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  • Issue 266: EQ Answers 14 Jan '17, 3pm

    The answers to the Circuit Cellar 266 (July 2012) Engineering Quotient are now available. The problems and answers are listed below. Problem 1—What’s the key difference between infinite impulse response (IIR) and finite impulse response (FIR) digital filters? Answer 1—An infinite impu...

  • Rewind: The future of #biomedical signal analysis technology.

    The Future of Biomedical Signal Analysis Technology 11 Jan '17, 8pm

    Biomedical signals obtained from the human body can be beneficial in a variety of scenarios in a healthcare setting. For example, physicians can use the noninvasive sensing, recording, and processing of a heart’s electrical activity in the form of electrocardiograms (ECGs) to help mak...

  • Free sponsored article: Matrix MIAC gives you the ruggedness & power of a PLC w/ the flexibility of a controller.

    Flowcode (Part 4): Dev Boards to Pro Apps 02 Jan '17, 1pm

    in this series, you were introduced to Flowcode 7, flowchart-driven electronic IDE that enables you to produce hex code for more than 1,300 different microcontrollers, including PIC8, PIC16, PIC32, AVR, Arduino, and ARM. The second article detailed how to get working with displays in ...

  • “The Internet came along and destroyed that business, and we had to diversify."

    The Flow Coder 31 Dec '16, 8pm

    Products come and go. New products are developed all the time. So, what’s the key to success? John Dobson has successfully run Halifax, UK-based Matrix TSL 23 years. During that time, the company has gone through some changes. He recently gave Circuit Cellar a tour Matrix’s headquarte...

  • Can you transmit on-off (DC) signals btwn 2 pieces of equipment in both directions simultaneously on same wire

    Issue 264: EQ Answers 27 Dec '16, 2pm

    The answers to the Circuit Cellar 264 (July) Engineering Quotient are now available. The problems and answers are listed below, along with a schematic. Problem 1a—Is it possible to transmit on-off (DC) signals between two pieces of equipment in both directions simultaneously on the sa...

  • Take the "hard" out of hardware. The future of technology. #hardware #design #electronics

    Taking the “Hard” Out of Hardware | Circuit 27 Dec '16, 8pm

    There’s this belief among my software developer friends that electronics are complicated, hardware is hard, and that you need a degree before you can design anything to do with electricity. They honestly believe that building electronics is more complicated than writing intricate soft...

  • Issue 274: EQ Answers 16 Dec '16, 10am

    The answers to the Circuit Cellar 274 Engineering Quotient are now available. The problems and answers are listed below. Problem 1— What is wrong with the name “programmable unijunction transistor?” Answer 1— Unlike the original unijunction transistor—which really does have just a sin...

  • Why does power dissipation of a Darlington transistor tend higher than single bipolar transistor in switching apps?

    Issue 272: EQ Answers 30 Nov '16, 3pm

    —In switching applications, a single transistor can saturate, resulting in a low VCE of 0.3 to 0.4 V. However, in a Darlington pair, the output transistor is prevented from saturating by the negative feedback provided by the driver transistor. If the collector voltage drops below the ...

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