Infrared alarm based on single-chip microcomputer

The utility model discloses an infrared alarm based on a single-chip microcomputer, comprising a single-chip microcomputer system, a power circuit module, a clock circuit module, a reset circuit module, a pyroelectric infrared detection module, a sound-light alarm module, and a GSM alarm module. The alarm uses the single-chip microcomputer as a core of an operating processor, and a pyroelectric infrared sensor is externally connected. An infrared probe disposed on a monitoring point converts detected human body radiated infrared spectrum to electric signals, and the signals are finally input into the single-chip microcomputer through an amplification circuit. Through software query, recognition, and determination, and other steps, the alarm gives out intruder alarm state control signals in real time, so as to drive a sound-light alarm circuit and the GSM module to give out alarm. The design is advantaged by low cost and good detection effect, and has wide market prospect.