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Voltage Controlled Oscillator

It works!  And this circuit even makes noise.  I will try to attach a video of it soon. 
Questions for the Voltage Controlled Oscillator
1. Adjust the potentiometer.  What happens to the sound frequency as R3 is adjusted?
The lower the resistance, the lower the frequency.
2. Measure the voltage being applied to pin 5.
.75 V
The last thing I am going to make for my physics project is an electronic organ.  I really hope that it works and I am excited to see what happens.  I will start tomorrow.

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