scholarly journals Rancang Bangun Pemutus Otomatis Charger Baterai Laptop dengan Algoritma Watchdog Berbasis Single Board Microcontroller

2021 ◽  
Vol 5 (2) ◽  
pp. 166
Author(s):  
Adlan Bagus Pradana ◽  
Bima Wahyu K ◽  
Dian Kusuma J ◽  
Faisal Zeqlyw H ◽  
Thalia Roza Y
Keyword(s):  
Voltage Source ◽  
Current Sensor ◽  
Battery Life ◽  
A Current

Laptop is kind of device which recently used by students, teachers, workers, professionals or executives. As the electronics tools, Laptop is supported by a battery and charger. To save battery life, laptop users usually disconnect the charger from the laptop while the indicator shows the battery is fully charged or when the laptop is turned off. However, due to practicality considerations, it often happens that the AC side of the charger is still connected to the voltage source. However, it was a waste condition. Because even though it's small, when the battery is full the charger still dissipates power. In this study, a device was designed and built which has the ability to disconnect the AC source from the charger when the DC charger side is not connected to the laptop. The watchdog algorithm is used to determine when the current should be cut off. The device is realized by using a Single Board Microcontroller (SBM) and a current sensor ACS712.

A Current Sensor Based on Capillary Microresonator Filled With Terfenol-D Nanoparticles

2021 ◽  
Vol 33 (5) ◽  
pp. 239-242
Author(s):  
Chang-Qiu Yu ◽  
Rui Niu ◽  
Zhong-Di Peng ◽  
Hai Li ◽  
Yong-Ming Luo ◽  
...  
Keyword(s):  
Current Sensor ◽  
A Current

Implementation of Power Line Communication (PLC) for Monitoring Current Use at State Polytechnic of Malang

2018 ◽  
Vol 7 (2) ◽  
pp. 36-39
Author(s):  
Galuh Lukitasari ◽  
Aad Hariyadi ◽  
Ridho Hendra Yoga Perdana
Keyword(s):  
Communication Technology ◽  
Communication Technologies ◽  
Power Line ◽  
Current Sensor ◽  
Power Line Communication ◽  
Data Errors ◽  
Electric Grids ◽  
Current Usage ◽  
Current Value ◽  
A Current

One of the communication technologies that can be used for monitoring current usage is communication technology via electric grids or what is called Power Line Communication (PLC). The advantages of this technology are that the electricity network is already distributed in each building so there is no need for new installations, it is economical and affordable in terms of economics, and is more practical and flexible in its use. In this study, a current usage monitoring system using PLC is proposed which will be applied in every class in the AI ??building of Malang State Polytechnic. The sensor that will be used in measuring the current value is the current sensor SCT-013. By using the KQ330 PLC module as a PLC transmission modem. The implementation of PLC which is applied in each class in the AI ??building has a BER (bit error rate) value of 0.012 in the experiment of sending 1000 data with an error of 12 times at the farthest distance of approximately 15 meters. And have a BER value of 0 or have no error in sending data at the closest distance of approximately 2-5 meters. In this study, the process of sending and receiving data using Power Line Communication allows it to be done at a distance that is not too far away to avoid excessive data errors.

Sensor of Current or Magnetic Field Based on Magnetoresistance Effect in (La0.7Ca0.3)0.8Mn1.2O3 Manganite Film

2009 ◽  
Vol 154 ◽  
pp. 157-161 ◽  
Author(s):  
V.P. Dyakonov ◽  
S. Piechota ◽  
K. Piotrowski ◽  
A. Szewczyk ◽  
H. Szymczak ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Short Circuit ◽  
Operation Time ◽  
Electric Circuit ◽  
Current Sensor ◽  
Detectable Change ◽  
Magnetoresistance Effect ◽  
Manganite Film ◽  
Current Value ◽  
A Current

The main objective of the performed investigations was to enhance sensitivity of a current sensor to weak changes of magnetic field. New design of the sensor of current based on magnetoresistance effect – MRE (MRE = (RH - R0)/R0 , where RH is the resistance in magnetic field and R0 is the resistance without magnetic field) was developed. The sensor was produced in the form of an annular magnet with a gap, in which the (La0.7Sr0.3)0.8Мn1.2О3 manganite film possessing large negative MRE was inserted. Nominal current in a controllable electric circuit can change from a few tenths parts of ampere to a hundred of amperes. The limit detectable change of current value depends on the size of gap in the annular magnet. The operation time of sensor at current overload and short circuit is less than 0.3 sec. These magnetoresistors are thermally stable over the temperature range from (- 50 ° С) to (+ 50 ° С). Proposed sensors based on MRE can be applied in many electrical arrangements and devices.

scholarly journals SIMULASI DAN MONITORING KOORDINASI RECLOSER DAN SSO PADA JARINGAN DISTRIBUSI 20 KV PT. PLN (PERSERO) AREA SEMARANG PENYULANG KALISARI 07 BERBASIS ARDUINO MEGA 2560 DAN VT SCADA 11.2

2019 ◽  
Vol 20 (3) ◽  
pp. 91
Author(s):  
Hanif Zuraida ◽  
Heru Winarno
Keyword(s):  
Network Reliability ◽  
Voltage Divider ◽  
Current Sensor ◽  
Protective Equipment ◽  
Central Controller ◽  
Normal Network ◽  
Driver Circuit ◽  
Coordination Systems ◽  
Sensor Voltage ◽  
A Current

 Hanif Zuraida, Heru Winarno, in this article describes the simulation of protection equipment coordination systems, especially in the recloser and sectionalizer areas. Coordination between protective equipment to improve the network reliability system so that in the event of a disturbance, the area affected by the disturbance does not spread widely. The simulation tool is made using OMRON LY2N 12V relay, ULN2803 relay driver circuit, ZMCT103C current sensor, voltage divider voltage sensor, pull down, 12V 6W lamp as a load and several resistors with different resistivity values as interference. Arduino Mega 2560 is used as the central controller for the entire circuit. After the experiment, the results obtained are when the normal network current at the recloser is 0.86 A and the current at the LBS SSO1 is 0.43. The recloser and LBS SSO1 coordination lies in zone 2 and 3 disturbances. When simulated zone 2 interference, the recloser current rises to 1.28 A, causing reclose / trip to lock out recloser. When the recloser feels a fault current in zone 3 of 1.06 A and LBS SSO1 senses a current of 0.64 A. The recloser as protective equipment will open first within 1000 ms after sensing the disturbance. When the recloser opens, the voltage on the SSO will be 0 volts and the SSO will open within 1000 ms after the current and disturbance requirements are met. Then the recloser will close again after 2000 ms from the open condition.

300 A current sensor using amorphous wire core

1990 ◽  
Author(s):  
Y. Kashiwagi ◽  
T. Kondo ◽  
K. Mitsui ◽  
K. Mohri
Keyword(s):  
Current Sensor ◽  
Amorphous Wire ◽  
Wire Core ◽  
A Current
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