HardLabs

PiHat

mkramar·dizzyrobot·Schamatic/PiHat/PiHat.kicad_pcb

PiHat PCB layout, top view — open source STM32 board by mkramar

About the PiHat PCB

PiHat is an open source STM32 PCB design by mkramar, published on GitHub. It is a 2-layer board measuring 65 × 29.9 mm, with 65 components from 46 distinct parts.

Its main chip is the STM32F031G4U6, from the STM32 family. Other key parts include the LM2678-3.3V, LM2678-12V, IFX91041 - 3.3V, LSM6DS33 and LTC2876. By type, the board carries 27 connectors, 12 capacitors, 10 resistors, 7 diodes, 6 ICs and 2 inductors.

Main components on the PiHat

LM2678-3.3VLM2678-12VIFX91041 - 3.3VLSM6DS33LTC2876STM32F031G4U6

PiHat bill of materials (BOM)

65 components, 46 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM2678-3.3V
ACS781
U1
1
LM2678-12V
IFX91041 - 5V
U2
1
IFX91041 - 3.3V
U3
1
LSM6DS33
U5
1
LTC2876
U6
1
STM32F031G4U6
U7
1
Resonator_Small
Y1
2
+45V
J1, J2
4
GND
J3, J4, J10, J11
1
3.3V
J5
1
CONN_02X05
5V
J6
1
CONN_02X10
CONN_02X20
J7
2
MOTOR
J8, J9
1
SW1
J12
1
SW2
J13
4
MOUNT
J14, J15, J16, J17
1
CONN_02X05
J18
1
SDA
J19
1
SCL
J20
1
ADCI
J21
Show 26 more
QtyPartRefs
1
ADCV
J22
1
DE
J23
1
TX
J24
1
RX
J25
2
CONN_01X02
J26, J27
1
D
D1
1
D
D2
1
47V
D3
2
D_Small
D4, D5
2
LED_Small
D6, D7
1
15UH
47uH
L1
1
33UH
47uH
L2
4
0.1uF
C2, C9, C10, C11
2
22nF
C3, C4
1
220nF
C5
1
0.1UF
220nF
C6
2
0.01UF
100uF
C7, C8
1
100UF
0.1uF
C12
1
100UF
1uF
C13
2
22k
R1, R2
1
100K 1%
R3
1
10K
4K 1%
R4
1
4K 1%
R5
1
30K
6K 1%
R6
2
10K
R7, R8
2
370
R9, R10

PiHat design files

The KiCad project lives in the mkramar/dizzyrobot repository on GitHub; these links point at the commit this page was built from.

PiHat: common questions

What microcontroller does the PiHat use?

The PiHat is built around the STM32F031G4U6, from the STM32 family.

How big is the PiHat PCB?

The PiHat measures 65 × 29.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PiHat?

65 components, from 46 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 PiHat design files?

From the mkramar/dizzyrobot repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the PiHat design in my own project?

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

Can I test firmware for the PiHat without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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