PIR, Passive Infared Detector. Human body has a constant temperature and emits infrared at certain wave length. PIR senses the human body by monitoring this particular infrared ray. The technology is simple and practical, and undisturbed by temperature and light. So that it is widely used in automatic switches.
Combining with other modules, PIR Sensor Card can apply the interactive mode of human body sensing into various creative ideas. For example, when pedestrians approach, the sad face on the display screen turns into a smiling one, or when people approach, atmosphere music of the space rings.
PIR Sensor Card allows you to sense the motion of any object in its range. The sensor integrates an ADC converter (Analog-to-Digital Converter) and outputs HIGH, when anyone moves in its detecting range. It features S16-L221D 6-pin SMD pyroelectric infrared sensor which measures only 3.6×3.6mm.
Longan Cards is a unique open source development platform designed by Longan Labs. As a plug and play development platform, Longan Cards allows you to quicky build wide array of prototypes and applications in no time. A full set of Arduino libraries and plenty of example codes are available to play with Longan Cards platform.