2B-SUPER DELUXE DISPLAY BOARD
It is unique project in the display board world. In this with the help of greater than one IC attractive display has been arranged. In case one bright glow LED is used the viewer can automatically be attracted.
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 circuit is a revolutionary project in the world of display board. In this display board only one IC 4017 has been used. This is a digital counter IC. It has got 10 outputs. In this two transistors BC547 have been used as an oscillator. The output of this oscillator has been given to trigger pin no. 14 of IC 4017. IC 4017 has got 10 outputs. Outputs are available on pin no. 1,2,3,4,5,6,7,9,10,11. We have used 14 no. of diode IN4148. The diode has been fixed in such a way that its output is received in serial order due to which display looks in a magnificent way. IF you have to fix a number of LED’s then you can use a relay with output transister as load.
PRECAUTIONS WHILE ASSEMBLING THE PROJECT :-
- Do not solder the IC on PCB directly.
There is every possibility of parts being damaged due to leakage current from the soldering iron.
- Before fixing the transister check the collector, base and emmiter by multimeter.
LIST OF COMPONENT
PCB [Code 5TP04]= 1
470K=1, 27K=1, 4K7=6
IC4017=1, BC547=6, IN4007=4, IN4148=16, LED=4, ICBASE [14 Pin]=1
Cabinet =1, DC 9V Supply =1