4 layers95 × 55.5 mm
EinkPDA keyboard
TalismanDesign/PocketMage_PDA
An E-Ink PDA device using the ESP32 S3.
137 parts2kApache-2.0
4 layers95.8 × 82.4 mm
F3 backplane
arnarg/f3_backplane33Backplane PCB for Terramaster F2-221, adding NVMe SSD
- Size
- 95.8 × 82.4 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 50
- Nets
- 79
- Pads
- 339
- Tracks, vias
- 443, 241
- Pours
- 25
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 4 Apr 2024
- Updated
- 4 May 2024
Overview
F3 backplane is an open-source printed circuit board by arnarg, from the arnarg/f3_backplane repository on GitHub. It is a 4-layer board of 95.8 × 82.4 mm with 50 parts on 79 nets, routed with 443 tracks and 241 vias.
It is built around the MMBT3904. Its parts include 32 capacitors, 4 resistors, 4 ICs, 4 connectors and 1 transistor.
Main components
1README
README.mdF3 Backplane
F2 + 1 = F3, right?
This is a custom backplane PCB for Terramaster F2-221, which adds a socket for an NVMe SSD for booting an operating system from.
Blog post about creating this: https://codedbearder.com/posts/f3-backplane/
Ordering from JLCPCB
The gerber zip file can be found under fab/v1.0/f3_backplane.zip and is generated for JLCPCB. When ordering the PCB make sure to select impedance controlled stackup JLC04161H-7628.
Also, make sure to select Gold Fingers and 30°finger chamfered. It will recommend selecting an ENIG surface finish in order to get them actually gold plated, but as this is more expensive and the backplane shouldn't get removed and inserted into the motherboard often I just went with the standard HASL (with lead) surface finish and I haven't had any problems.
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 100nF | Capacitor_SMD:C_0603_1608Metric | C6, C11, C14, C15, C17, C20, C21, C22, C31, C34, C35, C37, C40, C41, C42 |
| 8 | 22uF | Capacitor_SMD:C_0805_2012Metric | C12, C13, C18, C19, C32, C33, C38, C39 |
| 4 | 10uF | Capacitor_SMD:C_0805_2012Metric | C10, C16, C30, C36 |
| 4 | 2R2 | Resistor_SMD:R_2512_6332Metric | R1, R2, R3, R4 |
| 4 | MountingHole_Pad | Mounting:MountingHole_3.5mm_Pad_Via_With_Alignment_Hole | H1, H2, H3, H4 |
| 4 | NCP45521 | Load_Switches:NCP45521 | U1, U2, U3, U4 |
| 2 | 100n | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 2 | 47u | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | SATA_Backplane | Connector_Backplane:Molex_0877011001 | J3, J4 |
| 1 | 22u | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | Bus_M.2_Socket_M | Connector_Backplane:Amphenol_MDT420M01001 | J2 |
| 1 | LOGO | Logo:f3_logo | G*** |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | PCIEx4_HOST | Connector_Backplane:PCIEx4_HOST | J1 |
Questions
How big is the F3 backplane PCB?
It measures 95.8 × 82.4 mm and has 4 copper layers, 1.61 mm thick.
What parts does the F3 backplane use?
50 parts, built around the MMBT3904. 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 F3 backplane KiCad files?
From the arnarg/f3_backplane repository on GitHub, at the commit this page was made from: the board is f3_backplane.kicad_pcb and its schematic connector.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the F3 backplane design in my own project?
Its repository states no licence, so its author keeps all rights: ask arnarg before reusing the design.
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