Judul: Disain dan Uji Teknis Alat Pengukur Kekuatan Tarik bahan Kemasan Dengan Menggunakan Mikroprosesor Tipe MC 6802 D5
Abstrak: Alat pengukur kekuatan tarik bahan kemasan dengan menggunakan mikroprosesor ini merupakan salah satu alternatif gagasan penerapan teknologi elektronika dalam pembuatan dan pengembangan alat-alat pengukur sifat-sifat bahan kemasan. Alat pengukur kekuatan tarik bahan kemasan adalah unit pengukur besarnya nilai ketahanan suatu jenis bahan kemasan (beberapa jenis plastik dan kertas) terhadap gaya tarik yang diberikan kepadanya. Alat pengukur kekuatan tarik bahan kemasan ini terdiri dari 6 bagian utama, yakni 1) sistem pencatu daya, 2) sistem mekanis (alat penarik), 3) sistem analog, 4) sistem konversi analog ke digital (ADC), 5) sistem pengolah mikro (mikroprosesor), dan 6) sistem peraga (display). Unit pengindera adalah rangkaian pengukur regangan (strain gauge) yang mendeteksi besarnya gaya tarik berdasarkan metode jembatan Wheatstone, yaitu dengan cara mengubah besaran mekanis menjadi besaran listrik (analog). Selanjutnya besaran listrik ini diubah menjadi besaran digital dengan menggunakan sistem ADC berdasarkan sistem konversi 'successive aproximation'. Unit pengolah data digunakan untuk mengolah dan menghitung data (besaran digital) yang dikeluarkan oleh ADC dan sebelumnya sudah diprogram sesuai tujuan pengukuran yang diinginkan. Unit ini menggunakan mikroprosesor tipe MC 6802 D5 (motorolla). Unit peraga yang digunakan adalah seven segmen yang terdapat di dalam unit pengolah mikro (mikrokomputer), atau menggunakan printer yang dihubungkan ke PIA (Peripheral Interface Adapter) maupun ACIA (Asynchronous Communication Interface Adapter), atau dapat menggunakan terminal (moni- tor CRT). ...
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Judul: Desain Penetrometer Digital Berbasis Mikrokontroler ATmega 8535
Abstrak: Until recently, most of soil strength measuring instrument still use spring scales penetrometer such as mechanical penetrometer. Mechanical penetrometer was difficult to use and has recording in accuracy because manual reading of spring scales and distance simultaneously. Moreover, mechanical penetrometer need three operator for operation. Therefore, digital penetrometer was developed to solve this problem. Penetrometer digital consists two main components : a electronics components and a mechanical components penetrometer. A mechanical component consists of a handle ring tranducer, penetrometer rod, and cone. Electronic components consists of sensor temperature LM35, strain gage, depth sensor , amplifier, microcontroller ATmega 8535, LCD screen, and battery 9 volts. Methodology use in this research was engineering design based on functional and structural design. Ergonomic of the developed digital penetrometer were condidered based on the Indonesians average anthropometries. Measurement principles the digital penetromter consist of: Compressive force was measured using strain gage sensors mounted on the ring transducer. Shinkage ring transducer strain gage sensor response by the form of the resistance value, because it is too small it takes amplifier, then processed by the microcontroller to be converted into units of kgf. Depth data obtained using ultrasonic sensors ranger. Ultrasonic signal transmission on soil will be reflected and received again by ultrasonic. From measuring the reflection will be further processed by a microcontroller and converted into units of cm. The data read by the LM35 temperature in the form of resistance. After that, change the resistance of the voltage to the microcontroller unit Celsius degree. The third sensor measurement results will be displayed through the LCD and stored in the EMS flash memory. Dimension of the digital penetrometer was 94 cm length, 12 millimeters rod diamater. Penetration of the developed penetrometer was done manually, while measurement of force was done by ring transduser, while depth of penetration was measured by ultrasonic sensor. Result of measurment was displayed on the LCD screen and recorded on EMS data flash memory.
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Judul: Etno-ornitologi Burung Kancilan Flores (Pachycephala nudigula nudigula Hartert 1897) pada Masyarakat Lio di Taman Nasional Kelimutu
Abstrak: Bare-throathed whistler is one of several wild birds in Kelimutu National Park (TNKL) that is believed to have correlation with Lio Community‟s belief. The estimation of Bare-throated whistler‟s population in Kelimutu National Park was about 186.41-1668.07 individual by the density about 0.0389-0.3481 ind/ha with the sex ratio 6.2:1 that spreaded on area with height of 1100 – 1600 masl. The characteristic of Bare-throated whistler‟s habitat is a natural forest with various canopy level, high plant species diversity and high density. The habitat characteristics related to the availability of food in the form of insects, cover, safety and a nesting site. Generally the most of Lio community knew the existence of Bare-throated whistler directly or from their parents‟ stories. The perceptions of Lio Community to the Bare-throated whistler‟s existence is generally support the conservation efforts. The perceptions construct the Lio Community‟s atitude that tend to be conservative to the existence of Bare-throated whistler. The attitude shown by their behavior that not cathing the Bare-throated whistler from the TNKL‟s area or the outside. The attitude have an important role to the existence of Bare-throated whistler in Kelimutu National Park‟s area.
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