HardLabs

ClockIOT

wyolum·ClockIOT·kicad/ClockIOT.kicad_pcb

ClockIOT PCB layout, top view — open source ESP32 board by wyolum

About the ClockIOT PCB

ClockIOT is an open source ESP32 PCB design by wyolum, published on GitHub under the MIT license. It is a 2-layer board measuring 162.6 × 194.3 mm, with 282 components from 54 distinct parts.

Its main chip is the ESP-wroom-32, from the ESP32 family. Other key parts include the APA102, DS3231N, 1117-33 and CP2102N-A01-GQFN28. By type, the board carries 132 ICs, 31 capacitors, 23 connectors, 23 resistors, 6 switches and 3 test points.

From the project

Word Clock

/kicad will be the latest HW version. Earlier versions get sequentially numbered v0, v1 etc.

Main components on the ClockIOT

APA102ESP-wroom-32DS3231N1117-33CP2102N-A01-GQFN28

ClockIOT bill of materials (BOM)

282 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
128
APA102
U1, U2, U3, U4, U5, U6, U7, U8 +120
1
ESP-wroom-32
U129
1
DS3231N
U130
1
1117-33
U131
1
CP2102N-A01-GQFN28
U132
1
DDC114TU
Q1
2
CLK_IN
J1, J9
2
DAT_IN
J2, J10
2
5V
J7, J15
2
GND
J8, J16
1
MISO
J17
1
3V3
J18
1
SCK
J19
1
SPI
J20
1
MOSI
J21
1
RST
J22
1
GND
J23
2
qwiic
J24, J25
1
USB_micro
P1
1
OUT_CLK
P2
Show 34 more
QtyPartRefs
1
USB-C_breakout
P3
1
IN_DAT
P4
1
IN_CLK
P5
1
OUT_DAT
P6
7
Mouse_Bite
BITE1, BITE2, BITE3, BITE4, BITE5, BITE6, BITE7
1
Batt_RTC
BT1
44
hole_baffle
HB1, HB2, HB3, HB4, HB5, HB6, HB7, HB8 +36
4
mtg_hole_3mm
HB51, HB52, HB53, HB54
1
LED_PWR_EN
JP1
2
LDR
LDR1, LDR2
1
SW-ENTER
S1
1
SW-INC
S2
1
SW-EN
S3
1
SW-BOOT
S4
1
SW-DEC
S5
1
SW-MODE
S6
1
~RST
TP1
1
SQR
TP2
1
32kHz
TP3
1
PRTR5V0U2X
D1
1
LED_PWR
D2
2
330E
L1, L2
22
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +14
3
10uF/25V
C17, C23, C25
1
22uF/25V
C18
3
1nF
C19, C20, C21
1
100uF/6V3
C27
1
1uF/10V
C28
5
470R
R1, R2, R16, R18, R22
10
10k
R3, R6, R7, R10, R11, R12, R13, R14 +2
2
1k
R4, R5
2
4K7
R8, R9
2
0R NC
R19, R20
2
0R
R21, R23

ClockIOT design files

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

ClockIOT: common questions

What microcontroller does the ClockIOT use?

The ClockIOT is built around the ESP-wroom-32, from the ESP32 family.

How big is the ClockIOT PCB?

The ClockIOT measures 162.6 × 194.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ClockIOT?

282 components, from 54 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 ClockIOT design files?

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

Can I use the ClockIOT 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 ClockIOT without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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