Perancangan Kontrol dan Monitoring Level Ketinggian Air di Waduk Bagian Hulu untuk Meningkatkan Efektifitas Kinerja PLTA Koto Panjang

Activity monitoring water levels in reservoirs hydropower Koto Panjang are generally still done conventionally, that is reading of a sign of watershed mounted on the reservoir by way of a return of the power house to a reservoir which on avarage carried done three times a day, because of that is needed design control and monitoring level of water level by using ultrasonic sensor which is controlled from long distance 50 cm minimally until 10 m. The result of reading sensor are sent to microcontroller Arduino Uno for processed and sent by HT and displayed in PC. For displaying the data which received in monitor screen use software of LabView 2012. From the result sensor testing MB7366 able controlling the water level with error presentation 0.011% which is compared with a sign of watershed conventionally in reservoir and added with high time efficiency. From the result of comparison reading water elevation, reading from ultrasonic sensor can improve plant performance 0.03%

Perancangan dan Pembuatan Prototype Catu Daya Tegangan Output Konstan Mengunakan Teknologi Konverter Step Up Kapasitas 320 Watt

Boost converter is a dc to dc converter with an output voltage is higher than the voltage enter consisting of at least two a semiconductor ( transistors and a diode ) and a coil the depositary as an element of energy .Output boost converter in tentukkan by duty cycle of pwm that where enlarged duty cycle pwm and an output voltage is boost converter will go up and vice versa sags duty cycle pwm and an output voltage is boost converter down .On this thesis was built by a boost converter that could raise its 12v dc voltage into 55v dc and capable of flow the burden until 2.21a .The signal source pwm of mikrokontroller , switch mosfet use , inductance an air core and a diode use a kind of fast recovery to keep the level of voltage in useprisoners as a voltage divider befungsi as a series of feedback from output boost converter adcmikrokontroller to

Rancang Bangun Modulator FM

FM modulator is a device used for the modulation process. Modulation is a process to lay the information signal on carrier signal for reduce interference and noise when signal ispropagated. The information signal has 3,4 KHz in frequency , and will be modulated with 19 KHz (carrier signal). FM modulator is designed with PLL (Phase Locked Loop) method, itused the concept of phase signal locking . FM modulator with PLL method consist of four blocks, that is oscillator colpitt, phase comparator, second orde LPF butterworth and VCOwienbridge. Design of FM modulator trainer begins with calculate to determine the component value which suitable with cut off frequency. The next process to make the layoutof the pcb board, dissolution layout, pcb board drilling, mounting the female connectors to pcb board, installation of component connectors to the header, and make a box to placetrainer FM demodulator. The results obtained at each signal fm demodulator block is different. The modulated signal is obtained at the VCO wienbridge

Rancang Bangun Web untuk Pengontrolan Arah Putaran Motor secara Online dan Realtime

WEB this particular internet technology can be used to overcome distance remote control system. In this case theauthor uses an object-oriented programming language is Visual Basic 6. For system expansion, it would be better touse a programming language that supports WEB such as ASP, Java or PHP. So that this system can be developed byutilizing Web-based HTTP.Keywords;Internet, WEB, DC motor

Rancang Bangun Demodulator FM

FM demodulator is used to demodulate signal in FM receiver. Demodulation process is performed to recover the information signal. The information signal is 3.4 kHz which ismodulated with a carrier signal of 19 kHz. FM demodulator is designed with PLL (Phase Locked Loop) method, it used the concept of phase locking signal. FM demodulator withPLL method consist of four blocks, that is phase comparator, second-order Butterworth LPF, VCO wienbridge, and buffer amplifiers. Design of FM demodulator trainer begins with calculate to determine the component value which suitable with cut off frequency. The next process to make the layout of the pcb board, dissolution layout, pcb board drilling, mounting the female connectors to pcb board, installation of component connectors to the header, and make a box to place trainer FM demodulator. The results obtained at each signal FM demodulator block is different. Demodulated signal is obtained at the buffer amplifier block, where the signal is same as the output signal at function generator is 3.4 kHz

Perancangan Software Interface Pengendalian Lampu Lalu Lintas Simpang Lima Berbasis Mikrokontroller Atmega 8535

Design software interface controlling traffic light intersection ATMega8535 five-basic microcontroller is design to facilitate operator traffic light. This software design involves two different software,software Visual Basic 6.0 and CodeVision avr, Visual Basic 6.0 as a software interface that will send data and CodeVision avr as recipient of the data that is in its hardware. Sending and receiving data here using the existing serial port in komputere that use serial usb rs232 which serves to connect or bridge the respective software sendiri.Pengiriman data through the interface that Visual Basic 6.0, this shipment using the DO pin as data transmission (RX) which in usb serial and in ATMega8535 and received using D1 pin that serves as a data receiver (TX) .Each pin is connected using the USB serial rs232. This method allows an operator to use and change the time when need it. Because the software interface gives the ease of service at rush hour or operarator like solid hours already available, and only enter a number already there dikolom disediakan.Perpindahan in this column automatically, and a solid hour or busy can also be arranged according to the wishes of the operator