HardLabs

MWatch

mincrmatt12·MWatch·board/bigboard/bigboard.kicad_pcb

MWatch PCB layout, top view — open source RP2040/RP2350 board by mincrmatt12

About the MWatch PCB

MWatch is an open source RP2040/RP2350 PCB design by mincrmatt12, published on GitHub. It is a 4-layer board measuring 89.9 × 88.8 mm, with 105 components from 39 distinct parts.

Its main chip is the SC0914(7), from the RP2040/RP2350 family. Other key parts include the MAX20353AEWN+, D52MD2M8IA-TRAY, SN74LVC8T245PWR, GD25LQ128DSIGR and BMM150. By type, the board carries 43 capacitors, 16 resistors, 11 ICs, 11 connectors, 8 switches and 8 diodes.

It belongs with the wearables designs in this gallery.

From the project

pebble-style smartwatch os&hardware

Main components on the MWatch

MAX20353AEWN+D52MD2M8IA-TRAYSC0914(7)SN74LVC8T245PWRGD25LQ128DSIGRBMM150BMI270APDS-9306-065TXB0104DPCF85263AT/AJ

MWatch bill of materials (BOM)

105 components, 39 distinct parts.

QtyPartRefs
1
MAX20353AEWN+
U1
1
D52MD2M8IA-TRAY
D52MxxM8
U2
1
SC0914(7)
RP2040
U3
2
SN74LVC8T245PWR
U4, U5
1
GD25LQ128DSIGR
U6
1
BMM150
U7
1
BMI270
U8
1
APDS-9306-065
U9
1
TXB0104D
U10
1
PCF85263AT/AJ
U11
1
Motor_AC
M1
1
445C25D12M00000
12MHz
Y1
1
SC32S-7PF20PPM
32.768kHz
Y2
1
U262-161N-4BVC11
USB_C_Receptacle_USB2.0
J1
5
Conn_01x03_Male
J2, J3, J4, J5, J10
1
503566-2102
Conn_2Rows-21Pins_MountingPin
J6
1
Conn_01x05_Male
J7
1
Conn_02x03_Row_Letter_First
J8
1
Conn_01x02_Male
J9
1
Conn_02x07_Row_Letter_First
J11
Show 19 more
QtyPartRefs
1
Antenna_Loop
AE1
1
B3B-PH-K-S(LF)(SN)
Battery_Cell
BT1
8
B3F-1020
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8
1
SP0502BAHTG
D1
4
CUS10S30,H3F
D
D2, D3, D7, D8
3
BZ-C0603-C2-E1
LED
D4, D5, D6
1
MLP2012V4R7MT0S1
4.7uH
L1
2
DFE201210U-2R2M=P2
2.2uH
L2, L3
1
CC0603KRX5R7BB105
1uF
C1
26
CC0201KRX5R8BB104
100nF
C2, C4, C6, C7, C8, C11, C16, C19 +18
7
CC0201MRX5R6BB105
1uF
C3, C5, C12, C21, C30, C31, C37
5
GRM188R61E106KA73D
10uF
C9, C10, C13, C14, C15
2
CC0201JRNPO9BN270
27pF
C17, C18
2
GRM0335C1H121JA01J
120pF
C40, C41
9
RC0201FR-0710KL
10k
R1, R2, R3, R11, R12, R13, R14, R15 +1
2
RC0201FR-075K1L
5.1k
R4, R5
1
RC0201FR-074K02L
4.02k
R6
2
RC0201FR-071KL
1k
R7, R8
2
RC0201FR-0727RL
27
R9, R10

MWatch design files

The KiCad project lives in the mincrmatt12/MWatch repository on GitHub; these links point at the commit this page was built from.

MWatch: common questions

What microcontroller does the MWatch use?

The MWatch is built around the SC0914(7), from the RP2040/RP2350 family.

How big is the MWatch PCB?

The MWatch measures 89.9 × 88.8 mm, has 4 copper layers and is 1 mm thick.

How many components are on the MWatch?

105 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the MWatch design files?

From the mincrmatt12/MWatch repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the MWatch design in my own project?

The repository has no license, so all rights stay with mincrmatt12. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the MWatch without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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