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Category Archives: Analog Circuits

  1. [TC] Physicists just built the world’s smallest optical switch – based on a single atom

    3

    February 7, 2016 by MrJSY


    As our need for more data and faster transmissions grows, existing network infrastructure is being put under more strain than …
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  2. [TC] Heart rate monitor using 8051

    4

    June 26, 2014 by MrJSY


    This article is about a simple heart rate monitor using 8051 microcontroller. Like the previous 8051 projects, AT89S51 is the …
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  3. [TC] Building an analog meter clock with Atmel and Adafruit

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    October 18, 2013 by MrJSY


    “We wanted to design a microcontroller board that was small enough to fit into any project – and low cost …
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  4. Infrared Illuminator Made With LEDs

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    August 9, 2013 by todayscircuits


  5. Jet engine sound generator

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    August 9, 2013 by todayscircuits


  6. CPU Monitoring Circuit

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    January 14, 2012 by todayscircuits


    Excess heat too much can cause damage to the electronics. Similarly, on a computer or laptop, so monitor the temperature of CPU …
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  7. Rain Detector Circuit

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    November 7, 2011 by todayscircuits


    This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to …
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  8. Leaked Gas Detector

    2

    September 16, 2011 by todayscircuits


    Description:As shown by the gas sensor alarm QM, buck rectifier and regulator circuits, integrated circuits KD28, speaker Y and so …
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  9. AC Powered Blinking LED

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    August 31, 2011 by todayscircuits


    I needed a pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, …
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  10. Fridge Door Open Alarm

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    August 31, 2011 by todayscircuits


    It beeps if the fridge door is left open for too long or hasn’t closed properly, to stop food from …
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