Acorn motherboard
About the Acorn motherboard PCB
Acorn motherboard is an open source Raspberry Pi PCB design by Twisted-Fields, published on GitHub. It is a 2-layer board measuring 106 × 102.3 mm, with 106 components from 67 distinct parts.
Its main chip is the DF40HC(3.0)-100DS-0.4V(58), from the Raspberry Pi family. Other key parts include the AOZ8904CIL, ISL54222AIUZ, INA181A2, TC7SH34FU,LJ(CT and MCP23016T-I/SO. By type, the board carries 25 resistors, 22 capacitors, 21 connectors, 12 diodes, 8 ICs and 7 transistors.
It belongs with the robotics & motion designs in this gallery.
From the project
PCB hardware designs in KICAD for Acorn, the precision farming rover from Twisted Fields.
This is the motherboard design used on Acorn, the precision farming rover from Twisted Fields.
This board provides motor control communication to four Odrive motor controllers via RS-485, e-stop control, motor power control, and more.
For more information please see http://community.twistedfields.com
Main components on the Acorn motherboard
Acorn motherboard bill of materials (BOM)
106 components, 67 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | AOZ8904CIL | AOZ8904CIL | U3, U4 |
| 1 | ISL54222AIUZ | ISL54222AIUZ | U5 |
| 1 | INA181A2 PDQ30-Q48-S5-D | CONV_PDQ30-Q48-S5-D | U6 |
| 2 | TC7SH34FU,LJ(CT buffer | SOT-353_SC-70-5 | U7, U8 |
| 1 | DF40HC(3.0)-100DS-0.4V(58) Compute_Module_4_Connectors | Raspberry-Pi-4-Compute-Module | U10 |
| 1 | MCP23016T-I/SO | MCP23016T-I&slash_SO | U11 |
| 1 | DMN10H220L-7 Si2328DS | SOT-23-3 | Q1 |
| 2 | C2758447 2N7002 ON Semiconductor | SOT-23-3 | Q2, Q3 |
| 4 | 2N7002 ON Semiconductor | SOT-23-3 | Q4, Q5, Q6, Q7 |
| 1 | UE27AC54100 USB_A | USB_A_Female_UE27AC54100 | J1 |
| 1 | 0022232021 Conn_01x02 | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J2 |
| 1 | SBH11-PBPC-D10-ST-BK Conn_02x10_Counter_Clockwise | PinHeader_2x10_P2.54mm_Vertical | J3 |
| 1 | USB4085-GF-A USB_C_Receptacle_USB2.0 | USB_C_Receptacle_GCT_USB4085 | J4 |
| 1 | 0826-1X1T-GH-F | 0826-1X1T-GH-F | J5 |
| 1 | PPTC202LFBN-RC Raspberry_Pi_2_3 | PinSocket_2x20_P2.54mm_Vertical | J6 |
| 1 | 0022272081 Conn_01x08 | Molex_KK-254_AE-6410-08A_1x08_P2.54mm_Vertical | J7 |
| 5 | 0022232041 Conn_01x04 | Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | J8, J9, J10, J14, J18 |
| 2 | 0022232031 Conn_01x03 | Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J11, J13 |
| 3 | 0022112052 Conn_01x05 | Molex_KK-254_AE-6410-05A_1x05_P2.54mm_Vertical | J12, J16, J17 |
| 1 | 1747981-1 | TE_1747981-1 | J15 |
Show 47 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | FH12-22S-0.5SH(55) Conn_01x22_Female | Hirose_FH12-22S-0.5SH_1x22-1MP_P0.50mm_Horizontal | J19, J20 |
| 1 | Conn_02x04_Odd_Even | PinHeader_2x04_P2.54mm_Vertical | J21 |
| 1 | 0ZCJ0050FF2G Polyfuse | Fuse_1206_3216Metric | F1 |
| 1 | TC33X-2-502E TC33X-2-103E Bourns Inc. | Trimpot_3.8mmx3.6mm_TC33X-2-103E | POT1 |
| 1 | PTS645SM43SMTR92 LFS RUN_SW C&K | Switch_Tactile_SMD_6x6mm_PTS645 | S1 |
| 4 | SW_MEC_5G SW_SPDT | Switch_Slide_9x4mm_ASE1E-2M | SW1, SW2, SW3, SW4 |
| 1 | TestPoint | TestPoint_Keystone_5015_Micro-Minature | TP1 |
| 1 | DDZ9702-7 15v/200mW Diodes Incorporated | SOD-123 | Z1 |
| 1 | MMSZ5255B-7-F 28v/500mW Diodes Incorporated | SOD-123 | Z2 |
| 1 | VTVS58ASMF-HM3-08 | D_SMF | D1 |
| 1 | SK32A-LTP D | DO214AC | D2 |
| 1 | VSS8D2M10HM3/I D | D_SMA | D3 |
| 1 | LTST-C150KRKT LED_RED | LED_1206_3216Metric | D4 |
| 1 | SML-LX1206SOC-TR LED_ORANGE | LED_1206_3216Metric | D5 |
| 4 | COM-11821 WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D6, D7, D8, D9 |
| 1 | LTST-C150KGKT LED_GREEN | LED_1206_3216Metric | D10 |
| 2 | CBRDFSH2-100 TR13 CD-HD201 | CBRDFSH2 | D11, D12 |
| 1 | 10UH L | VLCF4028T-1R2N2R7-2 | L1 |
| 1 | 20P 0.1uF | C_0805_2012Metric | C1 |
| 1 | 20P 47uF | CP_Radial_D8.0mm_P3.50mm | C2 |
| 3 | 0.1uF | C_0805_2012Metric | C3, C7, C8 |
| 1 | 100N 0.1uF | C_0805_2012Metric | C4 |
| 1 | MAL214699801E3 22uF | CP_Elec_8x6.5 | C5 |
| 6 | DNP | C_0805_2012Metric | C9, C10, C11, C12, C13, C16 |
| 2 | 100N DNP | C_0805_2012Metric | C14, C15 |
| 4 | CC0805ZKY5V6BB106 10uF | C_0805_2012Metric | C17, C18, C19, C21 |
| 2 | UWF1A101MCL1GS 100uF | CP_Elec_8x6.5 | C20, C22 |
| 1 | 33pF | C_0805_2012Metric | C23 |
| 2 | RMCF0805FT2K10 2.2k 1% | R_0805_2012Metric | R1, R2 |
| 1 | C270948 24.1k/1% | R_0805_2012Metric | R3 |
| 1 | 1.1K 5.1k | R_0805_2012Metric | R4 |
| 1 | 5.1k | R_0805_2012Metric | R5 |
| 1 | 5.1K 249k | R_0805_2012Metric | R6 |
| 1 | 5.1K 470R | R_0805_2012Metric | R7 |
| 1 | 1.1K 470R | R_0805_2012Metric | R8 |
| 1 | 10K 51k | R_0805_2012Metric | R9 |
| 1 | 10K 220R | R_0805_2012Metric | R10 |
| 1 | 1k | R_0805_2012Metric | R11 |
| 3 | 100R | R_0805_2012Metric | R12, R14, R15 |
| 1 | 10k | R_0805_2012Metric | R13 |
| 2 | C309610 1k | R_0805_2012Metric | R16, R22 |
| 2 | RC0805FR-0710KL 2.2k 1% | R_0805_2012Metric | R17, R18 |
| 2 | C309610 100R | R_0805_2012Metric | R19, R23 |
| 1 | C309610 DNP | R_0805_2012Metric | R20 |
| 1 | C309610 10k | R_0805_2012Metric | R21 |
| 1 | 10K 100R | R_0805_2012Metric | R24 |
| 1 | 3.9k | R_0805_2012Metric | R25 |
Acorn motherboard design files
The KiCad project lives in the Twisted-Fields/acorn-robot-electronics repository on GitHub; these links point at the commit this page was built from.
Acorn motherboard: common questions
What microcontroller does the Acorn motherboard use?
The Acorn motherboard is built around the DF40HC(3.0)-100DS-0.4V(58), from the Raspberry Pi family.
How big is the Acorn motherboard PCB?
The Acorn motherboard measures 106 × 102.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Acorn motherboard?
106 components, from 67 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 Acorn motherboard design files?
From the Twisted-Fields/acorn-robot-electronics 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 Acorn motherboard design in my own project?
The repository has no license, so all rights stay with Twisted-Fields. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Acorn motherboard 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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