Casio FW-91 replaced with smart internals

The Sensor Watch is a modern upgrade for the classic Casio F-91W and A158W wristwatches, featuring a hackable ARM Cortex M0+ microcontroller. The project has successfully raised over $112,000, significantly exceeding its $10,000 goal, with 2,186 backers. The Sensor Watch replaces the original quartz movement, offering an always-on monochrome display that consumes minimal power, allowing it to run for over a year on a single battery. It includes various watch faces and functionalities, such as timekeeping, world clock, sunrise/sunset times, and moon phases. Users can also customize the firmware to add features like temperature logging, astronomy calculations, and more. The Sensor Watch Lite simplifies the design by integrating a temperature sensor directly onto the board, making it more affordable. The device is open-source, encouraging users to create their own applications and watch faces. The microcontroller supports various peripherals and has a low-power segment LCD, making it suitable for outdoor activities. The Sensor Watch is designed to be water-resistant and is available for purchase at a price point of around $39.

- The Sensor Watch is a hackable upgrade for classic Casio watches, featuring an ARM Cortex M0+ microcontroller.

- It has raised over $112,000, far surpassing its initial funding goal.

- The watch offers various functionalities, including timekeeping, temperature logging, and customizable firmware.

- The Sensor Watch Lite version integrates a temperature sensor for a lower price.

- It is open-source, allowing users to create personalized applications and watch faces.