LED Panel Emergency Lamp. Home Utility Circuit 21


LED-PANEL-3

You can make an LED Emergency lamp easily using the LED Panel available now. The lamp turns on when the power fails and turns off when the power resumes. When the mains power is available, the 12 V 7.5 Ah battery charges. Since LED panel is used, the emergency light can have a back up time of many hours. You can make 9 Watt or 18 Watt Emergency lamp using the circuit presented here.Its Backup time will be 10 Hours.Its cost will be around Rs. 950. Of these, the battery alone costs Rs.800. If properly maintained, the battery will last more than 4 years.

Designed and developed by D.Mohankumar

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Solar Laptop Charger. Home Utility Circuit 17


IMAGEHere is a simple solution to charge your Laptop, Tablet, Notebook etc outdoor. A 12 V 10W Solar panel can very well charge the Laptop battery if a DC – DC Booster module is connected between the Solar panel and the Laptop battery. It is a very good charger if you go for a Picnic site where AC is not available to charge the Laptop. It is cool, make it.
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