{"title":"Mini Basic PIR Sensor - BS412","handle":"mini-basic-pir-sensor-bs412","url":"/products/mini-basic-pir-sensor-bs412","description":"A compact passive infrared (PIR) motion sensor that detects movement from approximately 3–8 metres away. Much smaller than standard PIR modules, making it ideal for unobtrusive, space-constrained projects. Fully self-contained — just needs power, ground, and a resistor to set the delay time.\n\nKey Features\n\n\n3.3 V Operation – Low-voltage, low-power motion detection\n\n~5 m Detection Range – Effective from approximately 3–8 m with the snap-on lens\n\n120° Detection Spread – Wide field of view\n\nAdjustable On-Time – From 2 seconds (0 V on pin 2) up to 1 hour (3.3 V) via resistor divider\n\n4 × 3 mm Sensor Window – Compact BS-series sensing element\n\nBreadboard Friendly – Standard pin spacing for easy prototyping\n\n\nWiring\n\nPin 1 → Ground\nPin 2 → Ground (for 2-second on-time) or resistor divider (see datasheet for values)\nPin 3 → 3.3 V\nPin 4 → Signal output (3.3 V high/low)\n\n\n\nNote: This sensor runs on 3.3 V. If interfacing with a 5 V microcontroller such as Arduino, power the sensor from the 3.3 V regulator, not the 5 V rail.\n\n\nResources\n\n\nPIR Sensor Tutorial (CircuitPython and Arduino code examples)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3858,"title":"Default Title","sku":"AF-4666","price":3.8,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}