Circuit 2 - Speaker

Well one thing is for sure, I can't stand the sound that this makes, it drives me absolutely insane, but by playing with the capacitors and resistors I have managed to make it beep rather than let off one long obnoxious screech. It is undoubtedly a joyous moment when the speaker first makes a sound (just as it was when my LED lit up for the first time), but when you have a whole classroom full of screeching speakers... it's not exactly the most pleasant thing in the world! It was cool though, and I found it really interesting how you could do different things to control the sound, hook up a switch to change the pitch, and so on. It will also be interesting to see where we can take this next semester. When building this circuit, I had some minor problems controlling the sound in the beginning, it was pretty unpleasant, but with some help from Norm they were not particularly hard to solve.

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Resource: here.