2B-DELUXE DISPLAY BOARD
In the electronics age when there is developments in all fields, there is lot of increase in the number of display board projects. This project is used where display board of many words is required. This project is very useful for the shop because it attracts the customers.
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 is a revolutionary project in the world of display boards. This is a new addition in our display board series projects. IC 4017 and IC NE556 have been used in this display board. Both are digital IC. IC 556 is a Dual Astable Multi vibrator and IC 4015 is a eight digits decade counter. Pin no. 7 of IC NE556 is given negative supply and positive supply is given to the pin no. 14. The out put of the IC is available on Pin no. 5 and 9. Pin no. 6 and 8 are triggering pins. There are two flip-flop circuits in the IC and this IC works as a timer. Another IC 4015 is a counter. There are 10 outputs which are available on pin no. 1, 2, 3, 4, 5, 6, 7, 9, 10 and 11. One LED is connected at the each output through one resistance and diode. 12V DC supply is used in this project. The main attraction of this project is that connecting IC CD4015 with the one IC556 number of output can be increased. Increase of one IC CD4015 gives more 8 outputs. Thus, through this circuit a display board of bigger design and more words can be made.
PRECAUTIONS WHILE ASSEMBLING THE PROJECT:-
* While soldering keep the PCB clean so that there is no short in print on the PCB.
* Use the IC base.
* Do not solder IC directly on PCB because due to leakage of current from the soldering iron it spoils the components.
PCB [CODE 6TP13]=1
1K=8, 10E=1, 2M=2, 470K=1
10mfd/25V=2, 0.1 pf =1