HardLabs

Wordclock

maelgui·wordclock·pcb/WordclockPCB.kicad_pcb

Wordclock PCB layout, top view — open source AVR/Arduino board by maelgui

About the Wordclock PCB

Wordclock is an open source AVR/Arduino PCB design by maelgui, published on GitHub. It is a 2-layer board measuring 221 × 221 mm, with 153 components from 27 distinct parts.

Its main chip is the ATmega328P-AU, from the AVR/Arduino family. Other key parts include the HC-05, CAP1203, DHT22, MIC5891 and CH340E. By type, the board carries 102 diodes, 20 resistors, 13 capacitors, 10 ICs, 3 connectors and 3 switches.

From the project

This repository contains every files needed to build the clock

This repository contains every files needed to build the clock

- PCB - Vinyle cutout layout - 3D model for diffuser

Firmware for the clock and android app for managing it can be found here :

- https://github.com/maelgui/wordclock-firmware - https://github.com/maelgui/wordclock-manager

Wordclock, from the project README
From the project README

Main components on the Wordclock

HC-05CAP1203DHT22MIC5891CH340EDS3231MATmega328P-AUTPIC6B595

Wordclock bill of materials (BOM)

153 components, 27 distinct parts.

QtyPartRefs
1
HC-05
U1
1
CAP1203
U2
1
DHT22
U3
2
MIC5891
U4, U6
1
CH340E
U5
1
DS3231M
U7
1
ATmega328P-AU
U8
2
TPIC6B595
U9, U10
1
16MHz
Y1
1
USB_B_Micro
J1
1
AVR-ISP-6
J2
1
Conn_01x03
J3
1
CR1220
BT1
1
SW_SPDT
SW1
1
SW_Push
SW2
1
SW_DPDT_x2
SW3
100
LED
D1, D2, D3, D4, D5, D6, D7, D8 +92
2
LED
D101, D102
11
0.1uF
C1, C4, C5, C6, C7, C8, C9, C10 +3
2
22pF
C2, C3
Show 7 more
QtyPartRefs
10
75
R1, R2, R3, R4, R5, R6, R7, R8 +2
1
1K
R11
4
10k
R12, R13, R15, R20
1
2k
R14
1
4,7K
R16
2
2k2
R17, R18
1
1M
R19

Wordclock design files

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

Wordclock: common questions

What microcontroller does the Wordclock use?

The Wordclock is built around the ATmega328P-AU, from the AVR/Arduino family.

How big is the Wordclock PCB?

The Wordclock measures 221 × 221 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wordclock?

153 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Wordclock design files?

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

Can I use the Wordclock design in my own project?

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

Can I test firmware for the Wordclock 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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