Parts List

1. One plank 93 mm wide and 20 mm thick from which is sawn,
   Bottom plate, 600 mm long (A),
   2 transverse supports 93 × 60 mm (B1, B2),
   2 longitudinal supports 100 × 60 mm (C1, C2),
   Magnet support 93 × 100 mm high (D).
   and with a cutout 14 mm wide and 55 mm deep
2. In the magnet support, two magnets stick to two bolts M6×40 mm.
3. Violin steel G string (196 Hz).
4. A tuning screw (tuning peg) for guitar.
5. 2 nuts for guitar (the part, at the top of the fingerboard, over which the string runs through a groove).

Optional optical sensors (typically less than $10 each):

• OPB815 W with 9.5 mm gap (Optek)
• ELITR8102 with 3 mm gap (Everlight)
• ELITR8402 with 6 mm gap (Everlight)

Suppliers:

• In Sweden: Elfa. Suitable magnets are part number 37-522-68.
• In the U.S.