Articles, Battery, Circuit, Components, Design, Electronics, Electronics Theory, Hobby Circuits, Home, Home Circuits, How components work, Power Supply, Techniques, Utility Gadgets

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

Continue reading “LED Panel Emergency Lamp. Home Utility Circuit 21”

Advertisements
Articles, Circuit, Components, Design, Electronics Theory, Hobby Circuits, Home Circuits, How components work, Power Supply, Utility Gadgets

Mains Tester cum Night Lamp. Home Utility Circuit 20


MAINS-MONITOR-2Here is a dual purpose LED light powered directly from 230V AC. It indicates whether power is available or not in the Three pin socket. Its second function is that, it is a very good Night lamp giving sufficient light in the room. If it is plugged in the Mains box, it shows whether domestic power supply is present or not and also gives light in the Mains box to work in night. Its cost is just Rs. 15.

Designed and developed by D.Mohankumar

Continue reading “Mains Tester cum Night Lamp. Home Utility Circuit 20”