High and Low Voltage Cut-Off with Delay and Alarm

Simple and easy build High and Low Voltage Cut-Off with Delay and Alarm Circuit. This straight forward circuit will protect electrical appli...

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Easy Build a Cat and Dog Repeller

Nowadays, just about every house has an outside lamp with a motion sensor. Such a device eliminates the need to feel your way to the front d...

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Animal Friendiy Mousetrap

This mousetrap is built around a PlC12F683 and uses an infrared transmissive optical sensor that is modulated at a frequency of 38 kHz, so t...

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12-volt Cellar Drain Pump

This circuit lets you control a pump, to keep the level of water in a cellar below a certain threshold, for example. Power  is supplied to t...

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Digital Remote Thermometer

Remote sensor sends data via mains supply, Temperature range: 00.0 to 99.9 °C This circuit is intended for precision centigrade temperature ...

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