11 open source boards using the DS3231
Real designs built with the DS3231, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
AVR/ArduinoLargeWordClock
LikeClockwork
398.2 × 398.2 mm579 parts2LMIT6
4IN14NixieShield
NEONTEC75
98.8 × 53.6 mm43 parts2LCC-BY-NC-4.02
AVR/ArduinoZ80Card
galjonsfigur
85.6 × 54 mm77 parts2LGPL-3.01
6IN14NixieShield
143.9 × 53.6 mm48 parts2LCC-BY-NC-4.01
AVR/ArduinoNixie Clock
haXoru5
140 × 60 mm34 parts2LNo license1
AVR/ArduinoSpineTime Controller Board
DaringCuteSeal
52 × 29 mm40 parts2LNo license3
ESP32Spectre-Sniffer
jayis1
80 × 320 mm23 parts4LNo license3
STM32KbxBinaryClock.v2.1.backup
kbx81
127 × 114.3 mm123 parts2LNo license2
STM32KbxBinaryClock.v3.backup
127 × 114.3 mm123 parts2LNo license2
TheHub
djmallek
118.8 × 184.2 mm42 parts2LNo license1
Raspberry PiPiCanBoard
ieb
106.7 × 61.6 mm45 parts2LNo license1
The DS3231 in open source designs
The gallery holds 11 open source boards using the DS3231 from 10 GitHub repositories; a typical one measures about 118.8 × 61.6 mm and carries around 45 components.
91% are two-layer designs, the rest use four layers or more, and 18% carry an open source license.
The most starred is LargeWordClock by LikeClockwork.
Microcontrollers on boards using the DS3231
What boards using the DS3231 are built for
DS3231: common questions
Where can I find a DS3231 reference design?
Each of the 11 boards on this page is a real design using the DS3231. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the DS3231 use?
Most are built on AVR/Arduino (4), STM32 (2), ESP32 (1) and Raspberry Pi (1).
How big is a typical board using the DS3231?
The median is 118.8 × 61.6 mm, and 91% are two-layer designs.
What is the most popular open source board using the DS3231?
By GitHub stars, LargeWordClock by LikeClockwork, with 6 stars.
Can I simulate one of these boards using the DS3231 before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.