I'm gonna use the toy Soundboard to do the phaser fire sounds and light the light buld (will replace with amber 5mm LED soon) while the arudino contains the beep for the power level up.
How will you do that? Does it have some input connections, so you can select which sounds to play?If that works, the Arduino will not need to make the sound effects (except beeping), so you can use multiplexing to light your 16 LEDs using 8 pins, or as few as 5 pins (charlieplexing).
Stop stalling. Tell us what you know about the sound board. Post pics.
Ok, well... It's quite a mess. Geordie would not have approved.The main problem I can see is that the buttons that control which sound effect is made won't work as "power up/down" buttons. If you press "power up" more than once, the circuit cannot tell that this has happened. When you press "power up" the first time, the spdt switch moves to the corresponding position. If you press "power up" a second time, nothing happens because the spdt switch has already moved. Do you understand what I am saying? Do you have a plan to fix this?