Automatic emergency light pdf

A low cost LED Emergency Light circuit schematic and diagram based on white LED,which provides bright lights. Automatic emergency light pdf is a popul

A low cost LED Emergency Light circuit schematic and diagram based on white LED,which provides bright lights. Automatic emergency light pdf is a popular LED light circuit with an automatic battery charger.

Looking for Latest Electronics Project Kits? We have developed three circuits under Automatic LED Emergency Light. We have listed the circuits here for your ease of  reading. Similarly it senses day light and turns OFF automatically. Any individual who can do a good quality soldering must be able to build this circuit successfully. This can be easily accommodated in the defunct two 6 watt tube National Emergency Lamp or any PL tube type emergency lamp. Deep discharge is taken care by the LED characteristic and over charge protection is taken care by the fixed voltage regulator.

This uses a simple 3Pin fixed regulator which has a built in current limiting circuit. The 5mm LDR is just mounted on top of the emergency light as shown in the photograph. 2 LEDs light up with current that is required for a single LED,  by which energy is saved to a great extent. This particular circuit has been kept so simple for people who has limited access to components or in other words this is an emergency light that you can build with minimum components. In addition to circuit diagram, He has shared photographs of the prototype he made in National emergency light and a PCB design. This is the circuit diagram of a low cost emergency light based on white LED.

The white LED provide very bright light which turns on when the mains supply is not there. The circuit has an automatic charger which stops charging when the battery is fully charged. The IC LM 317 produces a regulated 7 V for the charging of Battery. Transistor BD 140 drives the out put. Transistor BC 548 and Zener diode controls the charging of the battery.