smart doorbell 3d model

A photorealistic close-up photograph of a physical engineering prototype for a wall-mounted smart HVAC controller. The enclosure is a custom-designed, 3D-printed rectangular box with rounded corners, made from matte white PLA plastic with a subtle FDM printing texture. The overall dimensions are approximately 100mm tall, 65mm wide, and 30mm deep. On the upper front face, there is a prominent, translucent white hemispherical dome lens for the HC-SR501 PIR motion sensor. Directly below the dome, a single, clear 5mm IR LED emitter protrudes slightly from a snug hole, aimed straight forward. The right side surface of the enclosure features a series of three neat, horizontal slotted vents to allow airflow to the internal DHT22 sensor. On the bottom edge, there is a precise cutout for a Micro-USB port with a black cable plugged in, trailing downwards. The device is mounted flat against a textured, light beige painted drywall surface. Studio lighting from the top right highlights the plastic texture, the curve of