Design of birds detector and repellent using frequency based arduino uno with android system

Indonesia is an agrarian country. Many Indonesians work as farmers to survive. Plants are related to pests, where there are plants there must be pests. Pests are animals that damage the plants. One example of pests that eat plants and harm is birds. This research has developed and designed prototype detector and repellent of birds. The prototype has a motion detection system which then proceeds to a repellent that generates a certain frequency, so the bird will be disturbed. This prototype consists of PIR sensors as a detector to detect movement from birds and using LC oscillator type colpitts with Piezo Ultrasonic sensor as repeller. The results of the experiment are the PIR sensor working with a detection distance between 0 cm-500 cm, and the bird will be disturbed at a frequency signal of about 60 kHz.