2B-REVERSE FORWARD RUNNING LIGHT CHASER
You can use this project to decorate your home. It enchances the beauty of your home as well as Temples. The special feature of this gadget is that it can function in reverse mode also. As such it can be attached to the display board of your shop to enhance its attraction.
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.
Now-a-days CHASERS of various types are available in the market. Most of them use either electric motor or Iron plates or rounded Wooden Drum. This consumes more electricity and also the bulbs glow from one side. This project employs bulbs or L.E.Ds, arranged in such way to produce attractive lights through forward and reverse bias. The project is based on timer IC 555 and counter IC 4017. The IC 555 controls the OFF/ON speed of L.E.D glow. The output Pins of counter IC 4017 is utilized in such a way to make reverse counting of the information. As a result the L.E.D.s or bulbs glow from one side first and than other. In other words the glowing of L.E.D. returns back. The cycle thus continues.
PRECAUTIONS WHILE ASSEMBLING THE PROJECT:-
*Use IC base for mounting of the ICs otherwise IC may damage due to current leakage of solderinf iron.
*While mounting transistor, you should connect collector , base & emitter properly.
*Check polarity of electrolytic capacitor while mounting on PCB otherwise reverse connection may damage it.
*Check the polarity [ Anode & Cathode] of Diodes before fitting.
*First of all check all the components as per circuit.
IC 4017 = 1
IC 555 = 1
10K = 1
220K = 1
BC148 = 3
100MFD/25V = 1
IN4007 = 6
RELAY 9V = 3