Roman Number Calculator

Develop Program for addition and subtraction of Roman Numbers. You should follow Test driven development approach.


OS : Ubuntu

Programming Language: C Compiler: GCC Unit testing Framework: Check (

Roman Number System Rules:

  1. It can only consist of I,V,X,L,C,D,M which converts to 1,5,10,50,100,500,1000 respectively.
  2. There are nothing like decimal or integers in Roman number strings so inputs will be strings.
  3. In Roman number system if lesser numeral is placed before higher value number then its conversion to decimal would be >> Big Number – small number <<
  4. For numeral I, X or C there should not be more then three consecutive I, X, or C i.e if “II” + “II” = “IV” not “IIII” but “II” + ‘I’ = “III”.

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Combinational Circuit Equivalence Checking Using Binary Decision Diagram

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Distributed Beamforming Feasibility Testing

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This project is featured on WARP’s (Wireless open accesses research platforms) Project section. Please visit it Here.

Finite State Machine for Matrix Multiplier

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2.4 GHz CMOS Receiver

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Seven Segment Decoder for Four-Bit Input

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Seven Segment Decoder Output Display
Seven Segment Decoder Output Display

8 bit Multiplier Transistor Level design and its Layout

Carry Save addition methodology is used for 8 bit multiplication. The main Aim was to design a multiplier which would work on low power. Our design worked on as low as 1.2V with power dissipation of 192.2μW and delay was 2.05ns. It was designed on 180nm CMOS technology, and Tested at multiplication rates up to 150MHz.

Micro-Controller Based Servo control Voltage Stabilizer

Developing Microcontroller (PIC16F877A) based volt meter and Ammeter to sense input and output voltage and current. Servo motor is used to control viper of auto transformer, TRIAC and its driver circuit are used to operate servo motor. Protection circuit was made of relay to cut of power in over load and under input voltage conditions. LCD Display to display various parameters and keyboard to externally set/change various set points. Developed complete schematic and PCB artwork of various circuits of project.

Temperature Controller

Temperature controller based on Microcontroller (P89V51RD2), Temperature sensing IC LM35, LCD to display temperature value, Bulb as heating element and Fan as cooling system. This project was done to understand, how to interface LCD, ADC and different IC with microcontroller and its programming.

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