22 February 2013



In the circuit of this project, 555 is used in as table mode with a variable resistor VR1 (1Mohms) connected between pin7 and pin2. R1 is 100KOhms and C2 is 10uF. The capacitor C1 is used to remove ripples if present from DC source. The other pins of 555 are connected as usual in as table mode. The output frequency is taken on the clock pin of counter IC 4017. Enable pin of 4017 is connected to ground.  The reset pin is connected to C3 and R6 which are connected to VCC and ground respectively as shown in the figure. This is done to ensure that IC4017 resets when switch is turn on. Pins 1,5,6,9 are connected to green LED, while pins 10 &11 are connected to yellow LED. The carry out pin 12, is connected to red LED. The duration of the sequence can be adjusted from 7.5 seconds to 2.5 min by varying the 1Mohms preset. The circuit operates at a 9V DC source.

Project describes the functioning of the traffic light system, which are commonly used on the streets. In this circuit 555 timer is used to produce a clock pulses, which are used by a counter to produce the required output.

21 February 2013


Servo Motors are DC Motors check out how DC motor works with a servo mechanism to provide a precise angular motion. (PWM) PULES WIDTH MODULATION technique is used to set the angle of rotation. Generally RC servo motors have a rotation limit of 90 Degree to 180Degree but servos with high rotation angles are also available.



13 February 2013



ADDRESS : House # R-132 ST-15 Sector 5A-1 Behind Khalid Tent North Karachi
N.I.C. # :      42101-17300393
CELL NO : 03333267185
BLOG :       www.universalelectronix.blogspot.com
E-MAIL :    Khurramelectronix@gmail.com

                        To use my skills and potential to assist an organization in achieving  its goals with seeking long term career with optimum Growth. I would be able to apply my skill in Electronics/Electrical Maintenance and Computer fields.


  2013              B.Tech in ELECTRICAL from INDUS UNIVERSITY (appeared)
  2011              DAE in ELECTRONICS TECHNOLOGY from GCT Karachi.
  2009              I.Com from Pakistan Shipowners College , Karachi.
  2007              Matriculation from FAIZ-UL-ISLAM PUBLIC SCHOOL,Karachi.


Read Electronics/Electrical Diagrams.
Knowledge of Basic Electronics .
Computer Hardware/Software .
MS Office,Windows Installation,E.Mailing,Internet Browsing.
Home Electrical Wiring.


                        Worked in INDUS MOTOR COMPANY Pvt Limited (1 Year)
                        Working as a Computer Operator (1 Year)

                        I got 2nd position in class 8th and also received an award in a competition as well as cricket and debate.

                        Further detail will be furnished upon request.

12 February 2013

                           COMMON ABBREVIATIONS

CD=Compact Disk

DVD=Digital Video Disk

AM=Ante Meridian

PM=Post Meridian

AD=Anno Domini

BC=Before Christ

FM=Frequency Modulation

GPRS=General Packet Radio Service

USB=Universal Serial Bus

WWW=World Wide Web

HTTP=Hyper Text Transfer Protocol

HTML=Hyper Text Markup Language

LAN=Local Area Network

SIM=Subscriber Identity Module

GSM=Global System for mobile

WLAN=Wireless local area Network