Project

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    300W Power Amplifier PA300
    October 24, 2015
    Taken by themselves, the properties of the PA300 amplifier are not revolutionary. But taken in combination, they show something special: a robust 300-watt Hi-Fi power amplifier that is not...
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    Door Bell Memory
    September 15, 2015
    A memory function with just two transistors. Sometimes it’s useful to know if a visitor called while you were out. Maybe you’re expecting a delivery of essential electronic components; this...
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    DTMF-Controlled Switch
    November 5, 2015
    This circuit can be called using your mobile or a regular telephone set (with DTMF keys) and after passing some procedures, you can control DC-powered appliances installed in your...
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    Intelligent PC Fan Controller
    November 4, 2015
    Controls a maximum of 6 PWM fans ! In a modern PC you will find a number of fans for removing the heat that is generated. These can’t always be...
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    Modular Dot Matrix Display
    October 20, 2015
    Moving signs are a common enough sight today but off-the-shelf units are invariably expensive and somewhat inflexible. The six-character module described in this article can be cascaded up to...
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    TimeClick
    November 5, 2015
    Programmable camera controller This project dubbed TimeClick controls a digital SLR camera without human intervention using a wired connection. It can take photographs at fixed or random time intervals or...
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    Zero-Electrolytics 555 Timer
    November 2, 2015
    The more resistance the better! A timer circuit that turns on a pump for a short time every five minutes can be easily made using the famous 555 IC. Unfortunately,...