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Custom Doctor who Sonic Screwdriver component Help!

Hello everyone!
My electronics knowledge is just basic. but i am a very cleaver and adaptive learner.

My question is this. I need to have a Button that slides upwards to extend the connected piece upwards about 2 inches. here's my complication. I need it to cause an electronic sound ,but as it slides up the pitch changes. I cannot think if the proper components to cause this to work. Any help would be wonderful! Thank you.
 
Hi,

The solution closer to your need is probably a sliding potentiometer connected to an oscillator circuit.

Olivier
 
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