Source:
crate.md, a scraped Blueprint project export supplied by the user.Scope: Consolidated reconstruction of the source's BOM, fabrication process, wiring stages, bring-up procedure, assembly sequence, high-level architecture, source-supported warnings/gaps, and build checklist.
Important: This document stays grounded in the scraped source. Where the source does not provide exact wiring, pinouts, dimensions, firmware details, or electrical values, those details are explicitly marked as unavailable rather than invented.
The source describes a custom portable computer / laptop-style enclosure built around:
- A salvaged laptop motherboard
- A 14.8V 4S LiPo battery pack
- A 4S 40A BMS
- A ZPM-20V PD trigger board
- An XL6009 DC-DC buck-boost converter
- A 15.6-inch 1920×1080 IPS display
- An internal powered 4-port USB 3.0 hub
- A Samsung T7 1TB portable SSD
- A compact 60% mechanical keyboard PCB
- A USB touchpad module
- An OLED battery-percentage monitor
- A panel-mounted master power switch
- Custom 3D-printed structural parts, mounts, bezels, rails, and a stylus holder
The scraped BOM reports:
- 26 total parts
- $491.50 listed total cost
The source categorizes the build into four major phases:
- Fabricate
- Wire
- Bring-up
- Assemble
| Qty | Component | Listed Cost |
|---|---|---|
| 1 | ZPM-20V PD Trigger Board | $12.00 |
| 1 | XL6009 DC-DC Buck-Boost Converter | $8.00 |
| 1 | 14.8V 4S LiPo Battery Pack | $45.00 |
| 1 | 4S 40A 14.8V BMS Board | $15.00 |
| 1 | 4-Port Industrial USB 3.0 Hub PCBA | $25.00 |
| 1 | Panel Mount Heavy Duty Rocker Switch | $6.00 |
| Qty | Component | Listed Cost |
|---|---|---|
| 1 | Salvaged Laptop Motherboard | $0.00 |
| 1 | Samsung T7 1TB Portable SSD | $90.00 |
| 1 | Compact 60% Mechanical Keyboard PCB | $45.00 |
| 1 | USB Touchpad Module | $25.00 |
| Qty | Component | Listed Cost |
|---|---|---|
| 1 | OLED Battery Percentage Monitor | $10.00 |
| 1 | 15.6 inch 1920x1080 IPS LED Screen | $120.00 |
| Qty | Component | Listed Cost |
|---|---|---|
| 1 | Enclosure | $8.00 |
| 1 | Side I/O Panel | $8.00 |
| 2 | Keyboard Dock Rail | $10.00 listed |
| 1 | Mechanism | $10.00 |
| 50 | CNC Kitchen M3x4.2mm Threaded Inserts | $7.50 |
| 100 | Metric M3x10 Socket Head Cap Screws | $8.00 |
| 1 | Universal Capacitive Stylus Pen | $10.00 |
The source lists nine printed components:
- Motherboard Tray
- USB-C PD Mount
- BMS Mounting Bracket
- Power Switch Mount
- Battery Fuel Gauge Display Mount
- Powered Internal USB Hub Mount
- Custom 3D Printed 15-inch Bezel
- Custom 3D Printed Bezel / Keyboard and Trackpad Mount
- Custom 3D Printed Stylus Mount
The source's 3D-print category is listed as nine parts / $47.00.
The source specifies:
- 3D printer with PETG capability
- Soldering iron with fine tip
- M3 hex key set
- Wire strippers and crimping tool
- Multimeter
- Heat gun
- Soldering iron and lead-free solder
The source assumes:
- Moderate experience with 3D-printer calibration and slicer settings
- Basic electronics soldering skills for BMS and regulator wiring
- Familiarity with M3 threaded-insert installation
- Firmware for system power management is already compiled
Print the primary structural components:
- Motherboard Tray
- Side I/O Panel
- Enclosure
- Keyboard Dock Rails
- Mechanism
- Custom 3D Printed 15-inch Bezel / 15-inch Display Frame
The source associates this stage with a PETG-capable 3D printer and M3 hex key set.
Print:
- USB-C PD Mount
- BMS Mounting Bracket
- Power Switch Mount
- Battery Fuel Gauge Display Mount
- Powered Internal USB Hub Mount
- Custom 3D Printed Bezel / Keyboard and Trackpad Mount
- Custom 3D Printed Stylus Mount / Stylus Holster
Install the CNC Kitchen M3x4.2mm threaded inserts into the relevant 3D-printed housings.
The source specifically associates the inserts with:
- Motherboard Tray
- Side I/O Panel
- Enclosure
- Keyboard and Trackpad Mount
Before final wiring, test-fit:
- Salvaged Laptop Motherboard
- 14.8V 4S LiPo Battery Pack
- ZPM-20V PD Trigger Board
- XL6009 DC-DC Buck-Boost Converter
The stated purpose is to ensure physical clearances.
Source limitation: The scraped file provides wiring-stage descriptions and component relationships, but it does not contain a complete electrical schematic, wire gauge specification, connector pinout, motherboard power pinout, USB hub wiring diagram, or exact converter settings.
The source instructs the builder to solder the battery-management wiring between:
14.8V 4S LiPo Battery Pack
│
▼
4S 40A BMS Board
Associated components:
- 14.8V 4S LiPo Battery Pack
- 4S 40A 14.8V BMS Board
This is a high-current battery system. Follow the exact BMS terminal arrangement for the specific board being used; the scrape does not provide its terminal-level wiring.
The source specifies a power-input and regulation stage containing:
Power input
│
▼
ZPM-20V PD Trigger Board
│
▼
XL6009 DC-DC Buck-Boost Converter
│
▼
Motherboard voltage supply
A panel-mounted heavy-duty rocker switch is also included as the master system power switch.
Associated components:
- ZPM-20V PD Trigger Board
- XL6009 DC-DC Buck-Boost Converter
- Panel Mount Heavy Duty Rocker Switch
The source does not state the exact trigger-board configuration, XL6009 output voltage, current limit, connector type, or exact switch placement in the electrical circuit.
The source instructs the builder to connect:
- 4-Port Industrial USB 3.0 Hub PCBA
- OLED Battery Percentage Monitor
- 15.6-inch IPS display
- Salvaged laptop motherboard
This stage is described as:
Connect display, hub, and I2C peripherals.
The source does not provide exact USB, I2C, display-interface, or motherboard connector pinouts.
The source supports the following conceptual topology:
Salvaged Laptop Motherboard
│
│ USB
▼
4-Port USB 3.0 Hub
│ │ │
│ │ └── Keyboard
│ └───────── Touchpad
└──────────────── SSD / other USB device
The exact port assignments are not specified in the scrape.
The source includes an OLED Battery Percentage Monitor and later instructs the builder to calibrate its communication.
Conceptually:
Battery / power system
│
▼
OLED Battery Percentage Monitor
The source does not specify the exact sensing method, bus, voltage divider, current-sensing arrangement, or I2C address.
Based strictly on the source's stated relationships:
14.8V 4S LiPo Battery
│
▼
4S 40A BMS
│
│
Battery/System Bus
│
┌────────┴────────┐
│ │
▼ ▼
System Power Power / charging
distribution input
│ │
│ ▼
│ ZPM-20V PD Trigger
│ │
│ ▼
│ XL6009 Buck-Boost
│ │
└──────────► Laptop Motherboard
│
┌─────────────┼──────────────┐
│ │ │
▼ ▼ ▼
Display USB Hub Other system
│
┌───────────┼────────────┐
▼ ▼ ▼
Keyboard Touchpad SSD
This is a high-level reconstruction from the scraped build stages. It is not an extracted original schematic.
┌────────────────────────────────────────────────────────────┐
│ CUSTOM ENCLOSURE │
│ │
│ ┌──────────────────────────────────────────────────────┐ │
│ │ 15.6" IPS DISPLAY │ │
│ └──────────────────────────────────────────────────────┘ │
│ │
│ ┌──────────────────────┐ ┌───────────────────────────┐ │
│ │ Keyboard / Trackpad │ │ I/O SIDE PANEL │ │
│ │ Assembly │ │ │ │
│ └──────────────────────┘ └───────────────────────────┘ │
│ │
│ ┌──────────────────────────────────────────────────────┐ │
│ │ Salvaged Laptop Motherboard │ │
│ └──────────────────────────────────────────────────────┘ │
│ │
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────────┐ │
│ │ 4S BMS │ │ XL6009 │ │ USB 3.0 Hub │ │
│ └─────────────┘ └─────────────┘ └─────────────────┘ │
│ │
│ ┌────────────────────┐ ┌──────────────────────────┐ │
│ │ 4S LiPo Battery │ │ OLED Battery Percentage │ │
│ └────────────────────┘ └──────────────────────────┘ │
│ │
└────────────────────────────────────────────────────────────┘
The source instructs the builder to validate:
- BMS charging behavior
- Battery protection disconnect
- 4S LiPo battery
- ZPM-20V PD trigger behavior
Use a multimeter.
The source does not provide the expected BMS cutoff values or charger configuration.
Verify regulated voltage levels at:
- Motherboard power input
- Display power headers
Use a multimeter.
Associated components:
- XL6009
- Salvaged laptop motherboard
- 15.6-inch IPS display
The exact target voltage is not stated in the scrape.
Do not infer the correct motherboard voltage from the 14.8V battery rating. Determine it from the specific salvaged motherboard's power requirements.
Verify USB data connectivity and peripheral detection.
The source specifically lists:
- 4-Port Industrial USB 3.0 Hub
- Samsung T7 1TB SSD
- Compact 60% Mechanical Keyboard PCB
- USB Touchpad Module
A conceptual test is:
Motherboard
│
▼
USB 3.0 Hub
┌──┼─────────────┐
▼ ▼ ▼
SSD Keyboard Touchpad
Calibrate the OLED battery percentage monitor and verify its communication with the system.
The source associates this with the powered internal USB hub and battery gauge display.
Secure the following to the primary tray:
- Motherboard
- 14.8V 4S LiPo battery
- Powered internal USB hub
Use the motherboard tray and powered USB hub mount.
Install:
- Custom 3D-printed 15-inch bezel
- 15.6-inch IPS display
- Side I/O panel
- Keyboard dock rails / mechanism
The source's goal is to align the display frame and side I/O panel.
Install:
- Power switch
- OLED battery gauge
- Keyboard/trackpad assembly
Use the relevant 3D-printed mounts and M3x10 socket-head cap screws.
Route internal cables and secure them with strain relief.
Install:
- Stylus mount
- Universal capacitive stylus
The source explicitly calls for cable routing, strain relief, and accessory installation.
- Print motherboard tray
- Print side I/O panel
- Print enclosure
- Print keyboard dock rails
- Print mechanism
- Print 15-inch display bezel
- Print USB-C PD mount
- Print BMS bracket
- Print power-switch mount
- Print battery-gauge mount
- Print powered USB-hub mount
- Print keyboard/trackpad bezel/mount
- Print stylus mount
- Install M3 heat-set inserts
- Verify insert alignment
- Verify threaded holes are clear
- Test-fit motherboard
- Test-fit 4S battery
- Test-fit ZPM-20V board
- Test-fit XL6009
- Check clearance
- Check cable-routing space
- Identify exact 4S BMS model and terminal labels
- Verify battery connector polarity
- Connect battery to BMS according to the specific BMS documentation
- Verify BMS output before connecting the rest of the system
- Configure ZPM-20V PD trigger
- Connect PD trigger output
- Configure XL6009 output to the exact motherboard requirement
- Verify XL6009 output with a multimeter
- Install master power switch
- Connect motherboard power
- Connect display
- Connect internal USB hub
- Connect SSD
- Connect keyboard
- Connect touchpad
- Connect OLED battery gauge
- Add strain relief to cables
- Perform continuity testing
- Verify there are no accidental shorts
- Check battery voltage
- Check BMS output
- Test BMS protection
- Validate charging cycle
- Verify ZPM-20V PD trigger
- Verify XL6009 output
- Verify motherboard power input
- Verify display power
- Verify all system grounds
- Confirm motherboard powers on
- Confirm display initializes
- Confirm keyboard input
- Confirm touchpad input
- Confirm USB hub detection
- Confirm SSD detection
- Confirm other USB peripherals
- Verify OLED gauge communication
- Calibrate battery percentage
- Verify displayed battery state against actual battery condition
- Check display alignment
- Check keyboard alignment
- Check trackpad alignment
- Check I/O panel alignment
- Check switch access
- Check hinge/mechanism movement
- Check cable strain relief
- Check battery access
The source calls the XL6009 the "Motherboard Voltage Regulator" but does not state the target output voltage.
Do not assume 14.8V battery voltage is the motherboard input voltage.
Determine the exact input requirements of the salvaged laptop motherboard before powering it.
The source says to solder BMS wiring but does not provide:
- BMS terminal diagram
- Cell-tap arrangement
- Connector pinout
- Wire gauge
- Fuse specification
- Protection thresholds
Use the documentation for the exact 4S 40A BMS board.
The source includes a ZPM-20V PD trigger board and a 4S battery/BMS but does not explain the complete charging path.
The source only says to validate the BMS charging cycle and battery protection disconnect.
Do not assume the PD trigger directly charges the 4S pack.
The source does not provide:
- Output voltage
- Current limit
- Input/output connector arrangement
- Efficiency expectations
- Thermal requirements
These need to be established for the actual motherboard and display.
The source identifies the display as a 15.6-inch 1920×1080 IPS LED screen but does not specify:
- Panel model
- Interface
- Controller board
- Input connector
- Required voltage
- Backlight power requirements
The source specifies a powered 4-port USB 3.0 hub and lists the SSD, keyboard, and touchpad, but does not specify which hub port is assigned to which peripheral.
The source calls the OLED unit an "OLED Battery Percentage Monitor" but does not provide its exact sensing circuit or communications configuration.
The scrape names the enclosure and printed components but does not expose:
- Overall chassis dimensions
- Wall thickness
- Display cutout dimensions
- Keyboard dimensions
- Hinge/mechanism geometry
- Battery compartment dimensions
- I/O cutout measurements
The source assumes system power-management firmware is already compiled.
It does not provide:
- Firmware source
- Build system
- Configuration
- Flashing instructions
- Debug procedure
The strongest architecture that can be established from the scrape is:
┌──────────────────────┐
│ 14.8V 4S LiPo Pack │
└──────────┬───────────┘
│
▼
┌──────────────────────┐
│ 4S 40A BMS │
└──────────┬───────────┘
│
▼
┌──────────────────────┐
│ System Power Path │
└──────────┬───────────┘
│
┌──────────────┴──────────────┐
│ │
▼ ▼
┌────────────────┐ ┌─────────────────┐
│ PD Input Stage │ │ Battery Gauge │
│ ZPM-20V │ │ OLED Monitor │
└───────┬────────┘ └─────────────────┘
│
▼
┌────────────────┐
│ XL6009 │
│ DC-DC │
└───────┬────────┘
│
▼
┌───────────────────────┐
│ Salvaged Laptop │
│ Motherboard │
└───────┬───────────────┘
│
┌─────────┼──────────────┐
│ │ │
▼ ▼ ▼
Display USB Hub Internal I/O
│
┌─────┼─────┐
▼ ▼ ▼
SSD Keyboard Touchpad
Again, this represents the relationships explicitly described by the scraped build stages, not a verified electrical schematic.
- Main enclosure printed
- Motherboard tray printed
- Side I/O panel printed
- Display bezel printed
- Keyboard/trackpad mount printed
- Keyboard dock rails printed
- Mechanism printed
- BMS bracket printed
- USB-C PD mount printed
- Power switch mount printed
- Battery gauge mount printed
- USB hub mount printed
- Stylus mount printed
- All required M3 heat-set inserts installed
- Motherboard test-fitted
- Battery test-fitted
- BMS test-fitted
- PD trigger test-fitted
- XL6009 test-fitted
- USB hub test-fitted
- Display test-fitted
- Battery gauge test-fitted
- Keyboard test-fitted
- Touchpad test-fitted
- BMS wiring completed
- BMS polarity checked
- Battery output verified
- PD trigger configured
- XL6009 configured
- XL6009 output verified independently
- Master power switch installed
- Motherboard power verified
- Display power verified
- USB hub power verified
- Continuity check completed
- No-short check completed
- Display connected
- USB hub connected
- SSD connected
- Keyboard connected
- Touchpad connected
- Battery gauge connected
- USB devices detected
- Motherboard secured
- Battery secured
- BMS secured
- USB hub secured
- Display bezel installed
- Display aligned
- Keyboard mounted
- Trackpad mounted
- Side I/O panel aligned
- Power switch secured
- Cables routed
- Strain relief installed
- Stylus mount installed
- Final fasteners installed
- System powers on
- Display works
- Keyboard works
- Touchpad works
- SSD works
- USB hub works
- Battery gauge works
- Charging/protection behavior verified
- Power rails remain within required limits
- No excessive heat
- No loose cables
- No mechanical interference
- Final enclosure fit verified
- BOM
- Component quantities
- Listed costs
- Tool requirements
- Fabrication sequence
- 3D-printed component list
- BMS wiring stage
- PD/regulator wiring stage
- Display/USB hub/peripheral wiring stage
- Continuity and voltage verification stage
- BMS bring-up stage
- Regulator/display voltage verification stage
- USB peripheral testing stage
- Battery gauge calibration stage
- Mechanical assembly sequence
- Exact electrical schematic
- Exact BMS terminal wiring
- Exact battery connector pinout
- Exact charger topology
- Exact XL6009 target voltage
- Exact motherboard input voltage
- Exact display interface
- Exact USB hub topology
- Exact battery gauge circuitry
- Exact chassis dimensions
- Firmware source
- Firmware configuration
The scrape is sufficient to reproduce the overall physical concept and build workflow, but it is not sufficient to safely reproduce the electrical system without identifying the exact motherboard, BMS, PD trigger, regulator, display, and battery hardware and determining their required voltages and interfaces.
The safest reconstruction workflow is:
Scraped Blueprint
│
├── Directly reproduce
│ ├── Mechanical design
│ ├── BOM
│ ├── Fabrication sequence
│ └── Assembly sequence
│
├── Verify against exact hardware
│ ├── Battery/BMS
│ ├── PD trigger
│ ├── XL6009
│ ├── Motherboard
│ └── Display
│
└── Reconstruct separately
├── Exact power schematic
├── Connector pinouts
├── USB topology
├── Battery-gauge circuit
└── Firmware
Do not treat the high-level diagrams in this document as a verified electrical schematic.