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Archive for the ‘Detector’ Category

 Refrigerator Door Detector Alarm

Sunday, July 13th, 2014

This is a Refrigerator Door detector alarm, it will detect light of lamp in the fridge and alert with buzzer. This projects is small size, easy to make and cheapest. It will alarm when Small child secretly eating candy or medicine stored in the refrigerator or sometimes forget to close the door is not closed. […]

 Over and Under voltage protection of electrical appliances

Friday, July 11th, 2014

This is an over and under voltage protection to all electrical appliances are safe. We use electronics circuits, high accurate work is fast LM393, AN6780 and more. Which cut off currents with power relay. I’ve presented this way, it is Over & Under Voltage protection circuit. But today, I’d recommend this because there is a […]

 Simple Non-Contact AC Mains Voltage Detector

Friday, April 25th, 2014

This is simple non-contact AC mains voltage detector next one circuit that use all transistor as main. Which many friends like this circuit. It use CD4060 as main,some people say that Can not find it. Today I would like to introduce another interesting cycle, because the transistor. It is certainly easy to buy. And also […]

 Non contact ac detector voltage tester using CD4060

Sunday, April 6th, 2014

Tools that features equivalent of a professional, easy to use, cheaper, and more importantly, safe for use. For checking to find AC 220 Volt or 120V or call that AC main power in various points have or not? Most use a screwdriver to check the electricity. It is a lightweight, easy to carry. But the […]

 The telephone line status indicator

Tuesday, January 14th, 2014

This is a telephone line status indicator to prevent the hearing others talk on the phone accidentally and a Protection to making phone calls simultaneously. The telephone is a communication device that enables to communicate to each other, although it is far or near. Formerly, one phone number. Be used with only one phone. But […]

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