DanBoris' Tech Blog - Hit Sound

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It's been a while since I did an update to my Pong circuit analysis, but I just get distracted by other project far to easily!

 

The next section is the hit sound, the sound made when the ball is hit.

 

 

When the ball hits either paddle the /HIT signal will go low which will clear C2 and set the /Q output high. For /HIT to go low VPOS256 has to be high, so there wonÂ’t be another positive edge on VPOS256 to clock the counter until the next frame. On the next positive edge of VPOS256 after HIT as gone high the sound will be turned off. I havenÂ’t worked out the exact timing on this but it should only stay enabled for one or two frames. The /Q output enables NAND gate C3 and allow the VPOS16 signal to pass through to the sound output.

 

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