video
Olaf Hochherz(electronics with book), Ryu Hankil (analog clockworks, piezo)
Olaf Hochherz(electronics with book), Jin Sangtae(HDD, PDA)
picture
올라프 호르허르츠 Olaf Hochherz : electronics (book with piezo)
류한길 Ryu Hankil : alalog clockwork with speaker feedback
진상태 Jin Sangtae : Hard disk drives with PDA