A few years ago Joey Castillo introduced Sensor Watch, a $35 board designed to fit inside the shell of a Casio F-91W wristwatch, giving a classic watch some modern hardware including an ARM Cortex-M0+ ...
The Ollee Watch features an ARM Cortex-M4/M0+ low-power processor with support for Bluetooth Low Energy and a programmable NTAG213 NFC tag (although this is said to only be compatible with the F-91W ...
The DIY version of the Ollee Watch one, which requires you to already have one of six different supported Casio watch models ...
Well, of the three you mention, I’ve never been too fond of Casio watches such as the Triple Sensor ($199; www.casio.com), one of their altimeter models. I find them overly laden with gimmicks, ...
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