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JdeBP<p>You have 5 bits for the hour of the day in a clock chip register. Do you just use a binary representation from 0x2x0_0001 to 0x2x1_0111?</p><p>No. That would be too easy. Programmers might use your hardware, and that would never do.</p><p>So you make bit 4 mean add ten to the value in the lower four bits, and document hour 23 as being hour 13+10.</p><p>And for kicks you do that for the 5 bit month number register, too. Because 4 bits storing just 0x2x0001 to 0x2x1100 would just let those pesky programmers in, again.</p><p>What on Earth were these chip designers on? BCD, I could understand. Even giving midnight the value 8 I could understand. But this scheme is just mad.</p><p><a href="https://files.seeedstudio.com/wiki/Pi_RTC-DS1307/res/DS1307.pdf" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">files.seeedstudio.com/wiki/Pi_</span><span class="invisible">RTC-DS1307/res/DS1307.pdf</span></a></p><p><a href="https://mastodonapp.uk/tags/HardwareDesign" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HardwareDesign</span></a> <a href="https://mastodonapp.uk/tags/RealTimeClock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RealTimeClock</span></a> <a href="https://mastodonapp.uk/tags/DallasSemiconductor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DallasSemiconductor</span></a></p>
SetSideB<p>White Pointer Gaming on Pokemon Gold/Silver’s Real Time Clock &amp; GB Mappers<br>White Pointer Gaming is another excellent source of retro game hardware information, and a few days ago they uploaded a dive into the specifics of the real time clock used in Pokemon Generation 2 (14 minutes), and as an encore discussed Gameboy mapper chips<br><a href="https://setsideb.com/white-pointer-gaming/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">setsideb.com/white-pointer-gam</span><span class="invisible">ing/</span></a><br><a href="https://wrestling.social/tags/hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hardware</span></a> <a href="https://wrestling.social/tags/retro" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retro</span></a> <a href="https://wrestling.social/tags/gameboy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gameboy</span></a> <a href="https://wrestling.social/tags/Gen2" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Gen2</span></a> <a href="https://wrestling.social/tags/hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hardware</span></a> <a href="https://wrestling.social/tags/MBC3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MBC3</span></a> <a href="https://wrestling.social/tags/pokemon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>pokemon</span></a> <a href="https://wrestling.social/tags/RealTimeClock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RealTimeClock</span></a> <a href="https://wrestling.social/tags/retro" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>retro</span></a> <a href="https://wrestling.social/tags/video" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>video</span></a> <a href="https://wrestling.social/tags/WhitePointerGaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WhitePointerGaming</span></a> <a href="https://wrestling.social/tags/youtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>youtube</span></a></p>
adingbatponder<p>How does one make a computer, a <a href="https://fosstodon.org/tags/raspberrypi5" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>raspberrypi5</span></a> , that has <a href="https://fosstodon.org/tags/rtc" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>rtc</span></a> <a href="https://fosstodon.org/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a> battery, but that is *not* connected to the internet, adjust its time to summer and winter time i.e. make the 1 hour clock change at 3 am on the relevant days? Or does Raspberry Pi OS do this automatically if the date is right?</p>
Now with 16k<p>New Blog Enrty: With a slight delay, the ZX81 can read and set time using the RTC. Time flies when you're having fun, but the ZX81 might need a little extra time to catch up! <a href="https://mastodon.social/tags/ZX81" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ZX81</span></a> <a href="https://mastodon.social/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RetroComputing</span></a> <a href="https://mastodon.social/tags/RealTimeClock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RealTimeClock</span></a> <a href="https://mastodon.social/tags/VintageTech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VintageTech</span></a> </p><p><a href="https://www.zx81keyboardadventure.com/2024/11/dallas-time-on-zx81.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">zx81keyboardadventure.com/2024</span><span class="invisible">/11/dallas-time-on-zx81.html</span></a></p>
Pyrzout :vm:<p>Educational Arduino Clock Uses Analog Meters For Display <a href="https://hackaday.com/2024/03/01/educational-arduino-clock-uses-analog-meters-for-display/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/03/01/educat</span><span class="invisible">ional-arduino-clock-uses-analog-meters-for-display/</span></a> <a href="https://social.skynetcloud.site/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a> <a href="https://social.skynetcloud.site/tags/clockhacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clockhacks</span></a> <a href="https://social.skynetcloud.site/tags/arduino" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>arduino</span></a> <a href="https://social.skynetcloud.site/tags/clock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clock</span></a></p>
Techrm<p>Data logger ESP8266: misurazioni di temperatura e umidità, archiviazione su SD card e accesso remoto con API REST</p><p><a href="https://www.techrm.com/it/data-logger-esp8266-misurazioni-di-temperatura-e-umidita-archiviazione-su-sd-card-e-accesso-remoto-con-api-rest/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">techrm.com/it/data-logger-esp8</span><span class="invisible">266-misurazioni-di-temperatura-e-umidita-archiviazione-su-sd-card-e-accesso-remoto-con-api-rest/</span></a></p><p><a href="https://mastodon.uno/tags/breadboard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>breadboard</span></a>, <a href="https://mastodon.uno/tags/caviDupont" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>caviDupont</span></a>, <a href="https://mastodon.uno/tags/datalogger" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>datalogger</span></a>, <a href="https://mastodon.uno/tags/DHT22" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DHT22</span></a>, <a href="https://mastodon.uno/tags/digitale" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>digitale</span></a>, <a href="https://mastodon.uno/tags/DS3231" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DS3231</span></a>, <a href="https://mastodon.uno/tags/elettronicadigitale" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>elettronicadigitale</span></a>, <a href="https://mastodon.uno/tags/esp8266" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>esp8266</span></a>, <a href="https://mastodon.uno/tags/internetdellecose" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>internetdellecose</span></a>, <a href="https://mastodon.uno/tags/iot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iot</span></a>, <a href="https://mastodon.uno/tags/lettoreSDcard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lettoreSDcard</span></a>, <a href="https://mastodon.uno/tags/libreria" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>libreria</span></a>, <a href="https://mastodon.uno/tags/moduloSDcard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>moduloSDcard</span></a>, <a href="https://mastodon.uno/tags/NodeMCU" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NodeMCU</span></a>, <a href="https://mastodon.uno/tags/platformio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platformio</span></a>, <a href="https://mastodon.uno/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a>, <a href="https://mastodon.uno/tags/RTC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RTC</span></a>, <a href="https://mastodon.uno/tags/SDcard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDcard</span></a>, <a href="https://mastodon.uno/tags/sensore" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sensore</span></a>, <a href="https://mastodon.uno/tags/sensori" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sensori</span></a>, <a href="https://mastodon.uno/tags/tutorial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tutorial</span></a></p>
Techrm<p>ESP8266 data logger: temperature and humidity measurements, SD card storage and remote access with REST API</p><p><a href="https://www.techrm.com/esp8266-data-logger-temperature-and-humidity-measurements-sd-card-storage-and-remote-access-with-rest-api/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">techrm.com/esp8266-data-logger</span><span class="invisible">-temperature-and-humidity-measurements-sd-card-storage-and-remote-access-with-rest-api/</span></a></p><p><a href="https://mastodon.uno/tags/breadboard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>breadboard</span></a>, <a href="https://mastodon.uno/tags/datalogger" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>datalogger</span></a>, <a href="https://mastodon.uno/tags/DHT22" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DHT22</span></a>, <a href="https://mastodon.uno/tags/DS3231" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DS3231</span></a>, <a href="https://mastodon.uno/tags/Dupontcables" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Dupontcables</span></a>, <a href="https://mastodon.uno/tags/esp8266" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>esp8266</span></a>, <a href="https://mastodon.uno/tags/internetofthings" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>internetofthings</span></a>, <a href="https://mastodon.uno/tags/iot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iot</span></a>, <a href="https://mastodon.uno/tags/library" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>library</span></a>, <a href="https://mastodon.uno/tags/platformio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>platformio</span></a>, <a href="https://mastodon.uno/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a>, <a href="https://mastodon.uno/tags/RTC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RTC</span></a>, <a href="https://mastodon.uno/tags/SDcard" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDcard</span></a>, <a href="https://mastodon.uno/tags/SDcardmodule" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDcardmodule</span></a>, <a href="https://mastodon.uno/tags/SDcardreader" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SDcardreader</span></a>, <a href="https://mastodon.uno/tags/sensor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sensor</span></a>, <a href="https://mastodon.uno/tags/sensors" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sensors</span></a>, <a href="https://mastodon.uno/tags/tutorial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tutorial</span></a></p>
The VintNerd<p>Found this odd RTC cartridge for Atari ST. Will have to check the battery, and find software out there. 🤔</p><p><a href="https://mastodon.online/tags/Atari" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Atari</span></a> <a href="https://mastodon.online/tags/AtariST" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtariST</span></a> <a href="https://mastodon.online/tags/16Bit" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>16Bit</span></a> <a href="https://mastodon.online/tags/RTC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RTC</span></a> <a href="https://mastodon.online/tags/RealTimeClock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RealTimeClock</span></a> <a href="https://mastodon.online/tags/RTCTS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RTCTS</span></a> <a href="https://mastodon.online/tags/VintageComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VintageComputing</span></a> <a href="https://mastodon.online/tags/RetroComputers" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RetroComputers</span></a> <a href="https://mastodon.online/tags/RetroGaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RetroGaming</span></a> <a href="https://mastodon.online/tags/WallOfRetro" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WallOfRetro</span></a> <a href="https://mastodon.online/tags/NerdsOfVintage" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NerdsOfVintage</span></a> <a href="https://mastodon.online/tags/HappyNerding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HappyNerding</span></a> <a href="https://mastodon.online/tags/TheVintNerd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TheVintNerd</span></a></p>
nickharrison<p>Clock man - Maarten Baas Real Time Clock<br><a href="https://mastodonapp.uk/tags/dutch" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>dutch</span></a> <a href="https://mastodonapp.uk/tags/artist" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>artist</span></a> <br>🕓<br>50 Eastbourne Terrace <a href="https://mastodonapp.uk/tags/paddington" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>paddington</span></a> <br><a href="https://mastodonapp.uk/tags/clockman" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clockman</span></a> <a href="https://mastodonapp.uk/tags/maartinbaas" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>maartinbaas</span></a> <a href="https://mastodonapp.uk/tags/maartinbassrealtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>maartinbassrealtimeclock</span></a> <a href="https://mastodonapp.uk/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a> <a href="https://mastodonapp.uk/tags/clock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clock</span></a> <a href="https://mastodonapp.uk/tags/art" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>art</span></a> <a href="https://mastodonapp.uk/tags/time" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>time</span></a> <a href="https://mastodonapp.uk/tags/clockface" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clockface</span></a> <a href="https://mastodonapp.uk/tags/artwork" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>artwork</span></a> <a href="https://mastodonapp.uk/tags/clockhands" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>clockhands</span></a> <a href="https://mastodonapp.uk/tags/act" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>act</span></a> <a href="https://mastodonapp.uk/tags/create" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>create</span></a> <a href="https://mastodonapp.uk/tags/paddingtonstation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>paddingtonstation</span></a> <a href="https://mastodonapp.uk/tags/iphonephotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iphonephotography</span></a> <a href="https://mastodonapp.uk/tags/MinuteHand" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MinuteHand</span></a> <a href="https://mastodonapp.uk/tags/ClockHand" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ClockHand</span></a></p>
Larry (Mr.Optimization)<p>I just requested that my bb_rtc library (my 22nd) be added to the Arduino Library Manager:</p><p><a href="https://github.com/bitbank2/bb_rtc" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="">github.com/bitbank2/bb_rtc</span><span class="invisible"></span></a></p><p><a href="https://floss.social/tags/Arduino" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Arduino</span></a> <br><a href="https://floss.social/tags/realtimeclock" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>realtimeclock</span></a></p>