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ClockFOUR

wyolum·ClockFOUR·KiCad_bak/ClockFOUR.kicad_pcb

ClockFOUR PCB layout, top view — open source AVR/Arduino board by wyolum
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About the ClockFOUR PCB

ClockFOUR is an open source AVR/Arduino PCB design by wyolum, published on GitHub under the MIT license. It is a 2-layer board measuring 210 × 228 mm, with 431 components from 33 distinct parts.

Its main chip is the ATMEGA328P, from the AVR/Arduino family. Other key parts include the DS3231N. By type, the board carries 197 capacitors, 182 LEDs, 16 resistors, 13 switches, 9 connectors and 2 ICs.

It belongs with the power & battery designs in this gallery.

From the project

RGB word clock based on ClockTHREEjr on TiM hardware

ClockFOUR is a word clock that tells time with words. It has a 14x13 matrix of letters that, when illuminated, tells time to the minute. e.g. �SEVENTEEN MINUTES PAST FOUR� The clock is 28 x 28 x ~2.6 cm. The main PCB is approximately 24 x 22 cm and has 182 RGB WS2812B pixels on the front. The back of the PCB contains an Arduino compatible 328P microprocessor and a DS3231 real time clock chip with 2032 battery backup. Power is provided by a quality international multi-voltage 5V 3A power supply with barrel connector.

Main components on the ClockFOUR

ATMEGA328PDS3231N

ClockFOUR bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA328P
U1
1
DS3231N
U2
2
CONN_1
A6, A7
1
16MHz
X1
1
ICSP
P1
1
FTDI
P2
2
PWR_IN
P3, P5
1
5VEN_L
P6
1
I2C_L
P7
1
5VEN_R
P8
1
I2C_R
P9
1
Marquee
P10
1
CONN_1
B2
1
Batt_RTC
BT1
1
miniSMDC200F/16
F1
4
LDR
LDR1, LDR2, LDR3, LDR4
4
CONN_1
S1, S2, S3, S4
2
CONN_1
S5, S6
4
CONN_1
S10, S11, S12, S13
1
SW_RST
SW1
Show 13 more
QtyPartRefs
1
SW_L
SW2
1
SW_R
SW3
182
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +174
1
SMBJ5339B
D1
1
CONN_1
D7
9
100n
C1, C3, C6, C8, C9, C11, C197, C198 +1
2
22p
C5, C7
4
47u
C10, C194, C195, C196
182
100n
C12, C13, C14, C15, C16, C17, C18, C19 +174
2
470R
R1, R4
10
10K
R2, R3, R5, R6, R7, R10, R11, R14 +2
2
4K7
R8, R9
2
0R
R12, R13

ClockFOUR design files

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

ClockFOUR: common questions

What microcontroller does the ClockFOUR use?

The ClockFOUR is built around the ATMEGA328P, from the AVR/Arduino family.

How big is the ClockFOUR PCB?

The ClockFOUR measures 210 × 228 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ClockFOUR?

431 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 ClockFOUR design files?

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

Can I use the ClockFOUR design in my own project?

Yes, under the terms of its MIT license, which wyolum chose for the repository.

Can I test firmware for the ClockFOUR 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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