This diode tester circuit is very simple and can quickly determine the condition of a diode. The circuit checks for sure if a diode is open, shorted, or working properly. If lamp A lights, the diode is functional. When lamp-B is lit, the diode is good but connected backwards. Whenever the two lamps are lit, the diode is-shorted, and it is open if neither lamp is lit.
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Diode tester
DIY : VGA to MAC connector
Maybe one of you has a problem with a faulty monitor your mac and want to replace with a regular PC monitor. But you realize that MAC VGA connector is different.
Rain Alarm
For some areas that are facing the rainy season like in my place, this Rain Alarm circuit project might be a little helpful to give warning that there will be rain. This is helpful, for example if you are inside the house and were doing activities that make you forget that you’re hanging clothes outside. Rain Alarm immediately will give a warning to you.
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