     RSS
Engineering Investigations creates blog space for engineers to describe how they cracked a baffling technical problem and talk about ingenious solutions they developed to solve it. It celebrates your achievements and inspires others to follow suit.
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Posted: 07:58:11 PM, 10/07/2014
A week ago, I posted this blog in which I posed a puzzle involving the following circuit:   Click here for a larger image.   As I noted, these are a number of clues hidden in the schematic. From these clues, your mission was to describe the most likely loads for the drains of tran......

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Posted: 05:28:26 PM, 04/07/2014
There is a conceptual project that I hope to make reality soon. I was able to present it at one of the Gadget Smackdown sessions at the EE Live! 2014 conference and exhibition. This project is an open-source radio transmitter for RC hobbyists. This transmitter will be reconfigurable, allowing it t......

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Posted: 06:31:30 PM, 03/07/2014
When I first tried to run a quantum mechanical calculation in a computer, I used a humble Sinclair Spectrum ZX+. These days we have GFLOPs-scale computational capabilities available to us in products as unassuming as a smartphone.   Quantum simulations that previously required a huge and ex......

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Posted: 08:14:56 PM, 02/07/2014
What are the missing loads? This circuit board plugs into something, but we know not what.   Click here for a larger image.   From the clues (there are at least four of them) hidden in the schematic above, what would you say are the most likely loads for the drains of transistors......

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Posted: 10:03:50 PM, 25/06/2014
Teeth may soon be repaired without the drill, so dreaded by some, as a new technique has been developed at King’s College London.   It is called electrically accelerated and enhanced re-mineralization (EAER), and the inventors claim that it accelerates the natural movement of calcium ......

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Posted: 01:28:13 PM, 13/06/2014
PCB layout designers used to work from schematics that were usually drawn in a meaningful way so as to show circuit functionality and to be readable. For example, cross-page connects indicated by angled wires pointing to each other. (See My preference for creating my own PCB symbols.)   The......

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Posted: 01:15:38 PM, 13/06/2014
As a result of the Yom Kippur War of 1973, university studies in Israel were suspended, since most of the staff and students had been called up. During the hiatus, I found a job at a company called Elbit Computers, a subsidiary of Control Data Corp., a supercomputer giant at that time.   I ......

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Posted: 05:56:53 PM, 11/06/2014
Albert Einstein has been quoted as saying, "Everything should be as simple as possible, but not simpler." I would never claim to have his level of insight -- or such an awesome head of hair -- but as an engineer, I wholeheartedly agree with this statement.   It definitely applies ......

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Posted: 01:53:50 PM, 27/03/2014
A young colleague was trying to make a measurement using an analogue-to-digital converter (ADC) and convert this measurement into a voltage to be displayed. He was playing around with the floating-point functions of the compiler. I observed that there was no real need to use floating-point data or......

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Posted: 04:15:31 PM, 26/03/2014
In this blog, I thought we should consider things in the context of microprocessors. In almost every piece of electronic equipment we use today, there will be some kind of microprocessor (MPU) or microcontroller (MCU) controlling the operation. Following Moore's Law, microprocessors have dou......

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