Graphene Optical Data Storage using Nanoholes
The present invention disclose a method of writing, reading and erasing data in a data storage device. The method comprising of following steps;
- fabricating a data storage device comprising of graphene deposited copper plates
- data writing on the data storage device by drilling nano holes using diode laser in which the laser can be controlled using data encoding schemes thereby causing encoded data stored above the graphene layer as holes or non hole area
- data reading on the data stored above the graphene layer comprises of passing laser light on the data in which reflecting back light varies depending on presence or absence of holes thereby the reflecting light decodes the stored data
Erasing the data stored above the graphene layer is done by self-healing mechanism of graphene. It comprises of applying high heat using laser heater on the data storage device in which the nano-holes on the graphene surface automatically vanishes at high temperature.Invention Title: Graphene optical data storage using nanoholes
Patent Number: 201941026006r
Filed Date: 28.06.2019
Inventors: Dr. N.M. Siva Mangai and Mrs.P.A.Silpa
Smart Charging System
This Smart Charging System discloses an IoT (Internet of Things) based Intelligent charging system for the existing multichemistry batteries as well as the upcoming batteries. The Charging system encompasses: The server device and the client device. The server device stores the different battery profiles and also inputs the specific battery profile to the user. Following that, the client device which is interfaced with the battery, charges it by controlling voltage and current from the AC input. The battery profiles are selected through the switches from the battery profile information menu displayed in the LCD. This whole system comprises of two parts: IOT section and charging section. The IoT section includes PC as server and the client section consists of a microcontroller and an EEPROM. The Server section has GUI to feed the charging algorithm of a particular battery profile.
The server and client devices are connected remotely by Wi-Fi connection. Both server and client are having Wi-Fi modules for the communication. The server Wi-Fi module is in AP (Access point) mode and the client in STA (Station) mode. The client copies the battery profiles data from the server to the EEPROM using microcontroller.
The charging module consist of microcontroller, buck circuit, switching circuit, current, voltage and temperature sensors, LCD, Switches and power supply module. The microcontroller downloads the battery profiles information from the EEPROM and adjusts the voltage and current by buck circuit based on the real time temperature, voltage and current sensor values. The switches selects the battery profiles and LCD shows the basic information like Battery profile list, percentage of Voltage, current etc.