Browsing by Author "Setiadi, R. N."

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    DESAIN SISTEM PENDETEKSI POSISI VERTIKAL DAN HORIZONTAL SINAR LASER MENGGUNAKAN QUADRANT PHOTODETECTOR (QPD)
    (2014-03-26) Yunus, M.; Minarni; Setiadi, R. N.
    A detection system of vertical and horizontal position using a Quadrant Photodetector (QPD) has been designed and made. The system consists of four level, i.e a QPD, an integrator circuit as current to voltage converter, summing and divider circuits, and a circuit of signal output X and Y. A quadrant photodetector is placed on a translation stage than can be arranged vertically (y) and horizontally (x) in a interval of millimeter. Positions of the laser beam are varied vertically and horizontally on the QPD so that output voltage of each segment of the QPD, integrator and output voltage X and Y can be observed. The positions of X and Y measured are plotted to x and y that are varied manually. The relation indicated a linear. For all segment of QPD the bigger segment of QPD that is irradiated by the laser beam then the larger output voltage is generated. The values of output voltage and will decrease when x position increasingly towards the negative, while the values of output voltage and will be increased. This is due to the laser beam diameter on the surface of A and B it gets smaller while on the surface C and D it gets larger when the x position is changed manually from the position -1,5 mm  x  1,5 mm. The position of y is changed manually from the position -1,5 mm  y  1,5 mm then the values of output voltage and will decrease when y position increasingly towards the negative, while the value an output voltage and will increase because the laser beam on surface of C and B it gets larger while on the surface A and D ist gets smaller
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    PERANCANGAN SISTEM MONITORING MULTI SENSOR UNTUK EKOSISTEM ZONATERISOLIR BERBASIS MODUL GSM/GPRS+GPS SIM508
    (2014-03-26) Prayitno, Y.; Umar, L.; Setiadi, R. N.
    A monitoring design for isolated zone ecosystem based on GSM GPRS + GPS SIM508 has been successfully carried out. The monitoring system consists of several subsystems. They are multi sensor system, microcontroller, data transmission, and autonomous energy system which are integrated each other, and be able to provide information in the form of physical quantities. This system was designed to work automatically using an ATmega8535 microcontroller in order to control the whole system. In order to detect physical quantities i.e temperature and humidity, a series of multi sensors used a SHT75 sensor and a LM35DZ sensor that had been calibrated and characterized. Results of the sensor system readings were converted by a microcontroller of ATmega8535 before it was sent to the SIM508 module. SIM508 module was used as data transmitter. Testing of the monitoring system was done using a Hyperterminal. Results provided the information of temperature, humidity, time and location. There information were sent by the monitoring system via short message service (SMS) to Mobile Phone. The monitoring system works well and has a high degree of accuracy