PERANCANGAN SISTEM KONTROL OTOMATIS LAMPU PENERANGAN PADA JANGKA WAKTU 24 JAM BERBASIS MIKROKONTROLER AT89S51

Has successfully created a tool Automatic Lamp Illumination Control System based on Microcontroller AT89S51. This tool is used to turn on and dim the lights in the room. The series of Automatic Lamp Illumination Control system based on Microcontroller AT89S51 can  turn on lights automatically. NSL19_M51 LDR as a sensor. Lights lit up at 19.00 - 24.00 with the intensity of 020 lux, the intensity is 001 lux dimmest occurred at 06:00 hours. This is in accordance with the principle of LDR in a state where the light resistance of the LDR is smaller then a small voltage and the lights dimmed, if in the dark resistance of the LDRvoltage is large and bright lights

RANCANG BANGUN ALAT PENDETEKSI KETINGGIAN KOLOM CAIRAN INFUS MENGGUNAKAN SENSOR POTENSIOMETER DAN BERBASIS MIKROKONTROLER AT89S52

It has been made a detector of the column height of the infusion fluid using by potensiometer sensor based on AT89S52 microcontroller. This detector was compiled by potensiometer, ADC0804, microcontroller AT89S52, seven segment, buzzer, and LED. The infusion fluid that used to calibrate the potensiometer sensor and the device’s working system was Otsu-NS infusion, while the infusion fluid that used to examine the device’s working system were aminovel infusion and NaCl infusion. The results of the present research were the device has conformity between system and aminovel infusion was 99.69% and 98.75% for NaCl that gained from linear regression analysis of device’s calibration data