From the page: Idle wood wants to become a piece
Idea 7
Tin can ukulele or small guitar with wooden neck
Instruments made of tin and wood have tradition in many cultures — from American cigar-box guitars of the early 20th century to improvised violas and cavaquinhos in samba and choro circles. The physics is direct: the string vibrates at a frequency that depends on length, tension, and thickness; the can works as a soundbox, amplifying the vibration through the air that shakes inside it.
What you need
- Tall, sturdy can (powdered milk, paint — washed and with no residue)
- Hardwood board for the neck (about 50 to 70 cm)
- Used guitar strings or strong nylon
- Simple tuning pegs or screws and nuts for tension
- Wooden piece for the bridge
- Drill, or a strong nail and hammer
How to make it
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1
Fix the wooden neck to the side of the can, crossing it partially — the neck must be firm, because all the string tension rests on it.
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2
Make a hole in the bottom and in the lid of the can for the string to pass through and for the sound to come out — the bigger the hole, the deeper and more open the sound.
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3
Install the tuning pegs on one end of the neck and the string anchoring system on the other — the tension defines the tuning, so they must hold firmly.
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4
Position the wooden bridge between the string and the can's lid, to transfer the string's vibration straight to the metal.
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5
Tune by ear or with an app, tightening the pegs little by little — short, tight strings give high notes; long, loose ones, low notes.
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6
Mark the position of the notes along the neck to help playing.
Finishing touches
test different cans — wider ones sound deeper; a thin wooden top over the can's opening transforms the timbre, making it softer.
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