--- title: "A Custom PCB For The Casio G-Shock" url: https://daily.dev/posts/a-custom-pcb-for-the-casio-g-shock-xytjxug6u source_url: https://hackaday.com/2026/06/23/a-custom-pcb-for-the-casio-g-shock type: article source: "Hackaday" published: 2026-06-23T17:19:40.857Z updated: 2026-06-23T17:44:38.859Z tags: ["hardware", "embedded"] reading_time: 2 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # A Custom PCB For The Casio G-Shock **[Hackaday](https://daily.dev/sources/hackaday)** · 2 min read · 0 upvotes · 0 comments ## Summary Hardware hacker David Volovskiy has created a custom drop-in replacement PCB for the iconic Casio G-Shock wristwatch, paired with open source firmware that dramatically expands the watch's capabilities. The upgraded watch gains a pedometer, games like Blackjack and Wordle, moon phase display, sunrise/sunset calculation, and thermometer readings. A web-based emulator and LCD visualization tool are available for those who want to explore the firmware without hardware. The project builds on Joey Castillo's Sensor Watch, a similar replacement PCB for the Casio F-91W, and interested builders can join a Discord server to get on the list for a production run. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [A DIY watch with off-the-shelf Raspberry Pi RP2040 round display, 3D printed case, and custom firmware](https://daily.dev/posts/a-diy-watch-with-off-the-shelf-raspberry-pi-rp2040-round-display-3d-printed-case-and-custom-firmwa-b4c9kbn22) · CNX Software · 0 upvotes · 0 comments - [Time Frog Color Is A Game Boy Color On Your Wrist](https://daily.dev/posts/time-frog-color-is-a-game-boy-color-on-your-wrist-wvkbojr8a) · Hackaday · 0 upvotes · 0 comments - [Someone built their own e-ink watch, and it features over 20 custom faces](https://daily.dev/posts/someone-built-their-own-e-ink-watch-and-it-features-over-20-custom-faces-8qt7tbytq) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#hardware](https://daily.dev/tags/hardware), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/a-custom-pcb-for-the-casio-g-shock-xytjxug6u)