Published on 07.02.2016 in [objects]
Sirens are inexpensive (~$3.75) sound installations. They are public,
site-specific, solar powered and easy to assemble.
Solar panel - $0.55
40106/74C14 IC - $0.50
1uf capacitor - $0.20
Photocell - $1.15
Speaker - $1.10
Magnet - $0.75
(not including spare wires, solder, soldering iron, and hot glue)
Inspired by Evan Roth's LED throwies, Laura Plana Gracia's solar sound boths
workshops, and Max Neuhaus.