HardLabs

SAM32

maholli·SAM32·hardware/SAM32_v22/SAM32.kicad_pcb

SAM32 PCB layout, top view — open source ESP32 board by maholli

About the SAM32 PCB

SAM32 is an open source ESP32 PCB design by maholli, published on GitHub. It is a board measuring 53.4 × 23.4 mm, with 50 components from 29 distinct parts.

Its main chip is the ESP32_WROOM32_SKINNY, from the ESP32 family. Other key parts include the ATSAMD51J20A-AU, MCP73831T-2ACI/OT and AP2112K-3.3TRG1. By type, the board carries 17 resistors, 15 capacitors, 6 connectors, 4 ICs, 2 LEDs and 2 diodes.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

Feather-sized SAMD51 with M4 core serving as UART bridge to WROOM ESP32

SAM32, from the project README
From the project README

Main components on the SAM32

ATSAMD51J20A-AUESP32_WROOM32_SKINNYMCP73831T-2ACI/OTAP2112K-3.3TRG1

SAM32 bill of materials (BOM)

50 components, 29 distinct parts.

QtyPartRefs
1
ATSAMD51J20A-AU
U2
1
ESP32_WROOM32_SKINNY
U3
1
MCP73831T-2ACI/OT
U4
1
AP2112K-3.3TRG1
U5
1
DMG341
Q3
1
ST3215SB
X1
1
10118194-0001LF
J1
1
Conn_01x14
J2
1
5031821852
J3
1
B2B-PH-SM4-TB
J4
1
NPTC072KFMS-RC
J5
1
Conn_01x17
J7
1
KMR231NG LFS
SW1
1
ORANGE LED
CHRG1
1
GREEN LED
GRN1
1
MBR120
D1
1
WS2812B
D2
1
10uH
L1
6
1uF
C1, C3, C5, C9, C10, C11
5
10uF
C2, C4, C6, C7, C12
Show 9 more
QtyPartRefs
1
4.5 nF
C8
2
22pF
C13, C14
1
0.1uF
C15
9
10K
R1, R4, R6, R9, R10, R11, R12, R13 +1
1
2.2K
R2
2
100K
R3, R5
1
1K
R7
1
1M
R8
3
0
R15, R16, R17

SAM32 design files

The KiCad project lives in the maholli/SAM32 repository on GitHub; these links point at the commit this page was built from.

SAM32: common questions

What microcontroller does the SAM32 use?

The SAM32 is built around the ESP32_WROOM32_SKINNY, from the ESP32 family.

How big is the SAM32 PCB?

The SAM32 measures 53.4 × 23.4 mm and is 1.6 mm thick.

How many components are on the SAM32?

50 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the SAM32 design files?

From the maholli/SAM32 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the SAM32 design in my own project?

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

Can I test firmware for the SAM32 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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