I am looking to make a pencil whose tip moves to create a waveform as you move it across the paper.In essence, I want to be able to record a sound and then play the sound through the pencil whilst I draw with it, of course, I will use software to lower the frequency to make it more of a waveform and not just a vibration.
I have many ideas but I am thinking of using a solenoid to actuate a pencil which I can move across some paper. Sadly, I do not have access to one to experiment with so I was hoping someone could hook a small solenoid up to an amp and tell me the results before I buy one?
If not this, what is the best way (using an amp) that I could achieve the desired effect? I have considered using a subwoofer but this will be bulky.
I want to keep it simple which is why I am not considering the use of a servo.