Nurmalia Nasution, 0817041007 (2015) IMPLEMENTASI SENSOR FOTODIODA SEBAGAI PENDETEKSI SERAPAN SINAR INFRA MERAH PADA KACA. Fakultas Matematika dan Imu Pengetahuan Alam, Universitas Lampung.
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Abstract
ABSTRAK Telah dilakukan penelitian mengenai implementasi sensor fotodioda sebagai salah satu jenis sensor cahaya untuk mendeteksi sinar infra merah yang diserap oleh kaca. Jenis kaca yang digunakan kaca bening dan kaca transparan berwarna (hitam, hijau, dan biru) dengan tebal 2 mm sampai 8 mm. Sistem ini terdiri atas sensor fotodioda, LED infra merah, kaca, catu daya, sistem minimum mikrokontroler ATMega8535, rangkaian penguat IC324, dan software Bascom AVR. Kaca sampel diletakkan di antara sensor fotodioda dan LED infra merah. Keseluruhan sistem bekerja dari tegangan keluaran sensor yang menjadi masukan pada port A.0 mikrokontroler dan diubah menjadi sinyal digital oleh ADC. Hasil penelitian menunjukkan sensor fotodioda memiliki respon baik untuk mendeteksi intensitas dari LED infra merah. Perbandingan antara intensitas awal dan intensitas akhir yang diterima oleh sensor cahaya fotodioda digunakan untuk mengukur nilai serapan sinar infra merah pada kaca. Serapan terbanyak pada kaca hijau 8 mm (20,848%) dan terkecil pada kaca bening 2 mm (0,029%). Semakin tebal dan gelap kaca yang digunakan semakin banyak sinar infra merah yang diserap, begitu juga sebaliknya semakin tipis dan terang kaca yang digunakan semakin sedikit sinar infra merah yang diserap. Kata kunci: sensor fotodioda, LED infra merah, serapan, kaca. ABSTRACT The research was conducted the implementation of photodiode sensor as light sensor to detect the infrared ray had absorbed by glass. The type of glasses were clear glass and transparent colored glass (black, green, and blue) with the range thickness was 2 mm to 8 mm. This instrumentation system consisted of a photodiode sensor, infrared LED, glass, power supply, a minimum system of ATMega8535 microcontroller, IC324 an amplifier circuit and Bascom AVR software. The sample glass was put between the photodiode sensor and infrared LED. The whole system works from the sensor output voltage which becomes the input of port A.0 microcontroller. The microcontroller converted analog signal to digital by ADC. The result of this research showed that the photodiode sensor has a good response to detect the intensity of infrared LED. The ratio between initial intensity and final intensity received by photodiode light sensor was used to measure the value of infrared ray absorption on glass. The highest absorption was obtained on 8 mm green glass (20,848%) and the lowest on 2 mm clear glass (0,029%). The thicker and darker the glass used the more infrared rays were absorbed,vice versa with the thinner and brighter the glass used the less infrared rays were absorbed. Keyword: photodiode sensor, infrared LED, absorption, glass.
| Item Type: | Other |
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| Subjects: | T Technology > T Technology (General) |
| Divisions: | ?? Fisiska ?? |
| Depositing User: | 4262948 . Digilib |
| Date Deposited: | 03 Mar 2015 01:27 |
| Last Modified: | 03 Mar 2015 01:27 |
| URI: | http://digilib.unila.ac.id/id/eprint/7562 |
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