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Light Tracker Bot

Arduino interfaced with a couple of photo resistors (LDR), mounted over servo motor tracks light and makes an angular motion toward it.

Light Tracker Bot:
The operation is based on the photoconductive property of Light Dependent Resistors (LDRs). LDRs are semiconductor devices whose electrical resistance changes in response to the intensity of incident light. When exposed to light, the LDRs generate varying analog voltage signals proportional to the ambient light levels they receive. The bot employs two LDRs, strategically positioned to sense light from different angles. By measuring and comparing the analog voltage outputs from the LDRs, the bot can determine the direction of the strongest light source. This comparison helps the robot ascertain whether the light source is to its left, right, or directly in front of it.

To respond to the light source’s direction, the bot’s servo motor comes into play. The servo motor is mechanically connected to the LDRs, allowing it to move horizontally. The robot is programmed to smoothly adjust the servo motor’s position based on the difference in analog readings from the two LDRs.

As the LDRs sense changes in light intensity due to any movement of the light source, the robot’s control algorithm continuously adapts the servo motor’s position, keeping the light source within its field of view. This mechanism allows the Light Tracker Bot to precisely follow the light source, making it an intelligent and engaging light-tracking robot.

Real life Implementations:

1.) Solar Panel Orientation: It can be employed in solar panel installations to optimize their orientation, ensuring they are always aligned with the sun’s position for maximum energy generation.

2.) Automated Plant Growth: Can be used in indoor gardening setups to move artificial light sources, ensuring plants receive the ideal amount of light for their growth at different stages.

3.) Smart Lighting Systems: In smart homes or offices, it can control motorized curtains or blinds, adjusting their position based on the sun’s movement to regulate natural lighting inside the space.

4.) Security and Surveillance: In security applications, the bot could detect light sources and trigger alerts or actions, enhancing the capabilities of surveillance systems.”

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