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Step 1Materials
The whole project shouldn't cost much more than the price of a tin of Altoids. I just improvised in terms of materials and you may find that you have some stuff lying around the house that would work better than what I used.
You'll need:
1 x Altoids Tin
~1/2 foot of 1/8th inch Steel Bar
1x 1.75" Length of 3/8" Brass Tube
1 x old/broken Rake you are willing to mutilate
2 x 1 inch Machine Screws with nuts and washers (Look around and see what you have)
1 x Inquisitive Mind
OPTIONAL (to make electric):
1 Small Piezoelectric Buzzer from RadioShack
1 1/4" Audio Input Socket
You'll need:
1 x Altoids Tin
~1/2 foot of 1/8th inch Steel Bar
1x 1.75" Length of 3/8" Brass Tube
1 x old/broken Rake you are willing to mutilate
2 x 1 inch Machine Screws with nuts and washers (Look around and see what you have)
1 x Inquisitive Mind
OPTIONAL (to make electric):
1 Small Piezoelectric Buzzer from RadioShack
1 1/4" Audio Input Socket
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Also, could I use a piezo element?