Three Pin Socket Tester. Home Utility Circuit.19


3We use a number of Three Pin Sockets in our home. It has three connections- Phase, Neutral and Earth. Earth connection is an important safety measure to bleed the leakage current if any from the device using. In a Metal bodied device, if there is current leakage, there is the possibility of shock hazard . So the Earth connection should be intact to bleed the leakage current. How can we check whether the Earth connection is intact or not. The AC Tester check will not give the result because there is no current in Earth line. No problem, this tiny circuit will confirm whether the Earth connection is intact or not. The Green LED lights if the earth connection is intact, otherwise not. It is too simple, and can be enclosed in a Three Pin Socket itself.
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Mains Flasher. Home Utility Circuit 12


1CImagine how much electricity wastage occurs when the Electric Iron or Water heater left switched on for many hours unknowingly after the use. Don’t worry; hook up this tiny circuit in the existing Socket where the device is connected. It will flash brilliantly and reminds you to switch off the device after its use. Its cost is just Rs.10 but it saves hundreds of rupees. Probably, this is the simplest LED Flasher that operates in Mains. Check it
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LED Bulb Hacked. Home Utility Circuit 8


LED-BULBWe all use LED bulbs today to save energy. Different types of LED bulbs ranging from 3 Watts to 15 Watts are now available at low cost. The LED bulb has an array of serially connected 0.5 watt Chip LEDs and a small capacitor power supply. We can also easily make the LED bulb. Let us see what is inside the LED bulb and the circuit operating it.
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Smart Solar Charger. Design Note 31


IMAGEYou can make a simple Current regulated Charger for your Solar Panel. It safely charges the 12 volt battery with a constant current of 540 Milli Amperes. It needs only a few components and can be hooked between the Solar panel and the battery. It also has an LED charge indicator and a revere polarity protection diode.
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