4 layers51.4 × 61 mm
2 layers80 × 40 mm
FlashStickCM4
NebraLtd/FlashStick9Open source USB Adapters for popular compute modules
- Size
- 80 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 148
- Pads
- 238
- Tracks, vias
- 190, 61
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Dec 2020
- Updated
- 14 Jun 2022
Overview
FlashStickCM4 is an open-source printed circuit board by NebraLtd, from the NebraLtd/FlashStick repository on GitHub. It is a 2-layer board of 80 × 40 mm with 20 parts on 148 nets, routed with 190 tracks and 61 vias.
It is built around the 74LVC1G07. Its parts include 3 resistors, 3 diodes, 2 connectors, 1 capacitor and 1 IC. It belongs with the computers and single-board computers boards of this library.
Main components
1README
Raspberry_Pi_Compute_Module_4/README.mdRaspberry Pi Compute Module 4 eMMC USB Programming Stick - CM4 FlashStick
This FlashStick is designed for programming the Raspberry Pi Compute Module version 4.
How To Use
Operation should be as simple as:
- Insert Compute Module 4 into FlashStick.
- Ensure switch is in position USB_BOOT.
- Plug into Computer.
- Load USB Boot Software (Or use Balena Etcher) to boot the CM into Programming Mode.
- Flash image like normal.
- Unplug stick from computer.
- Remove Compute Module.
Care should be taken when handling the module and CM, handle from edge to reduce risk of ESD
PCB Specification
- Thickness: 1.6mm
- Size: 40x80mm
- Colour: Whatever you like, we went for blue!
- Surface Finish: You'll likely find assembly easier with ENIG due to the Power ICs package.
- Stencil: Recommended, top only. No Frame Needed.
This PCB can be quickly ordered directly from PCB companies using the following links:
- JLCPCB - CN Based - ~ $30 -
- PCBWay - CN Based - ~ $60 -
- OSHPark - US Based - ~ $70 -
- Aisler - EU Based - ~ $55 -
Or upload the Gerbers / design files to your choice of Fab!
Components
The BOM for shopping is in this folder.
Alternatively it's also available at Octopart or on Digi-key
Assembly
We'll produce a little guide showing how we assemble them, and recommended pick and place order when doing it manually.
It's highly recommended for a Stencil to be used.
Open Source Hardware Certification
This project is released under the license shown here and is also certified as open source hardware by the Open Source Hardware Association:
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 2 | Fiducial | Fiducial:Fiducial_1.5mm_Mask3mm | FID1, FID2 |
| 1 | 330uF | Capacitor_SMD:CP_Elec_6.3x5.9 | C1 |
| 1 | 74LVC1G07 | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U1 |
| 1 | BLUE | LED_SMD:LED_0603_1608Metric | LED3 |
| 1 | GREEN | LED_SMD:LED_0603_1608Metric | LED2 |
| 1 | KiCad | FlashStickCM4:Logo_KiCad | LG2 |
| 1 | Nebra | FlashStickCM4:nebra | LG1 |
| 1 | Open Source | FlashStickCM4:open_source | LG3 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | LED1 |
| 1 | Recycling | FlashStickCM4:Logo_Recycling | LG4 |
| 1 | Rpi_CM4_ConnA | FlashStickCM4:DF40HC(3.0)-100DS-0.4v-CM4A | P1 |
| 1 | Rpi_CM4_ConnB | FlashStickCM4:DF40HC(3.0)-100DS-0.4v-CM4B | P2 |
| 1 | Rpi_CM4_Module | FlashStickCM4:RPi_Compute_Module_4 | MOD1 |
| 1 | SW_SPDT | FlashStickCM4:SW_SPDT_CL-SB-12B | SW1 |
| 1 | USB_A | FlashStickCM4:USB_A_H_PLUG_CNCTech_TH | JP1 |
| 1 | WEEE | Symbol:WEEE-Logo_4.2x6mm_SilkScreen | LG5 |
Questions
How big is the FlashStickCM4 PCB?
It measures 80 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FlashStickCM4 use?
20 parts, built around the 74LVC1G07. 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 FlashStickCM4 KiCad files?
From the NebraLtd/FlashStick repository on GitHub, at the commit this page was made from: the board is Raspberry_Pi_Compute_Module_4/FlashStickCM4.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the FlashStickCM4 design in my own project?
Its repository states no licence, so its author keeps all rights: ask NebraLtd before reusing the design.
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