2 layers40 × 40 mm
BL R8812AF1 mount
OpenIPC/hardware
A collection of hardware developments by the OpenIPC team
18 parts33MIT
2 layers65 × 33.4 mm
BL R8812AF1 2x mount
OpenIPC/hardware33A collection of hardware developments by the OpenIPC team
- Size
- 65 × 33.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 28
- Pads
- 100
- Tracks, vias
- 122, 41
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Apr 2023
- Updated
- 30 Oct 2024
Overview
BL R8812AF1 2x mount is an open-source printed circuit board by OpenIPC, from the OpenIPC/hardware repository on GitHub, published under the MIT licence. It is a 2-layer board of 65 × 33.4 mm with 28 parts on 28 nets, routed with 122 tracks and 41 vias.
It is built around the SL2.1A and LDL1117S33R. Its parts include 6 capacitors, 5 connectors, 4 ICs, 3 resistors and 3 diodes.
Main components
2
SL2.1A
SOP-160℃~+70℃ 120mA 2.5mA 4 4V~5.25V USB 2.0 USB Hub SOP-16 USB HUB Controllers ROHSCoreChipsUSB Converters
LDL1117S33R
SOT-223-4-40℃~+125℃@(Tj) 1 1.2A 18V 3.3V 500uA 600mV@(1.2A) 60uVrms 87dB@(120Hz) Fixed Over Current Protection、Thermal Shutdown Positive SOT-223-4 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
BL-R8812AF1 2x mount/README.md
A Radxa Zero 3W stackable double BL-R8812AF1 board
Note this board has problems!
The board is often not recognised by the Radxa on boot and needs re-plugging before it is detected by the Radxa. Sometimes it has this problem then powered by a BEC and not when powered from USB. I think this is an issue with this USB hub chip, and this issue has been reproduced by another user. I will update this page if/when a fix is found.
The board integrates an SL2.1A USB hub chip which splits a single USB interface into 4 interfaces: two are used by the WiFi modules, and two additional ones are broken out for use with anything else (keyboard for configuration, USB stick, more WiFi dongles etc.).
HOW TO MAKE
You can order the PCB by sending the gerber files in the .zip to a PCB manufacturer. I have also included the source Kicad project files if you want to make any modifications.
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_4mm | H1, H2, H3, H4 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C5, C6 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3 |
| 3 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D2, D3 |
| 3 | USB_A | Connector_USB:USB_A_Molex_67643_Horizontal | J1, J4, J5 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C3 |
| 2 | Conn_01x04_Pin | Własne części:PinHeader_1x04_P2.54mm_Vertical | J2, J3 |
| 2 | ~ | Własne części:BL-R8812AF1 | U3, U4 |
| 1 | 12MHz | Crystal:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | LDL1117S33R | LDL1117S33R:SOT223_STM | U2 |
| 1 | LOGO | Własne części:Open source logo 10mm | G*** |
| 1 | LOGO | Własne części:OpenIPC logo 30mm | G*** |
| 1 | SL2.1A | Package_SO:SOIC-16_4.55x10.3mm_P1.27mm | U1 |
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Questions
How big is the BL R8812AF1 2x mount PCB?
It measures 65 × 33.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BL R8812AF1 2x mount use?
28 parts, built around the SL2.1A and LDL1117S33R. 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 BL R8812AF1 2x mount KiCad files?
From the OpenIPC/hardware repository on GitHub, at the commit this page was made from: the board is BL-R8812AF1 2x mount/BL-R8812AF1 2x mount.kicad_pcb and its schematic 26x26mm whoop BL-R8812AF1 mount/BL-R8812AF1 mount.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BL R8812AF1 2x mount design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).