If you post a clear picture like mine than more people would be able to help.
I was thinking of using timing of the Q0 and Q1 to come up with the correct logic but I havent tried it out yet.
Or better still, you can add 1 more "4 bit shift register" on each side of the existing 74194 and join them as 16 bit universal shift register but left out the first and last LED.
Allen
To get the correct conditions to step the score counter is not easy. In my schematic, I used the Q0 output on the left 74194 and the player A button to step the wining counter of player B but not successful.The 7 segment must count the score when the player loses and misses the ball not every players turn.
I was thinking of using timing of the Q0 and Q1 to come up with the correct logic but I havent tried it out yet.
I think this is the inherent problem as the designer wanted to cut down number of chips. If you are able to get a "one bit universal shift register" then you can put it on both sides of the 74194 to store the logic "1" when the start button is pressed. So the whole circuit would be like a 10 bit shift register with only 8 LEDs connected.1st when the game starts the ball is already in the first L.E.D it must be not seen until the service is done
Or better still, you can add 1 more "4 bit shift register" on each side of the existing 74194 and join them as 16 bit universal shift register but left out the first and last LED.
Allen
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