2 layers66.9 × 74.5 mm
2 layers65 × 30 mm
IOBoard
RunTheBot/erLay1A ultra portable CoreXY 3D printer
- Size
- 65 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 53
- Pads
- 173
- Tracks, vias
- 371, 36
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Feb 2025
- Updated
- 11 Jul 2026
Overview
IOBoard is an open-source printed circuit board by RunTheBot, from the RunTheBot/erLay repository on GitHub. It is a 2-layer board of 65 × 30 mm with 20 parts on 53 nets, routed with 371 tracks and 36 vias.
Its parts include 7 capacitors, 6 connectors, 4 resistors, 1 IC and 1 diode. It belongs with the robots and motor control boards of this library.
README
README.mderLay is a ultra-portable CoreXY 3D printer made by Evan Yu and Aaron Huang
This printer is built to print small parts needed fast at robotics competitions where our main limitations are space and time. This printer will mainly print spacers, shaft collars, pullies, etc.
BOM | CAD | Journal | Video
Goals (we didn't manage to hit all of these within budget)
- Ultra-portable (for robotics competitions!!)
- Pico MMU (Optional) (Not in budget 😭)
- Zero Click ABL (Optional)
- Built-in carrying case (The printer will collapse into something like a pelican case) (Gave up on this one. see journal)
- Can be powered by a (multiple) power banks (Gave up on this one)
- NO STANDARD EXTRUSION (I think they look ewww and too normal)
Features (Items in the final build)
- Locally sourced frame (Proudly Canadian)
- Easy to disassemble (8 Bolts)
- Core XY
- Klipper
- NeoPixel LEDs
Interesting note on design!
As you will notice, most of the frame is built out of linear rods. I was inspired by hex shafts in FRC and how we tap them and use a bolt to clamp both sides. I decided to do this for infill to maximize rigidity and minimize construction/deconstruction time.
Sponsors
Massive thanks to PolyMaker for sponsoring erLay!
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C7 |
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4 |
| 2 | 2171790001 | Components:MOLEX_2171790001 | J3, J4 |
| 2 | Conn_02x20_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J1, J8 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | D | Diode_SMD:D_SOD-323 | D1 |
| 1 | USB_A | Components:USB-A-TH_USB-231-ARY | J2 |
| 1 | ~ | Components:SL2.1A | U1 |
| 1 | ~ | Components:USB-A-TH_AF-SS-JB17.6 | USB1 |
Questions
How big is the IOBoard PCB?
It measures 65 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the IOBoard use?
20 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the IOBoard KiCad files?
From the RunTheBot/erLay repository on GitHub, at the commit this page was made from: the board is IOBoard/IOBoard.kicad_pcb and its schematic IOBoard/IOBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the IOBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask RunTheBot before reusing the design.
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