oscillator How to control a speaker

Posted on Feb 6, 2014

As far as we are concerned we are looking for a function generator or a VCO (voltage-controlled oscillator). We would love to know which specific component we need. EDIT: What we are actually trying to achieve is to make two sine sound waves. One is constant and the other can be changed by hand with a potentiometer or so. For example if the consta

oscillator How to control a speaker
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nt is 440Hz, the other can be changed between 170Hz to 270Hz or something similar. Another timer will turn on and off an electromagnet, it will be turned on and off with a frequency linear to the changing sound wave`s frequency.

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