CHASER

3TP07

2B-CHASER

PROJECT SPECIALITIES

This project is different from the common chasers.  L.E.D. of different colours in groups of three each are employed in the project to work as chaser.  This project can be utilized to decorate your home, temples etc. to enhence its attracion.

TECHNICAL DESCRIPTION AND WORKING

This project has been developed and tested O.K. in our TV Engineers Technical Lab.  The components and PCB used in the projects published in our books are available for sale at resonable price.

This project mainly employs two timer IC 555.  These two ICs work in one timer duration.  In this project, the red group of L.E.Ds are chased first, then the green and orange.  The transistor BC 148 plays an important role for chasing orange group of L.E.Ds.  The moment when the time duration  or the output of both the ICs are equal, the transistor BC148 conducts and the orange group of L.E.Ds are chased.  This project consumes very low power and appears attractive as its employs L.E.D. of different colour.

PRECAUTIONS WHILE ASSEMBLING THE PROJECT:-

 

  1. Check all the component as per the circuit.

2.use IC base for mounting IC. The IC may be damaged it excess

 

h

eat is applied or the soldering iron is leaky.

  1. Check the collector , emmitter and base of the transist
    or before soldering.

LIST OF COMPONENTS:

 

IC555 2

TRANSISTOR

BC148 1

CAPACITOR

10MFD/16V 2

RESISTANCE

180E 1

270K 3

10K 1

PRESET

470K 1

LEDs RED 4[GROUP]

LEDs GREEN 4 [GROUP]

LEDs ORANGE 4 [GROUP]