General Interest

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    Ultrasonic Level Meter
    August 31, 2016
    Distance and Level Gauge With Alarm Function Small, widely available and dirt-cheap ultrasonic sensors enable us to design both simple and lavish measuring devices for all kinds of ranging. Take...
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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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    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,...