Fret

Features

• 6x capacitive touch areas (top area)
• 6x RGB leds (mounted at the top as well, also acts as tactile feedback)
• Uses
  • fret area(about 20 of them)
  • Headstock(perhaps for choosing the tuning),
  • Electronics area on the bottom(settings again)
  • Strumming area, though perhaps this needs a separate board with bigger sensor areas.

Interconnects

Each fret board will be self contained and will communicate via a bus to the main board.

Pinout:

• 5V -> LED
• Noisy LED GND
• 3.3V -> MCU+logic
• GND
• SDA - I2C
• SCL - I2C

Methods:

Perhaps a long rail(capable of carrying about 4A for the lights) underneath the boards, and contacts dropping from each of them to it. $1/fret. Might not make contact

Long(all the way in the neck) 22AWG(7A) wires with single idc connectors: 6x SMD Connectors. $1.6/fret

SMD header pins + Ribbon Cable(multiple wires for more current) + IDC Connectors. More than $2/fret. Probably big.

Enumeration

Since all frets are on a bus, and nothing intrinsic about the wiring tells the mcus what position they're at, there's going to be a need for a routine where frets are activated in order and they'll save their position.

##Hardware ###Wood

• Buy a piece of hardwood
• Cut slot with a table saw/router(space for wires/components)
• Make holes for screws, mount pcbs
• Round the bottom