For those not willing to tear apart the watch case, the strap swap is the easiest entry point.
: Once the bridge is removed, the "Timer" mode becomes accessible in the mode rotation. : Some users report this mod also unlocks an auto-repeat function for the timer, toggled via the light button. 2. Unlocking 5 Multi-Alarms
Place the module back into the case. Ensure the buttons align with the internal metal springs. Replace the rubber gasket properly to maintain water resistance, then screw the case back on. 🎨 Aesthetic Modifications
The W-800H case features printed text like "10 YEAR BATTERY" and "WR 100M". casio w-800h mod
Opening the factory-sealed case immediately voids any manufacturer warranty and frequently compromises the 100m water resistance rating unless specialized pressure-testing equipment is used during reassembly.
Once you have mastered the internal circuit modification, you can customize the exterior look and daily usability of your W-800H. 1. The Negative Display Mod
If you are looking to explore watch customization further, there are many non-invasive aesthetic modifications to consider, such as: For those not willing to tear apart the
🛠️ The Module Mod: Unlocking the Countdown Timer and Alarms
uses module 3240, which shares a PCB with models that include more features. By removing a specific solder jumper on the circuit board, you can enable a 24-hour countdown timer. : Open the case back and remove the module.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Replace the rubber gasket properly to maintain water
The W-800H utilizes Module 3223. Many hobbyists have discovered that while the watch is sold with basic functions, the internal chip is capable of more.
is frequently customized to improve legibility and aesthetics. A popular visual modification involves the "negative display" conversion. By carefully removing the factory polarizing film from the LCD and replacing it with a new sheet rotated at a ninety-degree angle, the screen flips from black-on-grey to a sleek white-on-black look. While this can slightly decrease legibility in low light, it grants the watch a tactical, modern appearance. Others choose to add "hydromods," which involve filling the watch case with high-grade silicone oil. This technique eliminates internal reflections, makes the screen readable from extreme angles, and theoretically increases the watch's pressure resistance. Finally, the external hardware of the
The Casio W-800H is a legendary budget digital watch. It is famous for its 10-year battery, 100-meter water resistance, and bold, readable display. However, Casio intentionally locked some of its best features at the factory.
Use a soldering iron and copper wick to desolder and remove the lead bridge. Short the "AC" contact to the battery to reset the module.