Ok I finally got the parts and had time to sit down and work out the EL sound with one switch.
I used a Anakin color change sound board because it does not have flash on clash, it does have sound on clash though. I used a 8 AA battery holder and with a volt meter found a rivet on top of the pack near where the battery connector snaps on that was a ground point that would give 6 volts between that rivet and the main battery positive connector.
I connected the positive wire from the battery pack to the EL inverter and to the sound board. I connected the Negative wire from the battery pack to the EL inverter. I soldered a wire from the rivet on top of the battery pack and connected it to the ground of the sound board. Now I have 6 volts to run the sound board and 12 volts to run the inverter.
I used a 5 volt relay and wired it to the out put from the sound board that went to the leds, and I installed a switching diode to reduce the voltage from the sound board to 5.3 volts to power the relay. The relay when powered up switches on the power inverter by connecting the switched wires from the inverter to the relay. I removed the motion sensor from the led board and connected it to the wires from the sound board that attach to it on the led board.
When you press the momentary switch on the sound board you get a power up flash on the EL blade that looks good and matches the power up sound from the sound board, the same when the board powers down you get a flash on the blade that matches the power down sound. You still have your clash sound but no flash on clash since this board does not have it. You will need a 1.5 inch hilt to fit the sound board into as this is a big board but it works well and allows you to have only one switch to operate both sound and blade.
Xwing could you add this to the thread index
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<center><font color="red"><font size="4"><font face="Comic Sans MS">Darth Technous Sith Lord</font id="Comic Sans MS"></font id="size4"></font id="red"></center>
<center><font color="red"><font size="4"><font face="Comic Sans MS">Give yourself to the Dark Side</font id="Comic Sans MS"></font id="size4"></font id="red"></center>
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