4 layers23.9 × 44.5 mm
ATTINY3226
marsairforce/breakout_boards
Small circuit boards to assist with breadboard prototyping with SMD packages.
56 parts39Unlicense
2 layers30 × 65 mm
Pi zero header
LosVocelos/EWRWCEducational wheeled robot with camera
- Size
- 30 × 65 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 113
- Nets
- 125
- Pads
- 453
- Tracks, vias
- 867, 193
- Pours
- 15
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Nov 2023
- Updated
- 14 Mar 2025
Overview
Pi zero header is an open-source printed circuit board by LosVocelos, from the LosVocelos/EWRWC repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 30 × 65 mm with 113 parts on 125 nets, routed with 867 tracks and 193 vias.
It is built around the RP2040, TPS630701RNMR and W25Q128JVSIQ. Its parts include 39 capacitors, 32 resistors, 16 connectors, 6 ICs and 5 diodes. It belongs with 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)
TPS630701RNMR
VQFN-15-HR(2.5x3)-40℃~+125℃@(TJ) 1 2.4MHz 2A 2V~16V 50uA 5V Buck-Boost Buck-Boost Built-in Fixed Yes VQFN-15-HR(2.5x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
README
README.mdEWRWC
Educational wheeled robot with camera
Sources
These are the components (and their 3D models) I'm using in this project:
Modules
| Part | Component | Store page | 3D model |
|---|---|---|---|
| EWRWC Add-on | Custom PCB (described below) | None yet | Pi_zero_header.step |
| Brain (CPU) | Raspberry pi zero 2 w | RPishop - Zero 2 w | GrabCAD - Zero 2 w |
| Camera | Raspberry Pi camera V2 | RPishop - camera v2 | Thingiverse - Rpi Camera v2.1 |
| Camera cable (200 mm) | Camera Cable Standard - Mini | RPishop - camera cable | [blocked] |
| 2x DC motor | 2x GA12-N20 3V 500RPM | Techfun - motor 3V 500RPM | GrabCAD - N20 Gearmotor |
| Ball (support point) | Rotating ball 3PI N20 | Techfun - 3PI N20 | [blocked] |
| Battery holder | 18650 Li-Ion Holder | LaskaKit - 18650 Holder | GrabCAD - 18650 Holder |
| Battery | 18650 Li-Ion 2800mAh 10A | Techfun - INR18650-28HE | [blocked] |
These components are optional, but I have examples for them:
| Part | Component | Store page | 3D model |
|---|---|---|---|
| 3 axis Magnetometer | I2C HMC5883l | LaskaKit - HMC5883l | [blocked] |
| Laser distance sensor | I2C VL53L0X | LaskaKit - VL53L0X | [blocked] |
| Module of light intensity | I2C GY-302 BH1750 | RPishop - GY-302 | [blocked] |
These components are optional, but I don't use them:
| Part | Component | Store page | 3D model |
|---|---|---|---|
| Light intensity sensor | I2C VELM7700 | LaskaKit - VELM7700 | [blocked] |
| Temp + humidity sensor | I2C SHT30 | LaskaKit - SHT30 | [blocked] |
| Blue + Yellow OLED | SPI OLED 128x64 | LaskaKit - OLED 0.96" | [blocked] |
| Blue + Yellow OLED | I2C OLED 128x64 | LaskaKit - OLED 0.96" | [blocked] |
PCB (EWRWC Add-on)
I previously called the board a Pi-Zero-Header (that's why the files are called that way). But that name didn't grasp the functionality well, so I decided to call it EWRWC Add-on (I wanted to call it the HAT, but by board doesn't meet all requirements to be called that way).
List of parts used in the Add-on board:
| Part | Manufacturer | Component | Store page | Documentation |
|---|---|---|---|---|
| Microcontroller | Raspberry Pi | RP2040 | LCSC - RP2040 | rp2040-datasheet.pdf |
| MCU Flash memory | Winbond | Q25W128JV | JLCPCB - Q25W128JVSIQ | W25Q128JV.pdf |
| MCU Crystal | YXC | X322512MSB4SI | JLCPCB - X322512MSB4SI | YSX321SL.pdf |
| Battery management | Texas Instruments | BQ25792 | LCSC - BQ25792 | bq25792.pdf |
| 5V / 3V3 Regulator | Texas Instruments | TPS63070 | LCSC - TPS63070 | tps63070.pdf |
| 5V / 3V3 Regulator | Chilisin Elec | BMRA000404201R0MA1 | LCSC - BMRA000404201R0 | BMRx_Series.pdf |
| Motor Driver (2 H) | Toshiba | TB6612FNG | LCSC - TB6612FNG | TB6612FNG.pdf |
There are much more parts used in this project (inductors, buttons, connectors, LEDs and a bunch of capacitors and resistors), but only those in the table are crucialfor the functionality and choosing the rest of the parts.
TODO:
- Gather all sources
- Design the main PCB
- Complete the PCB
- Design chassis
- Print and ready the chassis
- Complete the hardware
- Write the software
- Write the framework
- Add some use for the camera
- Write documentation
- Finalize
- Play with it :)
Parts
113| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 100n | Capacitor_SMD:C_0402_1005Metric | C5, C6, C7, C9, C11, C12, C13, C14, C15, C18, C20, C22, C26, C35, C42, C49 |
| 7 | 10k | Resistor_SMD:R_0402_1005Metric | R2, R9, R14, R18, R23, R31, R32 |
| 6 | Conn_01x04 | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J5, J10, J11, J12, J15, J16 |
| 4 | 10u | Capacitor_SMD:C_0603_1608Metric | C1, C43, C50, C51 |
| 4 | 22u | Capacitor_SMD:C_0805_2012Metric | C24, C27, C41, C47 |
| 4 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3, J4, J7, J9 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm | H1, H2, H3, H4 |
| 4 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4 |
| 3 | 100k | Resistor_SMD:R_0402_1005Metric | R13, R16, R21 |
| 3 | 1u | Inductor_SMD:L_Chilisin_BMRA00040420 | L1, L2, L3 |
| 3 | 470R | Resistor_SMD:R_0402_1005Metric | R22, R29, R30 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D5 |
| 2 | 10u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C17, C19 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C29, C30 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R5 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C8, C10 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 33p | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 2 | 47n | Capacitor_SMD:C_0402_1005Metric | C32, C33 |
| 2 | 47u | Capacitor_SMD:C_0805_2012Metric | C45, C53 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R26, R27 |
| 2 | Conn_01x07 | Connector_PinHeader_1.27mm:PinHeader_1x07_P1.27mm_Vertical | J6, J13 |
| 2 | LED | LED_SMD:LED_0805_2012Metric | D3, D4 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_PTS810 | SW1, SW2 |
| 2 | TPS630701RNMR | RNM0015A:RNM0015A | U4, U5 |
| 1 | 100R | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | TH1 |
| 1 | 10k5 | Resistor_SMD:R_0402_1005Metric | R25 |
| 1 | 127k | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 12M | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 130k | Resistor_SMD:R_0402_1005Metric | R17 |
| 1 | 150k | Resistor_SMD:R_0402_1005Metric | R20 |
| 1 | 1n | Capacitor_SMD:C_0402_1005Metric | C31 |
| 1 | 2k2 | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 30k1 | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 3k01 | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 470k | Resistor_SMD:R_0402_1005Metric | R19 |
| 1 | 47u | Capacitor_SMD:C_1206_3216Metric | C36 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C34 |
| 1 | 5k23 | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 680R | Resistor_SMD:R_0402_1005Metric | R28 |
| 1 | 680k | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | 6k04 | Resistor_SMD:R_0402_1005Metric | R24 |
| 1 | Conn_01x03 | Connector_PinHeader_1.27mm:PinHeader_1x03_P1.27mm_Vertical | J14 |
| 1 | Conn_02x03_Top_Bottom | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J8 |
| 1 | PQ25792RQMR | RQM0029A-MFG:RQM0029A-MFG | U6 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | Raspberry_Pi_2_3 | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | TB6612FNG | Package_SO:SSOP-24_5.3x8.2mm_P0.65mm | U3 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HCTL_HC-TYPE-C-16P-01A | J2 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U2 |
Questions
How big is the Pi zero header PCB?
It measures 30 × 65 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pi zero header use?
113 parts, built around the RP2040, TPS630701RNMR and W25Q128JVSIQ. 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 Pi zero header KiCad files?
From the LosVocelos/EWRWC repository on GitHub, at the commit this page was made from: the board is PCB/Pi_zero_header.kicad_pcb and its schematic PCB/Pi_zero_header.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi zero header design in my own project?
Its repository publishes it under the GPL-3.0 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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