RFID sensor is powered by dirty diapers - The Verge
12:31am PST - February 14th, 2020 technology - The VergeMIT researchers have developed an RFID tag that can be embedded in the hydrogel typically found in disposable diapers. When wet, the hydrogel expands and becomes conductive enough to trigger the tag to send a signal to an RFID reader within a radius of one me…