Casio W-800h Mod -

With a simple hardware modification, you can transform this $20 timepiece into a high-functioning tool watch. This guide covers everything you need to know about the Casio W-800H mod. Why Mod the Casio W-800H?

Screw the metal case back on using a cross-pattern to ensure equal pressure.

There are several benefits to modding a Casio W-800H. For one, it allows watch enthusiasts to create a truly unique and one-of-a-kind timepiece that reflects their individual style and personality. Additionally, modding a W-800H can also be a cost-effective way to breathe new life into an old or worn-out watch, rather than purchasing a brand-new one.

is often chosen for its rugged, lightweight feel, some enthusiasts transfer the module into other, more stylized cases to create a custom look.

Casio W-800H is a favorite among modders because its internal hardware (Module 3240) shares a common PCB with higher-end models, meaning several advanced features are pre-built but factory-disabled. 1. Unlock Hidden Features (Hardware Mod) casio w-800h mod

“Watch modding,” he said, not looking up. “It’s a thing.”

The Casio W-800H is a legendary budget digital watch. It features 100 meters of water resistance, a 10-year battery life, and a highly readable dual-time display. However, Casio intentionally locked several advanced features in the watch's software.

Flip the module over to check the screen. Press the Mode button (bottom left) to cycle through the menu. You should now see new screens: Timekeeping Countdown Timer (TR) Stopwatch (ST) Dual Time (DT)

If you are planning to modify your watch, let me know how it goes. I can help you troubleshoot if you run into any issues during the process. Please tell me: With a simple hardware modification, you can transform

Before you ever open a case back or reach for a screwdriver, it's important to know that your W-800H is likely capable of more than Casio lets on. The stock watch ships with useful features like dual time modes, multiple alarms, and a stopwatch. However, Casio often uses a single PCB across a variety of models to save on manufacturing costs. This means that inside your watch, there is a series of solder jumpers that can enable or disable certain functions, essentially "telling" the PCB what model it is.

Most mods start with the case. Because the W-800H has a screw-down case back (unlike the F-91W’s friction fit) and 100M water resistance, you can actually take a modded watch swimming. The CR2025 battery lasts a decade, meaning you aren't opening the case every year.

Gently unclip the thin metal framework holding the LCD screen and circuit board to the white plastic housing. Modifying the Circuit Board

He pressed the light button. The green glow washed over the kitchen. Still works. Screw the metal case back on using a

The most significant "internal" mods involve manipulating the solder jumpers on the watch's PCB to enable features Casio disabled for market segmentation.

: Gently lift the plastic module out of the case. Be careful not to press the side buttons while doing this.

Some W-800H models come with a "negative display" (light background, dark digits), but they are harder to find. Modders often seek out these specific modules (like those found in the W-800H-1AV) to swap into their custom metal cases for a stealthier, " Predator" look.

This mod involves opening the watch, disassembling the module, and modifying the circuit board. Tools Needed Small Phillips screwdriver (for the back plate) Fine-tipped tweezers Soldering iron (fine tip) and/or solder wick

The W-800H’s crystal is recessed, making it prone to smudges and glare. The fix? Fill the case with (low viscosity, like 5cSt or 10cSt). This eliminates internal reflections, makes the LCD “pop” as if painted on the glass, and increases water resistance dramatically (theoretically past 200m). The downside? The buttons become stiff, and it’s messy if you fail.