A motion detector circuit can detect a moving person from a distance of 1 meter. It uses a dual IR sensor. When the sensor detects the reflected IR rays, alarm will sound for 2 minutes.

TSOP17XX Vishay Semiconductor \nIR EMITTING DIODE; Leaded Process Compatible: Yes\n None None https://www.snapeda.com/parts/TSOP1738/Vishay/view-part/?ref=snap TSOP1738 In Stock https://www.snapeda.com/parts/TSOP1738/Vishay/view-part/?ref=eda

555 Type, Timer/Oscillator (Single) IC 500kHz 8-DIP #Commonpartlibrary #IntegratedCircuit #Timer #Oscillator

A buck boost converter that can be powered from a Li-Ion battery and output 3.3V @ 500mA. Powered by the TPS63051YFFR and in the same package as a standard Adafruit buck converter. Expect to squeeze around 5-10% SoC from a typical Li-Ion battery. Input Voltage Range: 2.5V to 5.5V Assembled at pcbway.com