No-Soldering Upgrade for Your Casio F-91W: Sensor Watch Pro

Oddly Specific Objects is back with a solderless upgrade for the classic Casio F-91W: the Sensor Watch Pro. This upgrade features an accelerometer and a custom LCD, allowing for more complex display options. A browser-based emulator simplifies firmware flashing. The upgrade process is straightforward, involving disassembly and component replacement. The author customized the firmware, removing imperial units and the 12-hour clock, and adding a counter, accelerometer, and light sensor displays.