HardLabs

Roamer

ezzatisawesome·roamer

Roamer PCB layout, top view — open source Microchip SAM board by ezzatisawesome

About the Roamer PCB

Roamer is an open source Microchip SAM PCB design by ezzatisawesome, published on GitHub. It is a 4-layer board measuring 39 × 99 mm, with 92 components from 33 distinct parts.

Its main chip is the ATSAMD51J19A-A, from the Microchip SAM family. Other key parts include the 2MB Flash, AP2112K-3.3, MCP73831-2-OT, RFM95W-915S2 and AP3602AKTR-G1. By type, the board carries 46 resistors, 19 capacitors, 9 ICs, 6 connectors, 4 diodes and 2 crystals.

It belongs with the rf & radio designs in this gallery.

Main components on the Roamer

ATSAMD51J19A-A2MB FlashAP2112K-3.3MCP73831-2-OTRFM95W-915S2AP3602AKTR-G1BME688INA260RFM96W-433S2

Roamer bill of materials (BOM)

92 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATSAMD51J19A-A
MCU1
1
2MB Flash
U1
1
AP2112K-3.3
U2
1
MCP73831-2-OT
U3
1
RFM95W-915S2
U4
1
AP3602AKTR-G1
U6
1
BME688
U7
1
INA260
U8
1
RFM96W-433S2
U9
1
DMP2070UQ-7
Q3
1
32.768 kHz
X2
1
microUSB 2.0 B
X3
2
Conn_Coaxial_Small
J1, J4
1
JSTPH
J2
2
Conn_02x05_Odd_Even
J3, J5
1
MEM2075-00-140-01-A
J8
1
3V3 Testpoint
+3V3
1
KMR2
SW1
1
ORANGE
CHG1
1
WS2812B3535
D1
Show 13 more
QtyPartRefs
2
1N4148
D2, D3
1
MBR120
D4
1
RED
L1
1
10UH
10uH
L2
9
10UF
10uF
C1, C3, C5, C6, C8, C9, C13, C16 +1
2
22PF
22pF
C2, C4
8
1UF
1uF
C7, C10, C11, C12, C14, C15, C18, C19
15
10K
R1, R3, R4, R5, R6, R8, R20, R23 +7
1
1K
R2
1
2.2K
R7
1
100K
R9
27
0
R10, R11, R12, R13, R14, R15, R16, R17 +19
1
100K
R38

Roamer design files

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

Roamer: common questions

What microcontroller does the Roamer use?

The Roamer is built around the ATSAMD51J19A-A, from the Microchip SAM family.

How big is the Roamer PCB?

The Roamer measures 39 × 99 mm, has 4 copper layers and is 1.64592 mm thick.

How many components are on the Roamer?

92 components, from 33 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 Roamer design files?

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

Can I use the Roamer design in my own project?

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

Can I test firmware for the Roamer without the hardware?

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

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