  This paper presents a laboratory activity aimed at developing knowledge and
expertise in microwave applications at cryogenic temperatures. The experience
focuses on the detection of single infrared photons through Microwave Kinetic
Inductance Detectors (MKIDs). The experimental setup, theoretical concepts, and
activities involved are detailed, highlighting the skills and knowledge gained
through the experience. This experiment is designed for postgraduate students
in the field of quantum technologies.
