I need a very simple 'NOISE MAKER' circuit design. I say 'very simple' because
a simple electronic humm sound is all I really need to hear. There are
articles on the net describing how to make simple noise. Two examples below:
1.
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Building a Noise Maker with Bare Paint and a 555 timer
Note: For what I need, everything must fit onto a single bread board however!
2.
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Instructions: Build an Electronic Noise Maker
Things You'll Need:
One 555 integrated circuit
One 500 microfarad capacitor
Two 1 ohm resistors
Read more:
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Note that I ultimately need a 3.5mm audio jack to hear the noise through a
headset and it's essential that I be able to hear the noise through a headset
**WITHOUT it making any external sound.** That's why I don't buy a $1 buzzer.
Nothing more than a few cheap components should be required for this design.