Unifying
About the Unifying PCB
Unifying is an open source Raspberry Pi PCB design by balthazar-space, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 120.9 × 78.8 mm, with 121 components from 65 distinct parts.
Its main chip is the H11615, from the Raspberry Pi family. Other key parts include the TPD4EUSB30, AP64501SP-13, FSUSB42MUX, USB2514B and AP22653W6-7. By type, the board carries 41 capacitors, 37 resistors, 21 connectors, 12 ICs, 4 diodes and 3 inductors.
From the project
Unifying PCB expansion for Balthazar
Open-hardware laptop computer modules description and concept.
These are electronic schematic modules as presented at https://balthazar.space/wiki/Balthazar with the main aim for team access. See the main repository for other designs.
Single PCB solution for connecting the three previously designed Balthazar modules (I/O, power supply, USB 2.0, 3.0 controllers, keyboard and adding Compute Module compatible FPGA boards. Aimed at setting a compatibility standard to widely accepted hardware standards. It has standardized 100 pin accomodating module for adding standard CM HAT modules based on…
Main components on the Unifying
Unifying bill of materials (BOM)
121 components, 65 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TPD4EUSB30 | USON-10_2.5x1.0mm_P0.5mm | U1, U5 |
| 1 | AP64501SP-13 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.95x4.9mm_Mask2.71x3.4mm_ThermalVias | U2 |
| 1 | FSUSB42MUX | MSOP-10_3x3mm_P0.5mm | U3 |
| 1 | USB2514B USB2514B-I/M2 | QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm | U4 |
| 1 | AP22653W6-7 AP22653W6 | SOT-23-6 | U6 |
| 1 | RT9742SNGV | SOT-23 | U7 |
| 2 | 74AHC1G126SE-7 74LVC1G07SE-7 Diodes Inc. | SOT-353_SC-70-5 | U8, U10 |
| 1 | SN74AUP2G06DCKR NC7WZ16 | SC-88-6_2x2.1mm | U9 |
| 1 | RT9742GGJ5 | SOT-23-5 | U11 |
| 1 | MagJack-A70-112-331N126 | TRJG0926HENL | U12 |
| 1 | DMP3013SFV-7 | Diodes_PowerDI3333-8 | Q1 |
| 1 | 24MHz | Crystal_SMD_EuroQuartz_X22-4Pin_2.5x2.0mm_HandSoldering | Y1 |
| 1 | Conn_01x02 | TerminalBlock_bornier-2_P5.08mm | J1 |
| 1 | 2199230-4 Bus_M.2_Socket_B | Conn_TE-M.2-0.5-67P-doublesided | J2 |
| 1 | USB_OTG | USB_Micro-B_EDAC_UCON00686 | J3 |
| 1 | Conn_01x04_Male | PinHeader_1x04_P2.00mm_Horizontal | J4 |
| 2 | 67643-0910 USB_A | USB_A_Molex_67643_Horizontal | J5, J6 |
| 1 | USB_MICRO | USB_Micro-B_EDAC_UCON00686 | J7 |
| 2 | HFJ122 Conn_01x22_Female | Hirose_FH12-22S-0.5SH_1x22-1MP_P0.50mm_Horizontal | J8, J9 |
| 1 | 208658-1051 GPDI0 | CONN-10029449-111RLF | J10 |
Show 45 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 208658-1051 GPDI1 | CONN-10029449-111RLF | J11 |
| 1 | nRpiBoot | PinHeader_1x02_P1.00mm_Vertical | J12 |
| 2 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J13, J14 |
| 1 | AudioOUT | Jack_3.5mm_PJ311_Horizontal | J15 |
| 1 | 503398-1892 Micro_SD_Card_Det | SDCARD_MOLEX_503398-1892 | J16 |
| 1 | THD-20-R | PinHeader_2x20_P2.54mm_Vertical | J17 |
| 1 | GLOBAL_EN | PinHeader_1x02_P1.00mm_Vertical | J18 |
| 1 | AudioAMP | PinHeader_1x04_P2.00mm_Horizontal | J19 |
| 1 | THD-02-R | PinHeader_2x02_P2.54mm_Vertical | J20 |
| 1 | MIC | PinSocket_1x06_P2.54mm_Vertical | J21 |
| 1 | H11615 ComputeModule4 | Raspberry-Pi-4-Compute-Module-noholes | Module1 |
| 1 | MMBZ5242BLT3G | D_SOT-23_ANK | D1 |
| 1 | VLMTG1401-GS08 LED Green | LED_0603_1608Metric | D3 |
| 1 | VLMS1300-GS08 LED Red | LED_0603_1608Metric | D4 |
| 1 | BAV99-HF BAV99 | SOT-23 | D5 |
| 2 | 2508051017Y0 FerriteBead | L_0805_2012Metric | FB1, FB2 |
| 1 | SRN6045TA-3R3Y SRN6045TA-3R3Y (3.3uH) | L_Bourns_SRP7028A_7.3x6.6mm | L2 |
| 1 | 04025C104KAT4A 100n 50v | C_0402_1005Metric | C1 |
| 10 | 04025C104KAT4A 100n | C_0402_1005Metric | C2, C10, C11, C22, C23, C24, C25, C26 +2 |
| 13 | 08053D106KAT4A 10u | C_0805_2012Metric | C3, C13, C14, C15, C16, C20, C21, C27 +5 |
| 6 | CC0805KKX5R6BB106 10u 10v | C_0805_2012Metric | C4, C5, C6, C7, C8, C9 |
| 1 | C0402C122J5GACTU 1.2nF | C_0402_1005Metric | C12 |
| 1 | 100uF | CP_EIA-7343-31_Kemet-D | C17 |
| 2 | 27pF | C_0402_1005Metric | C18, C19 |
| 1 | 100uF | CP_EIA-7132-20_AVX-U | C28 |
| 3 | 04026D104KAT4A 100n 6.3 | C_0402_1005Metric | C35, C36, C37 |
| 2 | 08056D476MAT2A 47u 6.3 | C_0805_2012Metric | C38, C39 |
| 1 | 100n | C_0402_1005Metric | C41 |
| 4 | PTN0402E1202BST1 12K 1% | R_0402_1005Metric | R1, R4, R17, R32 |
| 2 | DNP | R_0402_1005Metric | R2, R33 |
| 1 | CPF0402B10RE1 10R | R_0402_1005Metric | R3 |
| 6 | nf | R_0402_1005Metric | R5, R6, R7, R8, R28, R29 |
| 1 | AT0402FRE0747KL 47K 1% | R_0402_1005Metric | R9 |
| 2 | RT0402FRE0715KL 15K 1% | R_0402_1005Metric | R10, R19 |
| 1 | AT0402FRE0712KL 12K | R_0402_1005Metric | R11 |
| 2 | RT0402FRE072K2L 2.2K 1% | R_0402_1005Metric | R12, R13 |
| 4 | RT0402FRE0736KL 36K 1% | R_0402_1005Metric | R14, R15, R16, R18 |
| 2 | CRT0402-BY-1001GLF 1k | R_0402_1005Metric | R20, R23 |
| 2 | ERA-2VEB2200X 220 | R_0402_1005Metric | R21, R22 |
| 2 | MCS04020D1000BE000 100 | R_0402_1005Metric | R24, R25 |
| 2 | CPF0402B1K8E1 1K8 | R_0402_1005Metric | R26, R27 |
| 1 | 311-0.0GR 0R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R30 |
| 1 | nf | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R31 |
| 2 | 4K7 | R_0402_1005Metric | R34, R35 |
| 2 | 470R | R_0402_1005Metric | R36, R37 |
Unifying design files
The KiCad project lives in the balthazar-space/Unifying-PCB repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad/Unifying.kicad_pcb
- Schematickicad/Unifying.kicad_sch
- BOM1-click-bom.tsv
Unifying: common questions
What microcontroller does the Unifying use?
The Unifying is built around the H11615, from the Raspberry Pi family.
How big is the Unifying PCB?
The Unifying measures 120.9 × 78.8 mm, has 4 copper layers and is 1.58 mm thick.
How many components are on the Unifying?
121 components, from 65 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Unifying design files?
From the balthazar-space/Unifying-PCB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Unifying design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which balthazar-space chose for the repository.
Can I test firmware for the Unifying without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.
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