4 layers76.8 × 54 mm
4 layers50 × 30 mm
ProtoB
X65/schematic8X65 hardware schematic
- Size
- 50 × 30 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 67
- Pads
- 256
- Tracks, vias
- 505, 125
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 13 Mar 2024
- Updated
- 3 Aug 2025
Overview
ProtoB is an open-source printed circuit board by X65, from the X65/schematic repository on GitHub. It is a 4-layer board of 50 × 30 mm with 63 parts on 67 nets, routed with 505 tracks and 125 vias.
It is built around the RP2040 and NCP115ASN330. Its parts include 21 resistors, 18 capacitors, 5 connectors, 4 ICs and 3 switches. It belongs with the retro computing and games boards and the RP2040 and RP2350 boards of this library.
Main components
2
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
NCP115ASN330
TSOP-5-40℃~+85℃@(Tj) 1 280mV@(300mA) 3.3V 300mA 5.5V 70dB@(1kHz) 70uVrms Fixed Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive TSOP-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSonsemiVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdX65
Modern 8-bit microcomputer
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C2, C4, C5, C6, C8, C9, C13, C14, C15, C16 |
| 9 | 270 | Resistor_SMD:R_0402_1005Metric | R10, R12, R13, R14, R15, R16, R17, R18, R19 |
| 8 | 2k2 | Resistor_SMD:R_0402_1005Metric | R1, R3, R6, R7, R8, R9, R11, R20 |
| 6 | 1u | Capacitor_SMD:C_0402_1005Metric | C1, C3, C7, C11, C22, C24 |
| 5 | TestPoint_Probe | TestPoint:TestPoint_Pad_1.0x1.0mm | TP0, TP1, TP2, TP3, TP7 |
| 3 | SW_Push | picodvi:SW_SPST_PTS815 | SW1, SW2, SW3 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C10, C12 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D1, D2 |
| 1 | 02x04 | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J4 |
| 1 | 12 M | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 4k7 | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | DNF | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | NCP115ASN330 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U2 |
| 1 | NOT_HDMI_A | picodvi:HDMI-SS-53000 | J5 |
| 1 | RP2040 | picodvi:QFN-56_EP_7x7_Pitch0.4mm | U1 |
| 1 | S70KL128 | picodvi:S70KS128 | U4 |
| 1 | USB_OTG | Connector_USB:USB_Micro-B_Molex-105017-0001 | J1 |
| 1 | W25Q16JV | Package_SON:WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4mm | U3 |
The 59 most common of 63 parts.
Questions
How big is the ProtoB PCB?
It measures 50 × 30 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ProtoB use?
63 parts, built around the RP2040 and NCP115ASN330. 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 ProtoB KiCad files?
From the X65/schematic repository on GitHub, at the commit this page was made from: the board is protoB/protoB.kicad_pcb and its schematic protoA/protoA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ProtoB design in my own project?
Its repository states no licence, so its author keeps all rights: ask X65 before reusing the design.
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