I just got this crazy idea...
Everyone knows the characteristic sound of a two-tone air raid siren right? For those who don't know what I'm talking about: http://youtube.com/watch?v=S3Z91xfFZ1U
Ok, so here's the idea: building some type of circuit to emulate that sound.
From my research so far I've found out the two tones are at a 5/6 pitch ratio, and go up to about 500Hz on full speed.
So the circuit would have to produce these two tones, maintaining the same ratio all the while the frequency and amplitude goes down and back up according to what I think would be a triangle wave (simulating the spinning up and down of the motor).
I don't know yet, but I think a little distortion would be welcomed for a more "realistic" sound.
If I/we succeed, that should make for a kick*** alarm clock, doorbell, whatever other use you might think of!
Ok go!
Everyone knows the characteristic sound of a two-tone air raid siren right? For those who don't know what I'm talking about: http://youtube.com/watch?v=S3Z91xfFZ1U
Ok, so here's the idea: building some type of circuit to emulate that sound.
From my research so far I've found out the two tones are at a 5/6 pitch ratio, and go up to about 500Hz on full speed.
So the circuit would have to produce these two tones, maintaining the same ratio all the while the frequency and amplitude goes down and back up according to what I think would be a triangle wave (simulating the spinning up and down of the motor).
I don't know yet, but I think a little distortion would be welcomed for a more "realistic" sound.
If I/we succeed, that should make for a kick*** alarm clock, doorbell, whatever other use you might think of!
Ok go!