Development of automatic solar powered scarecrow with rat repellant machine/ Lawrence A. Capistrano, Ehler John D. Macatangay, Luis Jr. D. Mangampo, Ronnie R. Panoted, and Grace C. Ratio.--

Bachelor's Thesis

College of Industrial Technology.-- Bachelor of Technology major in Electronics Engineering Technology: Technological University of the Philippines, 2025

Includes bibliographic references and index.

While scarecrows are commonly used to deter birds and animals from crops, they are static
and ineffective in responding to changing conditions. Farmers typically place scarecrows
in fields to ward off pests, but these devices do not react when birds or animals approach.
This study, titled "Development of Automatic Solar-Powered Scarecrow with Rat Repellent
Machine," aimed to enhance crop protection by addressing the limitations of traditional
scarecrows. This project introduces an innovative approach by incorporating modern
technology into the scarecrow design. A Passive Infrared (PIR) sensor is used to detect the
presence of birds and animals, triggering the scarecrow to activate mechanical motions
such as moving its arms up and down. In addition, a horn alarm is sounded to further scare

off pests. The system is powered by solar energy, making it both sustainable and cost-
effective. This combination of motion detection, movement, and sound significantly

increases the effectiveness of the scarecrow while conserving energy. By incorporating
these features, this automatic, solar-powered scarecrow offers an efficient and eco-friendly
solution to protect crops from pests, improving overall agricultural productivity and
reducing reliance on chemical deterrents.
Keywords: automatic scarecrow, solar-powered, crop protection, PIR sensor, pest control,

rat repellent, agricultural productivity, motion detection, sustainable technology, eco-
friendly, scarecrow design.