2025 One Hertz Challenge: Digital Clock Built With Analog Timer - You can use a microcontroller to build a clock. After all, a clock is just somethi... - https://hackaday.com/2025/08/13/2025-one-hertz-challenge-digital-clock-built-with-analog-timer/ #clockhacks #arduinouno #555timer #clock

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

Clock of Clocks Expands, Goes Digital - Some people just want to have their cake and eat it too, but very few of us ever g... - https://hackaday.com/2025/08/08/clock-of-clocks-expands-goes-digital/ #clockhacks #lightpipe #metaclock #neopixel #acrylic #stepper #clock #pmma #cnc #rgb

A Repeater for WWVB - For those living in the continental US who, for whatever reason, don’t have access... - https://hackaday.com/2025/08/07/a-repeater-for-wwvb/ #clockhacks #wristwatch #amplifier #arduino #clock #radio #watch #wwvb #pwm

2025 One Hertz Challenge: The Easy Way to Make a Nixie Tube Clock - Let’s say you want to build a Nixie clock. You could go out and find some tubes, s... - https://hackaday.com/2025/08/07/2025-one-hertz-challenge-the-easy-way-to-make-a-nixie-tube-clock/ #2025hackadayonehertzchallenge #frequencycounter #clockhacks #nixietube #contests #clock #nixie

2025 One Hertz Challenge: An Animated Ferrofluid Display - Ferrofluid is fun. You’ve probably seen all kinds of demos with it bouncing around... - https://hackaday.com/2025/08/06/2025-one-hertz-challenge-an-animated-ferrofluid-display/ #2025hackadayonehertzchallenge #clockhacks

Flex PCB Underlies the Watch of the Future - If you were at OpenSauce, you may have seen new Youtuber [Sahko] waltzing about wi... - https://hackaday.com/2025/08/05/flex-pcb-underlies-the-watch-of-the-future/ #digitalwristwatch #clockhacks #ledmatrix #ledwatch #stm32 #watch

2025 One Hertz Challenge: Analog Clock for Microsoft Windows - Our hacker [glgorman] sent in their submission for the One Hertz Challenge: an ana... - https://hackaday.com/2025/08/04/2025-one-hertz-challenge-analog-clock-for-microsoft-windows/ #microsoftwindows #softwarehacks #analogclock #clockhacks

2025 One-Hertz Challenge: The Flip Disc Clock - Do you like buses, or do you just like the flippy-flappy displays they use to show... - https://hackaday.com/2025/08/01/2025-one-hertz-challenge-the-flip-disc-clock/ #kitchenstoragetub #flipdotdisplay #clockhacks #clock

2025 One Hertz Challenge: Op-Amp Madness - Sometimes, there are too many choices in this world. My benchtop function generato... - https://hackaday.com/2025/07/31/2025-one-hertz-challenge-op-amp-madness/ #2025hackadayonehertzchallenge #clockhacks #oscillator #hardware #sinewave #analog #op-amp

2025 One Hertz Challenge: Precise Time Ref via 1 Pulse-Per-Second GPS Signal - Our hacker [Wil Carver] has sent in his submission for the One Hertz Challenge: Pr... - https://hackaday.com/2025/07/29/2025-one-hertz-challenge-precise-time-ref-via-1-pulse-per-second-gps-signal/ #voltage-controlledcrystaloscillator #ovencontrolledcrystaloscillator #gpsdisciplinedoscillator #clockhacks #ocxo #vcxo #gps

2025 One-Hertz Challenge: Fixing The Clock That Once Synced The World - The HP 115BR is not one of the most well-known products from Hewlett-Packard. And ... - https://hackaday.com/2025/07/29/2025-one-hertz-challenge-fixing-the-clock-that-once-synced-the-world/ #2025hackadayonehertzchallenge #hewlettpackard #clockhacks #clock

2025 One Hertz Challenge: Drop the Beat (But Only at 60 BPM) - Mankind has been using water to mark the passage of time for thousands of years. F... - https://hackaday.com/2025/07/28/2025-one-hertz-challenge-drop-the-beat-but-only-at-60-bpm/ #raspberrypipico #clockhacks #contests #rp2040 #water #drip

2025 One-Hertz Challenge: Clock Calibrator - Wall clocks! Are they very accurate? Well, sometimes they are, and sometimes they ... - https://hackaday.com/2025/07/28/2025-one-hertz-challenge-clock-calibrator/ #2025hackadayonehertzchallenge #clockcalibration #calibration #clockhacks #contests #timing #clock

2025 One-Hertz Challenge: Shadow Clock - You can buy all kinds of conventional clocks that have hands and numbers for easy ... - https://hackaday.com/2025/07/26/2025-one-hertz-challenge-shadow-clock/ #2025hackadayonehertzchallenge #clockhacks #clock #time

2025 One-Hertz Challenge: A Clock Sans Silicon - Just about every electronic device has some silicon semiconductors inside these da... - https://hackaday.com/2025/07/26/2025-one-hertz-challenge-a-clock-sans-silicon/ #2025hackadayonehertzchallenge #clockhacks #contests #dekatron #clock #tubes

2025 One Hertz Challenge: A Discrete Component Divider Chain - Most of us know that a quartz clock uses a higher frequency crystal oscillator and... - https://hackaday.com/2025/07/25/2025-one-hertz-challenge-a-discrete-component-divider-chain/ #2025onehertzcontest #clockdivider #clockhacks #32.768khz #contests

2025 One-Hertz Challenge: Pokémon Alarm Clock Tells You It’s Time to Build the Very Best - We’ve all felt the frustration of cheap consumer electronics — especially when the... - https://hackaday.com/2025/07/22/2025-one-hertz-challenge-pokemon-alarm-clock-tells-you-its-time-to-build-the-very-best/ #2025hackadayonehertzchallenge #microcontroller #clockhacks #contests #pokemon #games #clock #esp32 #art

2025 One-Hertz Challenge: It’s Hexadecimal Unix Time - [danjovic] came up with a nifty entry for our 2025 One-Hertz Challenge that lands ... - https://hackaday.com/2025/07/21/2025-one-hertz-challenge-its-hexadecimal-unix-time/ #2025onehertzcontest #clockhacks #unixtime #clock

Time, Stars, and Tides, All On Your Wrist - When asked ‘what makes you tick?’ the engineers at Vacheron Constantin sure know w... - https://hackaday.com/2025/07/18/time-stars-and-tides-all-on-your-wrist/ #wearablehacks #chronograph #clockhacks #horology #skychart #watch