Build one!

Notes:

The Stepchild is designed to be relatively simple to assemble and build yourself, but there are a few things to to keep in mind before jumping into the project. The first thing is that even though all the Stepchild components can be easily sourced from scratch, the Stepchild's four PCBs need to fabricated with a manufacturing service. This is why there's a kit! You can of course have them fabricated and assembled yourself, but they're likely cheaper when bought in the kit, which also comes with the full parts list.

A note on ordering the PCBs yourself: Three of the PCBs (the main board, screen board, and step button board) require tight SMD component soldering. Although you can assemble them by hand, I really recommend having these boards populated using a PCBA service! If you're already using a service to fabricate your own PCBs, I recommend paying to have these three boards fully populated with their SMD components.

There is a lot of soldering required to build the Stepchild. Most of the assembly process isn't very difficult, but if you're totally new to soldering, this might not be the best experience. Check out the build video and see if this is a project you'd feel comfortable with.

Things you'll need:

  • A soldering iron + solder + be safe! Don't solder without good ventilation, and use good safety procedures if you're working with leaded solder.
  • Small clippers for trimming pins
  • Foam tape or superglue for mounting the screen & screen protector
  • A google doc with the parts listing can be found here (note that the listings might not be updated).

    If you're printing your own case, the enclosure can be printed on any FDM 3D printer with an 0.2mm nozzle, or an SLA printer, with a build size of at least 180x180mm.

    And that's it!

  • Part

    Quant.

    Top Shell

    x1

    Bottom Shell

    x1

    Battery Cover

    x1

    Raspberry Pi Pico

    x1

    2.42 24pin OLED

    x1

    Rotary Encoder Knob

    x2

    Push Switch Rotary Encoder

    x2

    Button Cap

    x8

    6mm Push Button

    x9

    Joystick

    x1

    3.5mm SMD Jack

    x5

    5pDIN MIDI Jack

    x5

    TRS Jack

    x4

    link

    3xAA THT Battery Holder

    x1

    Slide Switch

    x1

    LED Button Cap

    x16

    LED Button

    x16

    4P JST-XH Connector

    x2

    5P JST-XH Connector

    x2

    8P JST-XH Connector

    x2

    1x7 2.54mm Header Pins

    x1

    1x3 2.54mm Header Pins

    x1

    8P JST Ribbon Cable

    x1

    5P JST Ribbon Cable

    x1

    4P JST Ribbon Cable

    x1

    M2 Screw

    x16

    22mm Brass M2 Standoff

    x4

    4mm Brass M2 Standoff

    x4

    8mm Brass M2 Threaded Standoff

    x4

    Main Board PCB

    x1

    Screen Board PCB

    x1

    Step Button PCB

    x1

    CV PCB

    x1