2 layers100 × 210 mm
2 layers113.8 × 87.3 mm
Core
papaya/Modulbox2Midibox files PCB kicad
- Size
- 113.8 × 87.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 110
- Pads
- 319
- Tracks, vias
- 1,583, 100
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 May 2024
- Updated
- 22 Oct 2026
Overview
Core is an open-source printed circuit board by papaya, from the papaya/Modulbox repository on GitHub. It is a 2-layer board of 113.8 × 87.3 mm with 37 parts on 110 nets, routed with 1,583 tracks and 100 vias.
It is built around the 74HC595 and BC817-40. Its parts include 18 connectors, 8 resistors, 3 ICs, 2 capacitors and 1 diode. It belongs with the STM32 boards of this library.
Main components
2README
README.mdParts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | CONN_02X05 | Pin_Headers:Pin_Header_Straight_2x05 | J4A1, J4B1, J5A1, J5B1, J8J9, J10A1, J10B1, J11E1, J16, J19 |
| 7 | R | Discret:R4-5 | R1, R2, R3, R4, R5, R12, R13 |
| 2 | C | Capacitors_ThroughHole:C_Radial_D5_L11_P2 | C1, C2 |
| 2 | CONN_02X08 | Pin_Headers:Pin_Header_Straight_2x08 | J15A1, J15B1 |
| 2 | POT | Potentiometers:Potentiometer_VishaySpectrol-Econtrim-Type36T | p1, p2 |
| 1 | 74HC595 | Socket_Strips:Socket_Strip_Straight_2x08 | IC2 |
| 1 | 74HCT541_PWR | Socket_Strips:Socket_Strip_Straight_2x10 | IC1 |
| 1 | BC817-40 | empreinte ksir:bc337 | T1 |
| 1 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02 | J17 |
| 1 | CONN_01X03 | Pin_Headers:Pin_Header_Straight_1x03 | J15S1 |
| 1 | CONN_2 | Pin_Headers:Pin_Header_Straight_1x02 | J2 |
| 1 | CONN_2 | Pin_Headers:Pin_Header_Straight_2x01 | J18 |
| 1 | D | Diodes_ThroughHole:Diode_DO-35_SOD27_Horizontal_RM10 | D1 |
| 1 | R-SIL_4 | w_pth_resistors:r-sil_5 | R33 |
| 1 | STM32F4_Discovery_Header | w_conn_misc:stm32f4_discovery_header | IC4 |
The 33 most common of 37 parts.
Questions
How big is the Core PCB?
It measures 113.8 × 87.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Core use?
37 parts, built around the 74HC595 and BC817-40. 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 Core KiCad files?
From the papaya/Modulbox repository on GitHub, at the commit this page was made from: the board is MB Hardware/Core32f4/Core32f4_V0.0/core.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Core design in my own project?
Its repository states no licence, so its author keeps all rights: ask papaya before reusing the design.
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