Suvojyoti Koleh

• Document Study: Study customer specification documents, and prepare a block diagram. Review the design for accuracy and completeness prior to implementation.
• Circuit Design: Schematic design using Altium software, footprint creation, and PCB layer stack-up.
• Component Selection: Component selection as per guidelines (EOL, accuracy, availability).
• Simulation/Analysis: LTspice simulation for circuit output and accuracy, power budgeting, and power dissipation calculation.
• Hardware Troubleshooting: DC converter testing as per requirements guideline (Efficiency, Line regulation, Load regulation, Ripple, Temperature Rise).

• This project involves evaluating different types of boards, such as Motor Control, IoT, and Power, and demonstrating their functionality on a Cloud Platform.
• The hardware integration aspect involves bringing up the board and understanding its functionality.
• This includes integrating the board with other components, like a baseboard, Raspberry Pi, and additional circuitry, such as optocouplers, operational amplifiers, motor controllers, ADC, DAC, isolated voltage, and current sensors.
• The tech stack for this includes Embedded C and C++ for programming the microcontrollers, and other hardware components.
• For the lab setup, the project requires preparing a lab environment using instruments like an oscilloscope, electronic load, electronic power supply, and a single-board computer.
• These instruments are automated using Python, Pandas, and NumPy to facilitate testing and data collection.
• Debug and test components in various SMPS topologies, including buck converters, flyback converters, buck-boost converters, and hybrid flyback converters.
• Use tools like oscilloscopes and multimeters to measure voltages and currents, identify issues, and ensure proper functionality.

• Product redesigning: Designing circuit schematic and connection diagram for acoustic leak detection involving frontend analog circuit, multiplexer, optocoupler, and 4-20 mA current output circuits.
• Firmware development: GSM-based water level indicator using Arduino and AVR microcontroller.

• Led design and development of Formation charger, collaborating with multidisciplinary teams throughout project lifecycle.
• Designed analog and digital circuits utilizing microcontrollers, op-amps, ADCs, DACs, and shift registers.
• Selected and validated hardware components including thyristors, MOSFETs, BJTs, and diodes through rigorous testing.
• Created schematics for microcontroller board (PIC18F6622), thyristor firing PCB, and related circuitry.
• Conducted embedded hardware testing and developed programming skills for PIC microcontrollers including ADC and DAC functionalities.
• Analyzed technical feasibility of systems, performing initial designs and prototype integration.

• Tested, commissioned, and troubleshot microcontroller-based industrial battery chargers and related equipment.
• Executed commissioning of battery charger/discharger with computerized process control using PLC and SCADA.
• Coordinated project activities with third-party vendors and development teams for successful completion.
• Engaged with customers including TISCO, EXIDE, AMARRAJA, D.V.C., N.T.P.C., and TATA Motors.
• Conducted testing and monitoring of battery formation rectifiers and life cycle testers.
• Implemented testing protocols for float cum boost chargers and high current rectifiers.
• Oversaw production line testing using PLC-based systems to ensure operational efficiency.
• Managed electro dip painting rectifiers to optimize performance across various applications.

Operation and Maintenance: Operation and maintenance of the water treatment plant involving SCADA monitoring and calibration of sensors.