Application of lithium tantalate (LiTaO3) films as light sensor to monitor the light status in the Arduino Uno based energy-saving automatic light prototype and passive infrared sensor. (17th February 2018)

• Record Type: Journal Article
• Authors: Irzaman, ; Siskandar, Ridwan; Nabilah, Nida; Aminullah, ; Yuliarto, Brian; Hamam, Kholoud Ahmed; Alatas, Husin
• Is Part Of: Ferroelectrics. Volume 524(2018)
• Page Start: 44
• Page End: 55
• Publication Date: 2018-02-17
• Subjects: Lithium tantalate (LiTaO3) film -- infrared passive sensor -- real time clock -- Arduino Uno -- GSM; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2018.1432842
• Languages: English
• ISSNs: 0015-0193

Abstract

ABSTRACT: Growth of LiTaO3 film on a type-p silicon substrate (100) was conducted using the Chemical Solution Deposition (CSD) and spin coating methods at a speed of 3000 rpm for 30 seconds. The film on the substrate was then heated at 850 o C for 15 hours. The resulting film was then characterized for its sensitivity value. The film was utilized as a light sensor to read changes in light intensity to monitor lighting status in an Arduino Uno-based energy-saving automatic light prototype. Previously, the output of the film in the form of an electrical voltage was strengthened using a voltage amplifying circuit (OP-Amp). The energy-saving automatic light prototype was manufactured in two conditions, an automatic condition (with assistance from an infrared passive sensor and real time clock) and a manual condition (with assistance from a GSM to control the lighting and LiTaO3 film as a light sensor to monitor the lighting status). In the automatic condition, the assessment of the infrared passive sensor's sensitivity was conducted at distances of 0 m, 0.5 m, 1 m, 1.5 m, 2 m, 2.5 m, and 3 m at angles of 0 0, 30 0, 45 0 and 60 0 (the source of motion was human movements). The real time clock was used to regulate the infrared passive sensor activation time (7 a.m to 5 p.m Western Indonesia Time). In the manual condition, when entering manual time (outside the 7 a.m to 5 p.m Western Indonesia Time range), to be exact, the GSM would send a message containing the duration of the lighting usage and the cost of the lighting usage. Activation of the lighting was conducted by replying to the message with the code #1 to turn on the lighting and #0 to turn it off.