Gsm based substation monitoring and control system

Substation is a place where electrical power is monitored and controlled. Most of the substations are located in remote place. Because the equipments in the substations are dangerus. But this subatations has to be monitored periodicely to make sure that power quality is much reliable.

Working of this project:
This project provide a solution to monitor the parameters of the substations and a easy way to control the switch gears in it. This switch gear control is provided with the required interlock, witch is importent while opening or closing the switchgears. All this process is done using our hand held mobile phones via SMS service.

Safety and security:
Talking about safety, this project provide safety to the equipments by the required interlocks provided to it.
Security is provided to the system using 6 digit password that is manditorely provided along with the SMS. This password uses 128 bit encription technology(as provided in netbanking accounts) witch increase the security of the system.

Technical details:
Atmega 8 microcontroller is used as brain of the system to control switchgears and monitoring meters.
Merckley key encription technology is used for 128 bit encription.
Electromagnetic relay is used as switchgears (for prototype model).
CT ratio of 5:1 amps is used (for prototype model).
PT ratio of 300:5 volts is used (for prototype model).

Vehicle Accident identification system with auto SMS

Vehicle Accident identification system.

It is difficult to predict an occurrence of road accidents. if occurred, it is manditory to save the person depending on engury. this project will send a SMS to nearest 108 ambulance if an accident occur. this SMS will be sent within a time of 10 seconds of the accident time. but if the accident is not severe, the person in the vehicle can stop sending SMS by pressing a switch in it to make sure that unwanted intimation can be avoided.

Technical details:
This project is made using atmega128 Microcontroller(brain of the system),
SIM300 GSM modem is used to send SMS.
GMS module with patch antenna(small size) is usd to fetch the location where accident occurred.
Entire unit works using 12V DC power supply. witch can be easy to fix in vehicles.

Non contact type drip bottle level monitor for patient care.

patient care electronic system.
This project is used to take care of patients admitted in hospitals. If a patient is feed with drip glucose, it is very manditory to monitor the level of the drip in bottle. If the preassure of drip reduces bellow patient blood preassure, then blood gets reverse path. This makes the patient condition risky. To avoid this this project is helpful.
This project sence the liquid level and transfer this reading to the nurse table. It also alert the nurse by giving alarm along with intimation of bed number to the device preasent in her table.

Technical details:
Liquid level is senced safely using microwave capacitive technology (similer to induction stove).
Full assembly is powered using 4.5v(equel to 3AA size batery voltage) makes the system much safer.
Atmega8 microcontroller is used as core CPU to control the entire process (mail me to rajee.moorthy@gmail.com if you want the program and schematic diagram)

Voice controlled devices

VOICE CONTROLLED HOME APPLICANCE
very useful for physically disabled peoples.




using this project, a person can control the appliance in his home using voice.
i utilized the Windows7 voice detection tool to do this.
project is designed in visual basic-6, neural network is implemented to analyse and make decisions for unknown voices that is not available in data base. the user can train the system to his voice.

Simple notice board

Today me and my friend mannar tried for a simple notice board program. Idea of this is to learn lcd and uart interfacing with microcontroller. We had successfully done it.

Preparing embedded pcb

In my office me along with my friend prepared a 8051 controller board soldering some components. Its really interesting to work as a teem.. i like it so much.

Soldering is a great skill. Electronic engineers would know. its really fantastic to learn this. my friend is soldering a 8051 microcontroller IC-BASE in the PCB

Soldered IC base in legend view.

Full assembled PCB of required components and ready to get programmed.