#ds3231 — Public Fediverse posts

DS3231 RTC looks simple until you actually sync it.

The chip itself is — ±2ppm, I2C, done.
The hard part is getting accurate time INTO it.

Source is NTP over WiFi. But between the request
and the write to RTC registers you have:

— network latency (variable)
— AES-256-GCM decrypt of the response
— JSON parse

By the time you write the timestamp,
it's already 50-200ms stale. At ±2ppm accuracy
that's noise larger than the chip's drift..

[AI Translated] 🤖

#ESP32 #RTC #Embedded #DS3231

Building a 7-Segment Shadow Clock https://hackaday.com/2025/08/10/building-a-7-segment-shadow-clock/ #realtimeclock #clockhacks #DS3231 #clock #ESP32

Building a 7-Segment Shadow Clock - There are plenty of conventional timepieces out there in the world; we’ve also fea... - https://hackaday.com/2025/08/10/building-a-7-segment-shadow-clock/ #realtimeclock #clockhacks #ds3231 #clock #esp32

Настольные деревянные часы

Цифровых настольных деревянных часов как-то мало в продаже, в основном имитация пластика под дерево. Нет, не нужен WiFi и Bluetooth, радио и радужный дисплей, будильник и метеостанция. Просто часы, точно показывающие время. Так началась история разработки миниатюрных цифровых часов в деревянном корпусе. Нацелившись на результат, но больше ради процесса, был спроектирован описанный далее прибор для точного измерения времени.

https://habr.com/ru/articles/922790/

#Электронные_часы #DS3231 #diyпроекты

Having fun with some RTCs and my Arduino Pro Mini.

As a spin-off from my NeoPixel Clock project, I am gathering data to measure the drift between the Arduino internal clock, a DS1307 RTC and a few DS3231RTCs.

Anyway, wanted a DS3231SN based RTC. So I ordered a couple...

* DS3231SN in the product title ✔️
* DS3231SN in the product description ✔️
* DS3231M delivered today ❌

Not happy 😠

#Arduino
#DS1307
#DS3231

Разработка больших цифровых часов на светодиодной ленте

Когда-то давно в детстве, когда я ещё только начинал заниматься электроникой, у меня была мечта изготовить огромные часы на семисегментных индикаторах. Для их изготовления я рассматривал люминесцентные лампы дневного света. По прошествии многих лет в обиход вошли светодиодные ленты. Именно они и послужили стимулом воплотить свою старую задумку в реальность. Имея возможность и опыт программирования микроконтроллеров, я решил, конечно же, самостоятельно изготовить электронную плату для часов со своими функциональными возможностями. В данной статье я не буду подробно описывать принципиальную схему и прошивку МК. Напишу лишь краткий обзор и историю разработки своей конструкции.

https://habr.com/ru/articles/844440/

#atmega8 #atmega32 #часы #светодиодная_лента #pwm #шим #tcp/ip #rs232 #ds3231 #bmp280

Clock Mixes Analog, Digital, Retrograde Displays https://hackaday.com/2024/05/30/clock-mixes-analog-digital-retrograde-displays/ #clockhacks #retrograde #3dprinted #voltmeter #lasercut #arduino #digital #display #analog #binary #DS3231 #clock

Clock Mixes Analog, Digital, Retrograde Displays - Unique clocks are a mainstay around here, and while plenty are “human readable” wi... - https://hackaday.com/2024/05/30/clock-mixes-analog-digital-retrograde-displays/ #clockhacks #retrograde #3dprinted #voltmeter #lasercut #arduino #digital #display #analog #binary #ds3231 #clock

Customizable Bird Clock Sings The Hours By - For those looking to build their own clocks, one of the easiest ways to get starte... - https://hackaday.com/2024/05/16/customizable-bird-clock-sings-the-hours-by/ #steppermotor #clockhacks #atmega128a #birdsong #ds3231 #clock #bird #mp3 #rtc

Customizable Bird Clock Sings The Hours By https://hackaday.com/2024/05/16/customizable-bird-clock-sings-the-hours-by/ #steppermotor #clockhacks #atmega128a #birdsong #DS3231 #clock #bird #mp3 #rtc

ESP8266 data logger: temperature and humidity measurements, SD card storage and remote access with REST API

https://www.techrm.com/esp8266-data-logger-temperature-and-humidity-measurements-sd-card-storage-and-remote-access-with-rest-api/

#breadboard, #datalogger, #DHT22, #DS3231, #Dupontcables, #esp8266, #internetofthings, #iot, #library, #platformio, #realtimeclock, #RTC, #SDcard, #SDcardmodule, #SDcardreader, #sensor, #sensors, #tutorial

ESP8266 data logger: temperature and humidity measurements, SD card storage and remote access with REST API

https://www.techrm.com/esp8266-data-logger-temperature-and-humidity-measurements-sd-card-storage-and-remote-access-with-rest-api/

#breadboard, #datalogger, #DHT22, #DS3231, #Dupontcables, #esp8266, #internetofthings, #iot, #library, #platformio, #realtimeclock, #RTC, #SDcard, #SDcardmodule, #SDcardreader, #sensor, #sensors, #tutorial

Blackout Logger Keeps Track of Power Outages - [Dmytro Panin] lives in Kyiv, Ukraine where there have been rolling blackouts to s... - https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/ #raspberrypipico #raspberrypi #datalogger #ds3231rtc #ds3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages - [Dmytro Panin] lives in Kyiv, Ukraine where there have been rolling blackouts to s... - https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/ #raspberrypipico #raspberrypi #datalogger #ds3231rtc #ds3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages - [Dmytro Panin] lives in Kyiv, Ukraine where there have been rolling blackouts to s... - https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/ #raspberrypipico #raspberrypi #datalogger #ds3231rtc #ds3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages - [Dmytro Panin] lives in Kyiv, Ukraine where there have been rolling blackouts to s... - https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/ #raspberrypipico #raspberrypi #datalogger #ds3231rtc #ds3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages - [Dmytro Panin] lives in Kyiv, Ukraine where there have been rolling blackouts to s... - https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/ #raspberrypipico #raspberrypi #datalogger #ds3231rtc #ds3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages

https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/

#RaspberryPiPico #RaspberryPi #datalogger #DS3231RTC #DS3231 #eink #rtc

Blackout Logger Keeps Track of Power Outages

https://hackaday.com/2022/11/26/blackout-logger-keeps-track-of-power-outages/

#RaspberryPiPico #RaspberryPi #datalogger #DS3231RTC #DS3231 #eink #rtc

TshWatch Helps You Learn More About Yourself - TshWatch is a project by [Ivan / @pikot] that he’s been working on for the past tw... - https://hackaday.com/2022/04/03/tshwatch-helps-you-learn-more-about-yourself/ #wearableelectronics #wearablehacks #healthhacking #healthmonitor #e-inkdisplay #datalogging #datalogging #datalogger #datalogger #smartwatch #ds3231rtc #wearables #esp32ulp #max30101 #wearable #bme680 #ds3231 #e-ink #esp32 #eink #ulp

Careful Cuts Lets Logger Last a Year On A Coin Cell - Coin cells are great for backup power for things like real-time clocks, or even fo... - https://hackaday.com/2022/03/14/careful-cuts-lets-logger-last-a-year-on-a-coin-cell/ #microcontrollers #microcontroller #datalogger #efficiency #coincell #battery #ds3231 #energy #clock #power #rtc

Be Mesmerized By The Latest Time Twister - [Hans Andersson] has been creating marvelous twisting timepieces for over a decade... - https://hackaday.com/2021/12/18/be-mesmerized-by-the-latest-time-twister/ #arduinohacks #clockhacks #mechanical #ds3231 #clock #rtc

Unique Clock Doubles as a Development Board - Most clocks these days have ditched the round face and instead prefer to tell time... - https://hackaday.com/2021/09/18/unique-clock-doubles-as-a-development-board/ #clockhacks #328patmega #ds3231 #ws2812 #ch340 #clock #time #pcb

Watch Your Life Tick Away with This Lifetime Countdown Clock - Good news, everyone! Now you can have an ongoing existential crisis, every second of your ever-dwi... more: https://hackaday.com/2020/02/06/watch-your-life-tick-away-with-this-lifetime-countdown-clock/ #clockhacks #countdown #doomsday #ds3231 #teensy #clock #rtc

Arduino Wristwatch Has LED Hands - When you read “Arduino wristwatch”, you fall into the trap of envisioning an Arduino UNO clumsily ... more: https://hackaday.com/2020/01/05/arduino-wristwatch-has-led-hands/ #arduinohacks #clockhacks #arduino #ds3231 #watch

Rise and Shine with this Japanese-Inspired Clock - On the Hackaday.io page for his gorgeous “Sunrise Alarm Clock”, [The Big One] is quick to point out ... more: https://hackaday.com/2019/11/03/rise-and-shine-with-this-japanese-inspired-clock/ #woodworking #clockhacks #ledmatrix #mp3player #ledhacks #max2719 #max7219 #ds3231 #clock