4 layers67.7 × 10.5 mm
4 layers41 × 40 mm
Hardware for the Bloop NFC Scanner
- Size
- 41 × 40 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 56
- Pads
- 196
- Tracks, vias
- 237, 41
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Apr 2023
- Updated
- 14 Jul 2025
Overview
NFC2USB is an open-source printed circuit board by bloop-box, from the bloop-box/nfc-scanner-hardware repository on GitHub, published under the BSD-2-Clause licence. It is a 4-layer board of 41 × 40 mm with 44 parts on 56 nets, routed with 237 tracks and 41 vias.
It is built around the RP2040, W25Q32JVUUIQ and AMS1117-3.3. Its parts include 18 capacitors, 8 resistors, 4 ICs, 2 diodes and 2 switches. It belongs with the radio and wireless boards and the RP2040 boards of this library.
Main components
3
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q32JVUUIQ
USON-8(3x4)-40℃~+85℃ 100,000 cycles 10uA 133MHz 2.7V~3.6V 20 Years 32Mbit Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI USON-8(3x4) NOR FLASH ROHSWinbond ElecNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdBloop NFC Scanner Hardware
Connect an RC522 based NFC-Reader to your computer using USB
The project is based around a Raspberry Pi RP2040 microcontroller. It would have been possible to solve this with a much simpler controller but availability and pricing at the time of development as well as ease of use made the RP2040 with built in USB the best choice.
The board is designed using KiCAD 6 with production and assembly by JLCPCB in mind. All parts are selected to be available from JLCPCB at the time of writing and as many parts as possible are used from their basic library.
Case
A simple case design can be found in the case subfolder. It fits when the two boards are connected with standard angled 2.54mm pitch connectors as seen in the picture.
The two halves can be connected with self-tapping, countersunk M3x6 screws
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6, C7, C8, C9, C11, C12, C13, C17 |
| 3 | 10u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C1, C2, C3 |
| 3 | 1u | Capacitor_SMD:C_0402_1005Metric | C14, C15, C16 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C18, C19 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R8, R9 |
| 2 | 270R | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | VAL** | Panelization:mouse-bite-2x5mm-slot-onesided-v2 | mouse-bite-2mm-slot, mouse-bite-2mm-slot |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | ACT | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | BOOTSEL | Button_Switch_SMD:SW_SPST_TL3342 | SW1 |
| 1 | LOGO | My_Footprints:CutieMark5mmInverted | G*** |
| 1 | MODE | Button_Switch_SMD:SW_SPDT_PCM12 | SW2 |
| 1 | NFCModuleRC522 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | U1 |
| 1 | RDY | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U4 |
| 1 | USB_C_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q32JVUU | My_Footprints:USON8 (3x4) | U3 |
The 39 most common of 44 parts.
Questions
How big is the NFC2USB PCB?
It measures 41 × 40 mm and has 4 copper layers, 1.6 mm thick.
What parts does the NFC2USB use?
44 parts, built around the RP2040, W25Q32JVUUIQ and AMS1117-3.3. 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 NFC2USB KiCad files?
From the bloop-box/nfc-scanner-hardware repository on GitHub, at the commit this page was made from: the board is pcb/NFC2USB.kicad_pcb and its schematic pcb/NFC2USB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the NFC2USB design in my own project?
Its repository publishes it under the BSD-2-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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