Application Of Ba0.5Sr0.5TiO3 (Bst) Film Doped With RuO2 (0%, 2%, 4% and 6%) On A Rice-Stalk Cutting Robot Model Based On A Line Follower With Hc-05 Bluetooth Control

Abstract

Ba0.5Sr0.5TiO3 (BST) film doped with RuO2 with varying concentrations (0%, 2%, 4%, and 6%) on a p-type (100) silicon substrate has been successfully grown using the Chemical Solution Deposition (CSD) method and spin coating at a rotational speed of 3000 rpm for 30 seconds. The film on the substrate was then heated at 850 oC for 15 hours. BST film+RuO2 variations were characterized for their sensitivity as a light sensor. BST film+RuO2 variations were tested with a varied light source and reflective surface colors. Thin films have a range at the visible light wavelength, so LED lights were used as the light source in the present study. The light source selected was the blue LED because it had a high contrast in differentiating between dark and light-colored surfaces. Various electronic circuits assisted sensitivity characterization with the aim to produce a sensor that is highly sensitive to light. The response of BST film+ RuO2 variations differed according to the RuO2 doping concentration. BST film doped with RuO2 6% had a very good response to changes in light, so this film was applied as the line detector sensor in the line follower-based rice-stalk cutter model with an HC-05 Bluetooth control. Before being integrated with the microcontroller, the output voltage of the BST film was strengthened using an op-amp circuit so that the microcontroller could read the output voltage of the BST film.