Electrical engineers have developed a temperature sensor that runs on only 113 picowatts ... "Our vision is to make wearable devices that are so unobtrusive, so invisible that users are virtually ...

But as an added twist, the oscillator is keyed by an ATtiny13 hooked to an LM335 temperature sensor, sending out the ... filter to get rid of harmonics and make it legal in the ham bands.

The temperature sensor is integrated into a small chip measuring 0.15 × 0.15 square millimeters in area. (Image: David Baillot/UC San Diego Jacobs School of Engineering) "Our vision is to make ...