HardLabs

IO watch

zyyan20h·PCBRenewal·Examples/IO_watch/IO_watch.kicad_pcb

IO watch PCB layout, top view — open source AVR/Arduino board by zyyan20h

About the IO watch PCB

IO watch is an open source AVR/Arduino PCB design by zyyan20h, published on GitHub. It is a 2-layer board measuring 35 × 34.7 mm, with 34 components from 10 distinct parts.

Its main chip is the ATMEGA328P-AU, from the AVR/Arduino family. Other key parts include the DS3231S. By type, the board carries 15 resistors, 6 LEDs, 6 diodes, 2 ICs, 2 switches and 2 capacitors.

It belongs with the wearables designs in this gallery.

From the project

One other thing you can try is using the Python Scripting Console Click the button with the terminal icon at the top of the screen Type import pcbnew and press enter Type print(pcbnew.FULLBACKTRACE) and press enter The error message should be shown on the screen * Report the erro

One other thing you can try is using the Python Scripting Console Click the button with the terminal icon at the top of the screen Type import pcbnew and press enter Type print(pcbnew.FULLBACKTRACE) and press enter The error message should be shown on the screen * Report the error message to the developer

IO watch, from the project README
From the project README

Main components on the IO watch

ATMEGA328P-AUDS3231S

IO watch bill of materials (BOM)

34 components, 10 distinct parts.

QtyPartRefs
1
ATMEGA328P-AU
U1
1
DS3231S
U2
1
1060TR
BT1
2
EVQ-P7A01P
S1, S2
6
LED
1, 2, 3, 4, 5, 12
6
LED
D6, D7, D8, D9, D10, D11
1
1uF
C1
1
0.1uF
C2
12
R
R1, R2, R3, R4, R5, R6, R7, R8 +4
3
10K
R13, R14, R15

IO watch design files

The KiCad project lives in the zyyan20h/PCBRenewal repository on GitHub; these links point at the commit this page was built from.

IO watch: common questions

What microcontroller does the IO watch use?

The IO watch is built around the ATMEGA328P-AU, from the AVR/Arduino family.

How big is the IO watch PCB?

The IO watch measures 35 × 34.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the IO watch?

34 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the IO watch design files?

From the zyyan20h/PCBRenewal repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the IO watch design in my own project?

The repository has no license, so all rights stay with zyyan20h. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the IO watch 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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