PESTICDE DETECTION DEVICE BASED ON LIGHT REFLECTION RESPONSE WITH A CERTAIN WAVELENGTH HARDWARE DESIGN AND IMPLEMENTATION OF PESTICIDE DETECTION DEVICE BASED ON LIGHT REFLECTION RESPONSE WITH A CERTAIN WAVELENGTH

• Main Author: Setiawan - NIM : 13214034 , Ferriady
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27302
• Institution: Institut Teknologi Bandung

<p align="justify">Many Farmers in Indonesia use pesticides to protect agricultural produce from disruption of pests that can reduce yields. But many farmers use excessive amounts of pesticides. It causes pesticide residues left in the vegetables eaten by humans. Pesticide residues if ingested by humans in suffICient quantities will cause health problems in humans. The presence of pesticide residues in vegetables consumed by humans is caused by irresponsibly excessive use of pesticides by farmers. The most common method used to detect the presence of pesticide residues in vegetables is gas chromatography or HPLC (High Performance Liquid Chromatography). However, this method is destroyed and invasive to vegetables. By using this technique, the vegetables will be extracted and distructed to be analyzed for the existence of the pesticide residue. So, after testing is complete, the vegetables can not be eaten again even if the test results show no pesticide content in vegetables. Pesticide Detector Device PESTOR is a tool that serves to see the difference in voltage from light reflections that are read from photodiode. This difference in voltage arises because of differences in light reflection of vegetables before and after sprayed with pesticides. PESTOR is a Device for detecting non-destructive and non-infectious pesticides on vegetables. This Device is also portabel. <br /> <br /> <br /> In this final project, hardware of PESTOR detection system consists of power supply subsystem, microcontroller, pesticide sensor, signal conditioner, and communication module. This pesticide detection Device uses a rechargeable battery as a power supply. This battery must have a capacity that can power the Device for 6 hours in stand by. The microcontroller is used to process the voltage signal from the photodiode and the voltage from the battery to produce the percentage of residual battery voltage. The result of voltage readings from light reflections of vegetables before and after being sprayed with pesticides is displayed using applications on the smartphone. This data transmission will be done wirelessly using bluetooth module. <br /> <br /> <br /> The results of the test show that PESTOR can be used to see the difference of voltage from light reflection between vegetables before and after sprayed with pesticide. This PESTOR Device can last for 6.5 hours in stand by state. The Device can be recharged if the battery is discharged. The Device also has a precision rating of more than 95% sensor readability. <p align="justify"> <br />