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INDONESIA
Pillar of Physics: Jurnal Berkala Ilmiah Fisika
Published by Universitas Negeri Padang
ISSN : 23379030     EISSN : 26852608     DOI : http://dx.doi.org/10.24036/10741171074
Core Subject : Science,
Earth & Planetary Sciences Materials Science & Nanotechnology Physics
This journal publishes original articles on the latest issues and trends occurring internationally in: 1 Geophysics, 2 Electronics and Instrumentation, 3 Material Physics, (4) Computational Physics. Other topics are related to physics are most welcome.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 12 Documents
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Search results for , issue "Vol 12, No 1 (2019)" : 12 Documents clear
Pembuatan dan karakterisasi listrik keramik ZnFe2O4 dengan doping TiO2 untuk termistor NTC dengan teknik pressing (Fabrication and electrical characterization of ZnFe2O4 ceramics with TiO2 doping for NTC thermistors by pressing techniques) Anesa Filda Khairani; - Ratnawulan
PILLAR OF PHYSICS Vol 12, No 1 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.638 KB) | DOI: 10.24036/6315171074

Abstract

Pembuatan dan Karakterisasi Listrik Keramik ZnFe2O4 dengan Doping TiO2 untuk Termistor NTC dengan Teknik Pressingtelah dilakukan. Penelitian ini merupakan penelitian eksperimen dengan metode yang digunakan adalah reaksi zat padat (solid state reaction ). Serbuk Fe2O3 dan ZnO dilarutkan kemudian dicampurkan. Campuran kemudian diendapkan menggunakan amoniak 10%. Hasil endapan kemudian dikeringkan pada suhu 100oC selama ± 6 jam, kemudian dikalsinasi pada suhu 500oC selama 1 jam. Serbuk ZnFe2O4 dicampur dengan serbuk TiO2 kemudian digerus hingga homogen selama ± 1 jam. Campuran kemudian dipress dengan tekanan 50 ton/cm2 hingga membentuk pelet pada cetakan berdiameter 8 mm. Pelet tersebut disinter pada suhu 1100oC selama 2 jam di dalam tungku dengan atmosfer udara. Pelet hasil sintering dilapisi perak untuk pembuatan elektroda. Hasil pengukuran tahanan listrik, nilai konstanta termistor adalah  K, dari keramik berbasis ZnFe2O4 dengan doping TiO2 yang dibuat memenuhi kebutuhan pasar.
Studi awal rancangan alat colorimeter menggunakan sensor OPT101 untuk menentukan serapan ekstrak pewarna alami berbasis mikrokontroler arduino (Preliminary study of the colorimeter design using OPT101 sensor to determine the absorption of natural dye extracts based on the Arduino microcontroller) Puja Kahar; - Yulkifli; - Ramli
PILLAR OF PHYSICS Vol 12, No 1 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1166.17 KB) | DOI: 10.24036/6252171074

Abstract

Colorimeter is a color measuring instrument used to measure the amount of output voltage produced by each different dye. The dyes used here are red and orange color dyes as the beginning of the experiment. The samples used can be used in hazardous and harmless coloring materials, but in this experiment using non-hazardous artificial materials. The results of the trial output are displayed on the LCD. This tool uses LED as a source of light emitted in samples that are red and orange, then captured by the OPT101 Sensor which converts light into an output voltage. The output voltage is amplified by a voltage amplifier circuit. The results of the output voltage are confirmed on the arduino which is then displayed on the LCD. The program from Arduino is programmed using Arduino software which is then compiled or sent to Arduino which is then displayed on the LCD. The results of the colormetical device were made on a 2.4 volt red sample and an orange sample of 3.13 volts. So that from the measurement results we can distinguish colors from the sample used

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