it’s possible to pick up your pulse, too. Getting this data out of the sensor is remarkably easy. One need only hook it up to a suitable microcontroller like the ESP8266 and use the MAX3010X ...

Measuring the usage of domestic utilities such as water, gas or electricity usually boils down to measuring a repetitive pulse ... the ESP8266 polls the ATtiny13 to pull the stored sensor pulses ...

In this work, we report a pulse oximeter sensor based on organic materials, which are compatible with flexible substrates. Green (532 nm) and red (626 nm) organic light-emitting diodes (OLEDs ...