2 layers65 × 56 mm
2 layers65 × 30 mm
Pi zero hat
Doenec/pi-hat1collection of different shields to be stacked in raspberry pi
- Size
- 65 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 30
- Nets
- 46
- Pads
- 124
- Tracks, vias
- 161, 87
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Jun 2025
- Updated
- 13 Jun 2025
Overview
Pi zero hat is an open-source printed circuit board by Doenec, from the Doenec/pi-hat repository on GitHub, published under the MIT licence. It is a 2-layer board of 65 × 30 mm with 30 parts on 46 nets, routed with 161 tracks and 87 vias.
It is built around the DS1307Z+T&R, 1N5819WS and Q13FC1350000400, with the CL31A476MPHNNNE, CR1220-2 and KT-0603R among its other parts. Its parts include 6 capacitors, 6 resistors, 4 connectors, 3 diodes and 2 ICs.
Main components
7
DS1307Z+T&R
SOIC-80℃~+70℃ 1.5mA 300nA 4.5V~5.5V Backup power management and battery charging、InsideSRAM/NVRAM、Programmable clock output External I2C SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky DiodesQ13FC1350000400
SMD3215-2PSMD3215-2P Crystals ROHSSeiko EpsonCrystals
CL31A476MPHNNNE
120610V 47uF X5R ±20% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CR1220-2
--40~80℃ Battery base CR1220 Phosphor bronze - Battery holder base ROHSQ&JButton And Strip Battery Connector
KT-0603R
0603-40℃~+85℃ 1.6mm x 0.8mm square LED 1.8V~2.4V 120° 20mA 300mcd 40mW 615nm~630nm 645nm Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
WS2812E-V5
SMD5050-4P0.6mA 1.57mm 1000mcd 110mcd 120us 2kHz 3.7V~5.3V 300ns 320mcd 451nm 523nm 5mm 5mm 623nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit Top-mount SMD5050-4P RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.mdpi-hat
collection of different shields to be stacked in raspberry pi
Parts
30| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10K | Resistor_SMD:R_0402_1005Metric | R5, R20, R21, R24, R25 |
| 4 | 100nF | Capacitor_SMD:C_0402_1005Metric | C4, C6, C30, C33 |
| 4 | MountingHole_2.7mm_M2.5 | MountingHole:MountingHole_2.7mm_M2.5 | MH1, MH2, MH5, MH6 |
| 2 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | CONN | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6, J10 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C34 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323 | D9 |
| 1 | 32.768Khz | Crystal:Crystal_SMD_G8-2Pin_3.2x1.5mm | Y1 |
| 1 | 47uF | Capacitor_SMD:C_1206_3216Metric | C10 |
| 1 | Ai-Thinker-Ra-01 | RF_Module:Ai-Thinker-Ra-01-LoRa | U13 |
| 1 | Battery_Cell | nodemcu:cr1220-2 | BT3 |
| 1 | CONN | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J4 |
| 1 | DS1307Z+ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | GPIO | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J1 |
| 1 | JUMPER | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | RLED | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D10 |
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Questions
How big is the Pi zero hat PCB?
It measures 65 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pi zero hat use?
30 parts, built around the DS1307Z+T&R, 1N5819WS, Q13FC1350000400 and CL31A476MPHNNNE. 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 hat KiCad files?
From the Doenec/pi-hat repository on GitHub, at the commit this page was made from: the board is pi zero hat LoRa/pi zero hat.kicad_pcb and its schematic Pi hat LoRa/Pi hat LoRa.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi zero hat 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).