Alat Ukur Intensitas Cahaya dengan Menggunakan Sensor LDR Berbasis Mikrokontroler AT Mega 8

Abstract

An instrument prototype for visible light intensity measurement has been designed and fabricated for the purpose of final project to obtain ahli madya Metrology and instrumentasi Universitas Sumatera Utara . The instrument is mainly supported by microcontroller at mega 8 system as the measurement data processing center. Further more the result of the measurement processing is displayed on LCD screen. To obtain the light intensity measurement data, it is required an instrument system which consists of microcontroller system, light dependent resistor (LDR) circuit to detect light intensity and convert it to analog voltage, and analog to digital converter (ADC) to convert from LDR circuit to be digital measured data for microcontroller. Furthermore, the microcontroller will prosess and calibrate the measurement data and dispays the data to the ouptut screen.