Monday, November 19
AUTOMATIC LOW-POWER EMERGENCY LIGHT
Here is a white-LED-based emergency light that offers the following advantages:
1. It is highly bright due to the use of white LEDs.
2. The light turns on automatically when mains supply fails, and turns off when mains power resumes.
3. It has its own battery charger.
When the battery is fully charged, charging stops automatically.
The circuit comprises two sections:
charger power supply and LED driver.
The charger power supply section is
charging current through diode D5
and limiting resistor R16. By adjusting
preset VR1, the output voltage can be
adjusted to deliver the required charging
current.
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Emergency lighting plays a very crucial role when it comes to safety. Most commercial complexes, theatres and hotels make it a point to have emergency lights.
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