HB-LED flashing beacon repurposes switching regulator

This flasher/beacon circuit can be employed as a distress signal on highways, a direction pointer for parking lots, hospitals, and hotels, etc. The circuit uses a power LED, and provides more light than a typical incandescent lamp flasher. Use of a 6V or 12V SLA lantern battery makes the circuit portable.

HB-LED flashing beacon repurposes switching regulator

The heart of the circuit is an MC34063 monolithic switching regulator subsystem, originally intended for use in DC-DC converters. This device contains a voltage reference, comparator, controlled duty cycle oscillator with an active peak current limit circuit, driver, and a high current output switch, all in an 8-pin DIP.

The circuit briefly flashes a 1W power LED from a 6V to 12V DC supply – at about 5% duty-cycle. Current limiting to the LED is accomplished by monitoring the voltage drop across R1, a 1Ω sense resistor placed between VCC and the output switch, pin 1.

 

For more detail: HB-LED flashing beacon repurposes switching regulator


About The Author

Ibrar Ayyub

I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation and engineering. My writing style is clear and simple, and I am skilled in using infographics and diagrams. I am a great researcher and am able to present information in a well-organized and logical manner.

Follow Us:
LinkedinTwitter
Scroll to Top