Place the module into the new steel case. Ensure the zebra strips (conductive rubber) align with the LCD screen. Insert the metal pushers. Screw in the case back. It should be tight.
, the countdown timer is electronically disabled rather than absent. By opening the case and removing a specific solder bridge on the printed circuit board, a user can "unlock" this feature. Once the connection is broken, the watch cycle updates to include a fully functional timer, effectively upgrading the watch's utility without adding any physical bulk. This mod is a rite of passage for many watch enthusiasts, representing a triumph of user ingenuity over corporate feature-segmentation. Beyond internal electronics, the physical appearance of the
You can convert the standard screen into a sleek, stealthy negative display (light text on a dark background).
For those who want to change the watch's personality entirely, there's the LCD color mod. This involves placing extremely thin, colored films or tapes—such as Kapton tape—directly on the LCD glass. By using different colors (amber, blue, pink, red, green) and even layering them, modders can change the natural greyish-green of the LCD to a vibrant amber, a cool blue, or a rich magenta. The effect is a complete transformation, giving the otherwise utilitarian display a retro-futuristic or completely unique look.
The Casio W-800H has quickly become a favorite among watch enthusiasts and MODders, who appreciate its simplicity and versatility. The MODding community has been instrumental in keeping the spirit of the F-91W alive, with enthusiasts creating custom designs, swapping out straps, and even modifying the watch's internals to create one-of-a-kind timepieces. casio w-800h mod
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: Remove the four screws on the backplate. Carefully lift the metal plate, ensuring you don't lose the tiny rubber gasket or the alarm spring.
The standard 18mm resin strap can be replaced using adapters. This allows the watch to be paired with 22mm nylon NATO straps, which are often more comfortable and provide extra security; if one spring bar fails, the watch remains attached to the strap. Place the module into the new steel case
2/10 | Cost: $5 The Hydromod involves filling the inside of the watch case with a clear, non-conductive liquid (usually silicone oil or Fluorinert).
: Dramatically improves underwater legibility and theoretical water resistance.
: On the right side of the board (near the buttons), you will see a column of solder pads. Look for a closed solder jumper (a small blob of solder connecting two pads).
: Use your soldering iron to heat the blob and wick it away. Alternatively, some modders carefully scrape the bridge away with a sharp hobby knife, though this carries a higher risk of damaging the board. Screw in the case back
Replacing the external resin housing with compatible parts from other models.
Open the case, access the PCB, and use a soldering iron or copper wick to remove the solder from Jumper 0 (located in a specific corner of the board).
: Upgrades your watch from a single alarm to five total alarms, including a snooze option. Tools and Materials Needed
Dip a cotton swab in a small amount of acetone or high-strength isopropyl alcohol. The action: Gently rub the printed text off the resin case.
Carefully desolder or "scratch off" the specific jumper to open the circuit. Auto-Repeat Feature
To give your W-800H a stealthy, modern look, you can invert the liquid crystal display (LCD).