Vibrations (last updated on October 6)

Creating patterns using sound waves was what lead me to this project. I used the following schema in order to create the circuit.

Electrical circuit of a speaker

 

Transistor

At first, Aaron helped me to build this circuit, afterwards, I recreated the circuit myself.

 

You are invited to see how I made the enclosure.

 

UPDATE (Oct 6):

Adding a potentiometer I was struggling to understand how to wire it, but then I figure that there is no a real difference between power and ground.

 

My speaker was not making a sound, therefore, I check my new circuit with a small speaker that works.

 

After examining my old speaker, I realized I need to fix it. I looked online to saw what parts the speaker is made of and what can be wrong in the speaker. I mainly fixed the Spider and put a new Cone.

 

 

I mix cornstarch and water in order to make a solution.

 

I put the bowl on the speaker you can hear that now the speaker is making sounds, by using the potentiometer the tone goes up and down. However the volume is too low and no ripples were seen.

 

I tried to increase the volume using a higher voltage and current but it did not work.

The potentiometer was used in order to control the frequency (Hz) of the tone. What was odd is that even though I changed the making rang the highest tone remained the same.

I even tried to imitate turning the speaker on and off as I did manually lest week in class as I saw some random ripples by adding the “delay” function. However, as a result, instead of evoking the tones gradually it separated between each tone.

Questions:
How to increase the volume?
Why does the tone not reach above a specific Hz?

Categories: Physical Computing

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