ABSTRAK Pemanfaatan smarthome berbasis internet banyak digunakan sebagai sarana untuk memudahkan pengontrolan. Penelitian ini memanfaatan teknologi internet dan sebuah mikrokontroler sebagai kendali otomatis. Penelitian ini bertujuan untuk membangun perangkat lunak dan perangkat keras smarthome Wemos D1 R2 Arduino compatible berbasis ESP8266 ESP-12F. Dengan metode eksperimen dan studi pustaka, penelitian ini telah berhasil merancang bangun smarthome menggunakan Wemos D1 R2 Arduino compatible berbasis ESP8266 ESP-12F. Komponen yang digunakan pada penelitian ini meliputi: mikrokontroler Wemos D1 R2, ESP8266 ESP-12F sebagai wifi, 3 relay untuk 3 elektronik (lampu, kipas dan pengeras suara), 3 led untuk indikator 3 elektronik, resistor dan sebuah smartphone yang digunakan sebagai pengontrol elektronik melalui website. Hasil penelitian ini sudah sesuai dengan tujuannya yaitu membangun perangkat lunak dengan alamat IP yang digunakan 192.168.43.52 (setiap Wemos memiliki IP address yang berbeda-beda) dan perangkat keras dengan mensimulasikan smarthome menggunakan LED maupun alat-alat elektronika. ABSTRACT Utilization of Internet-based smarthome is widely used as a means to facilitate control. This research utilizes internet technology and a microcontroller as an automatic control. This research aims to build software and hardware smarthome Wemos D1 R2 Arduino compatible based ESP8266 ESP-12F. Using experimental and literature study methods, this research has successfully designed a smarthome build using Wemos D1 R2 Arduino compatible based on ESP8266 ESP-12F. The components used in this study includes: Wemos D1 R2 microcontroller, ESP8266 ESP-12F as wifi, 3 relays for 3 electronics (lamp, fan and loudspeaker), 3 leds for indicator 3 electronics, resistor and a smartphone used as electronic controller through the website. The results of this study are in accordance with the goal of building the software with IP addresses used 192.168.43.52 (each Wemos has a different IP address) and hardware by simulating smarthome using LED and electronic devices.
This hybrid motorcycle design is to combine 5.65kW gasoline engine and 48V DC 0.5kW electrical brushless motor in serial-parallel type. Master control unit use a microcontroller ATMega16 to control gasoline engine and electrical motor alternately. Speed sensor is placed on the rear wheel to detect the motorcycle’s speed. When the motorcycle’s speed reaches the top threshold at 30km/h, it driven with gasoline engine and when the motorcycle’s speed getting lower to the bottom threshold at 5km/h, it changes with electrical motor. Battery charged with plug-in system to power supply.
Fuel entering through the main jet nozzle, affects engine performance and the composition of the exhaust gas is produced. Research the composition of the exhaust gases in machines otto one cylinder done with experimental method. The purpose of this study was to obtain the characteristics of the engine with exhaust gas analysis method. This research done with varying size main jet nozzle and varying the engine rotation every 400 rpm. Data processing the results of testing includes a comparison of the composition of the exhaust gases is HC, CO2, CO, O2, AFR, and the temperature of the exhaust gases. Then calculate the enthalpy of combustion for each main jet nozzle. The composition of the exhaust gases are best obtained from the main jet nozzle GX 160 which has the highest CO2 value of 20%, with the lowest CO value of 1.26% and the largest combustion enthalpy value with the value of 264.769 kJ. From the analysis can be known that the burning of the main jet nozzle GX 160 approaching the stoichiometric combustion.
The human needs of refrigeration system have created a tool that called a refrigerator. Refrigerator/cooling machine have a component which have a very important role in the refrigeration system that is refrigerant. Refrigerant that still widely used for cooling machine until now is the refrigerant R22. Using R22 refrigerant can cause environmental problems such as damage to the ozone layer and global warming. Therefore, it needs a substitution refrigerant which is more friendly for environment which one of them is R407C refrigerant. In this study, using a cooling machine with water- cooled condenser and the flowrate that use is 20 L/h, 40 L/h, 80 L/h and 120 L/h. The variables that measured in this study is temperature (T1, T2, T3, T4, T10, T11), pressure (P1, P2, P3, P4), and ampere. This study aims to get the test results using refrigerants R22 and R407C. The processing data of the test result include refrigeration capacity, compressor power and COP. The results obtained have that cooling machine which use R22 refrigerants have a better COP than using R407C refrigerant. This is happen because the power needed by the compressor to compress R407C refrigerant to flow in the system is greater than using R22 refrigerant.
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