Thanks to an IR proximity sensor, [romain] can interrupt the cycle and get the date, time, temperature, or even a smiley animation depending on the number of hand passes over the sensor.

Huawei’s temperature-taking smartphone is the most 2020 phone of 2020 An IR temperature sensor lets a smartphone do fever screening for COVID-19.

There may be an actual hardware reason why Siri will never come to older Apple hardware. The iPhone 4S, iFixit discovered, has an IR sensor to let Siri know that you have held it up to your face ...