Pengukuran kuat penerangan cahaya berbasis komputer

Abstract

Telah dirancang sebuah alat ukur kuat penerangan cahaya berbasis komputer. Sistem ini digunakan untuk mengukur kuat penerangan cahaya dengan masukan nilai kuat penerangan date basil pengukuran ditampilkan dalam layar monitor claim bentuk angka numerik. Perangkat kerns sistem terdiri atas sensor kuat penerangan (photodioda), penguat operasional UA 741, ADC 0809, PPI 8255, dan personal Computer. Untuk mengendalikan proses bekerjanya alai ukur kuat penerangan ini digunakan dengan memakai bahasapernrogaman pascal. 7.0. Hasil uji tranduser kuat penerangan menghasilkan persamaan regresi tinier Y = (4, :16 X — 7.70). 10 -5 dengan variansi = 4.5. 10'5, uji fungsi penguat UA 741 menghasilkan penguatan 490 kali defigan persamaan regresi tinier Y = (2,07 X — 1.31) -/ -3 .10 dengan variansi = 0.18 , uji Ringsi konversi ADC menghasilkan persamaan regresi Y = Y = 51.57 X + 0.51, dengan variansi = 0,21, uji. PPI menghasilkan bahwa alat mampu mengubah sesuai masukan dengan tepat, dan dari uji sistem secara. terpadu alat mampu menampilkan nilai kuat penerangan dari 0 — 240 lux' dengan persamaan regresi limier Y = 1,00 X+ 0,70 variansi 3,61 dan ketelitian 0.94 lux-, An instrument measure for ilumenance of light based on computer_has been designed and realised. This system Used for measure ilumenance of light by means of entered proportion ilumenance of light and then out come of the measuring bring forward to show into monitor have the shape of numeral Hardware of this system is composed of a photodioda as sensor ilumenance of light, an operational amplifier UA 741, an analog to digital circuit 0809, a programmable peripheral interface and personal computer. To control this instrument process was used programming language pascal version 7.0. Experiment crop of the transducer iltunenance give linear regression equation Y = (4, 16 X --7.70). 10 variance .= 4.5. 10.5 , amplifier UA 741 function test give in 490 and linear regession equation Y = (2,07X — 1.31). 10' with variance = 0.18 -3 conversion function test ADC give 'linear regression equation Y = 51.57 X + 0.51, with variance = 0.21, PPI test give that instrument capable to change input suitable, and form" system test be firmly united instrument able to show proportion of ilumenance of light form 0 - 240 with linear regression equation Y =1.00 X + 0,70, variance = 3,61 and 0.94 lux,- in accuracy. This document is Undip Institutional Repository Collodion. • The althor(s) or copyright owner(s) agree that UNDIP-IR may, without changing the content, translatti the I submission to any medium or format for the purpose:of preservatio)n. The author(s) or copyright owner(s) also agree that UN DIP-IR may keep more than one copy of this : • • ; submission for purposes of security, back-up and preservation. ( http://eprintsi:uii ndip.ac.id) • '