HardLabs

Pi hat

race-on·pi-hat

Pi hat layout, top view — open source board by race-on

About the Pi hat

Pi hat is an open source PCB design by race-on, published on GitHub. It is a 2-layer board measuring 65 × 56.5 mm, with 70 components from 29 distinct parts.

Other key parts include the SPX29302T5-L, NCP5901B, BD48K60G, LMR14030SDDAR and MPU-9250. By type, the board carries 18 resistors, 16 capacitors, 12 ICs, 5 transistors, 4 connectors and 4 LEDs.

It belongs with the dev boards & breakouts, power & battery and sensors designs in this gallery.

From the project

PCB design on KiCad for Raspberry Pi shield

A Raspberry Pi HAT to control a self-driving car. HAT includes: 1. 3.5A DC-DC converter to power the Pi from a battery (2-3 LiPo cells) 2. 10A H-bridge for DC motor control 3. 3A LDO to power servo at 6V for faster response time 4. Battery alarm when the voltage drops under 6V 5. I2C accelerometer interface 6. Interface for encoders based on the QRE1113 analog line sensor 7. Compatible with Jetson Nano 8. Reverse polarity protection 9. Optimized for Seeed Studio PCBA

Pi hat, from the project README
From the project README

Main components on the Pi hat

SPX29302T5-LNCP5901BBD48K60GLMR14030SDDARMPU-9250SN74LVC2G07DBVRCAT24C256WI-GT3SPX3819M5-L-1-8

Pi hat bill of materials (BOM)

70 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SPX29302T5-L
MIC29302WU
IC1
2
NCP5901B
IC2, IC3
1
BD48K60G
IC4
1
LMR14030SDDAR
LMR14030
IC5
1
MPU-9250
IC6
4
SN74LVC2G07DBVR
SN74LVC2G07
IC7, IC8, IC9, IC10
1
CAT24C256WI-GT3
CAT24C256
U1
1
SPX3819M5-L-1-8
U5
1
A2543WV-3P
SERVO
M1
4
IRLR8726TRLPBF
IPD50R380CE
Q1, Q2, Q4, Q5
1
IRF9310TRPBF
SQJA37EP1
Q3
2
1935161
Screw_Terminal_01x02
J1, J4
1
A2541WV-2X3P
Conn_02x03_Odd_Even
J2
1
PF1-M220-SBB-G0
Pi Connector
J3
1
Fiducial
FID1
4
MountingHole
H1, H2, H3, H4
1
AI1027TWT5V2R
LS1
1
ORH-R35A
RED
LED1
3
ORH-YG35A
GREEN
LED2, LED3, LED4
2
PMEG4010EH,115
D
D1, D3
Show 9 more
QtyPartRefs
1
MBRS540T3G
D_Schottky
D2
1
WPN4020H2R2MT
2.2uH
L1
5
CL21B104KCFNNNE
100nF
C1, C6, C7, C9, C12
5
CL31A475KOHNNNE
4.7uF
C2, C3, C4, C10, C13
6
GRM32ER61C476KE15L
47uF
C5, C8, C11, C14, C15, C16
1
0805W8F4642T5E
46.4k
R1
13
0805W8J0392T5E
3.9k
R2, R3, R5, R6, R7, R12, R13, R14 +5
3
0805W8F1212T5E
12.1k
R4, R9, R10
1
0805W8F6492T5E
64.9k
R8

Pi hat design files

The KiCad project lives in the race-on/pi-hat repository on GitHub; these links point at the commit this page was built from.

Pi hat: common questions

How big is the Pi hat?

The Pi hat measures 65 × 56.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pi hat?

70 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Pi hat design files?

From the race-on/pi-hat repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Pi hat design in my own project?

The repository has no license, so all rights stay with race-on. Use it as a reference, and ask the author before reusing the design.

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