Laser Light Activated Alarm Essay Example

has been proven to be adaptable to fit any size of doors and windows, and it can be easily operated and assembled similar to more expensive devices. However, it is recommended to conduct further tests in order to confirm its efficiency.
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On May 16, 1960, Theodore H. Maiman, a physicist at Hughes Research Laboratories in Malibu, Calif., constructs the first laser by using a 1 cm diameter and 2 cm long cylinder made of synthetic ruby. The ends of the cylinder are silver-coated to allow them to reflect and function as a Fabry-Perot resonator. Maiman utilizes photographic flashlamps as the laser's pump source.

Howard Hughes announced Maiman's achievement during a press conference held on July 7, 1960. In 1972, Bell Labs utilized laser beams to create electronic circuit patterns on ceramic materials. Then in May 2009, Chunlei Guo from the University of Rochester introduced a new technique that uses femtosecond laser pulses to enhance the efficiency of regular incandescent light bulbs. By directing the laser pulse onto the bulb's filament, nanostructures form on the metal surface and significantly improve tungsten's light emitting capability. Guo suggests that this process has the potential to reduce electricity consumption of a 100-Watt bulb to that of a 60-Watt bulb.

This is a laser alarm system resembling those seen in movies. It utilizes a laser pointer beam to safeguard your belongings and property. When the beam is interrupted by a person, animal, or object, the resistance of a photodiode increases and triggers an alarm. The laser and receiver can be placed together in a single box, sharing a power supply. The receiver's average current consumption is under

10 mA, making the laser the device that requires the most current. The diagram provides examples of a passage and an area that are protected by the alarm, with mirrors used to direct the beam as needed.

The circuit diagram contains a TL072 op-amp (IC1. A) that acts as a voltage comparator. It compares the voltage reference from the adjustable voltage divider P1/R4 with the light-dependent voltage from the voltage divider made up of photodiode D1 and fixed resistor R3. When the laser beam is interrupted, the voltage at comparator pin 2 becomes lower than that at pin 3. As a result, the output swings towards the positive supply voltage, indicating an alarm condition. This signal can be used to activate a siren, a computer, or a light in order to deter the intruder.