The design of a watt peak meter of solar panel has been carried out using an LDR sensor to obtain the strongest light as the sun moves. The electronic circuit used includes LDR KY018, WEMOS ESP32, servo motor, Solar Charger Controller, INA219 Power Sensor, Battery and 10 A / 5V Relay. The mechanical structure uses angle iron construction which is assembled in such a way as to support solar panels with the SUNLITE Model 156P-20 type. Solar panels are positioned on 2 poles and attach the bolts as the rotary axis. LDR that gets sunlight will provide input to the WEMOS ESP32 to drive the servo motor in line with the direction of the sun in the east - west direction. The result led to an average 93,7% close to number as stated in the data specification of solar panel.

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under  100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms. The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.Keywords : Radiance Energy, Joule Thief, and  LED Module.

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Salah satu faktor yang menyebabkan tingginya temperatur pada instalasi kabel listrik adalah posisi kabel yang ditekuk. Pemasangan instalasi listrik di rumah maupun pabrik tidak selalu lurus, dalam keadaan tertentu dan pada lokasi tertentu pemasangan kabel mengharuskan penekukan. Penekukan kabel yang tidak memperhitungkan sudut penekukan menghasilkan kenaikan temperature yang tinggi sehingga memungkinkan terjadinya isolasi terbakar dan kawat penghantar meleleh. Penelitian ini bertujuan untuk menurunkan temperature instalasi Kabel NYM 2 x 1,5mm2 dengan mengatur sudut penekukan. Instalasi kabel NYM 2 x 1.5mm2 dialiri arus dengan variasi 5A, 10A, 17A, 18A dan 19A dengan sudut tekukan kabel adalah pada 30o, 60o, 90o, 120o , dan kabel ditekuk balik. Pengujian menggunakan alat test Omicron CPC 100 yang mampu mengeluarkan tegangan output hingga 2kV AC dengan arus listrik sebesar 800A AC dan 400A DC. Hasil penelitian menunjukkan bahwa instalasi kabel dengan sudut penekukan yang tumpul mengurangi temperatur secara signifikan sehingga isolasi tidak terbakar dan kawat penghantar tidak meleleh. Instalasi kabel dengan sudut penekukan lancip (300) menyebabkan temperature naik secara signifikan sehingga isolasi lebih mudah terbakar.

This research aims to create systematic monitoring of a single-phase electricity meter that is accompanied by power monitoring features, the amount of electrical energy usage costs and relay control features using internet connections. The design has been carried out using  PZEM-004T current and voltage sensors. The microcontrollers have been implemented by using ESP8266. This configuration is to reduce separate micro-controller. The embedded microcontroller and WiFi are made improvements from previous research. This embedded microcontroller is used to send data to the internet through WIFI. This monitoring system can then be accessed using the Cayenne interface. The test results of this tool show that the connection between the microcontroller and the Cayenne application works well through an internet connection. With this tool, users can see real-time data on the use of electrical energy and its cost, as shown in the cayenne dashboard. The voltage sensor test results show an average accuracy is 99.17%. The current sensor testing has an average accuracy rate of 96.9%. On average, the wattage delta between the cayenne dashboard and multimeter measurement is 2.16 watts.