14 Apr '17, 7pm

Thinking about wearables for the #HackadayPrize? @Digikey has some great guides & diagrams of designs:

One or more specialized sensors measure the biological information. The parameter of interest is usually analog in nature; as we’ve seen, many devices measure multiple items. An analog front end (AFE) captures and processes the sensor information. The AFE typically contains a front-end signal conditioning circuit such as an op-amp, transimpedance amplifier (TIA ), or programmable gain amplifier (PGA); the output from the front-end device feeds a precision analog-to-digital converter (ADC ). A low-power microcontroller controls and coordinates the operation of the other components. Low-power modes let the microcontroller maximize battery life by spending most of its time in sleep mode and waking periodically to take measurements or respond to incoming data. The microcontroller also includes security features to guard against unauthorized access to patient or user data. The ...

Full article: https://www.digikey.com/en/articles/techzone/2017/apr/red...

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