HardLabs

EyeWatch

evgenu·EyeWatch·Hardware/SmartWatch/SmartWatch.kicad_pcb

EyeWatch PCB layout, top view — open source AVR/Arduino board by evgenu

About the EyeWatch PCB

EyeWatch is an open source AVR/Arduino PCB design by evgenu, published on GitHub. It is a 6-layer board measuring 38.1 × 38.1 mm, with 76 components from 39 distinct parts.

Its main chip is the ATmega328P-MMH, from the AVR/Arduino family. Other key parts include the 6PAIC3109TWRHMRQ1, SPG08P4HM4H-1, MC3630, BQ29700DSER and W25Q128JVSIQ. By type, the board carries 32 capacitors, 18 resistors, 8 ICs, 4 connectors, 3 crystals and 3 switches.

It belongs with the wearables designs in this gallery.

Main components on the EyeWatch

6PAIC3109TWRHMRQ1SPG08P4HM4H-1MC3630BQ29700DSERATmega328P-MMHW25Q128JVSIQMAX30100EFD+TDA14683-00000A92

EyeWatch bill of materials (BOM)

76 components, 39 distinct parts.

QtyPartRefs
1
6PAIC3109TWRHMRQ1
IC1
1
SPG08P4HM4H-1
IC2
1
MC3630
IC3
1
BQ29700DSER
U1
1
ATmega328P-MMH
U2
1
W25Q128JVSIQ
U3
1
MAX30100EFD+T
U4
1
DA14683-00000A92
U5
1
c0720b001f
M1
2
ECH8693R-TL-W
Q1, Q2
2
16Mhz
Y1, Y2
1
32.768Mhz
Y3
1
Charging Port
J1
1
DA_PROG_CONN
J2
1
ARD_PROG_CONN
J3
1
Adafruit 4520
J4
1
RJD2430C1ST1
BT1
1
SMS-1508MS-HT-R
LS1
1
UP
SW1
1
CHOOSE
SW2
Show 19 more
QtyPartRefs
1
DOWN
SW3
1
ESD9B5.0ST5G
D1
2
470nH
L1, L2
5
100nF
C1, C3, C6, C7, C18
3
10nF
C2, C19, C20
2
22pF
C4, C5
4
4.7uF
C8, C12, C13, C16
3
1uF
C9, C10, C11
8
10uF
C14, C15, C17, C23, C25, C28, C29, C30
2
C
C21, C22
5
0.1uF
C24, C26, C27, C31, C32
2
5.1M
R1, R2
2
330
R3, R7
1
0.39
R4
1
2.2K
R5
6
10K
R6, R8, R12, R13, R14, R15
2
4.7K
R9, R10
1
100m
R11
3
3.3K
R16, R17, R18

EyeWatch design files

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

EyeWatch: common questions

What microcontroller does the EyeWatch use?

The EyeWatch is built around the ATmega328P-MMH, from the AVR/Arduino family.

How big is the EyeWatch PCB?

The EyeWatch measures 38.1 × 38.1 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the EyeWatch?

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

Where can I download the EyeWatch design files?

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

Can I use the EyeWatch design in my own project?

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

Can I test firmware for the EyeWatch without the hardware?

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

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