Door peephole camera – Raspberry Pi Zero 2 W + Camera Module 3 (magnetic)
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Magnetic enclosure that turns a Pi Zero 2 W + Camera Module 3 into a camera looking through your door peephole.
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- Creative Commons — Attribution — Noncommercial — Share Alike
A small magnetic enclosure for a Raspberry Pi Zero 2 W and a Camera Module 3. It sticks on the inside of a steel door, with the lens right behind the peephole: you get a live door camera without drilling or changing the door.
Closed size: about 40 × 78 × 40 mm.
WHAT YOU NEED
- Raspberry Pi Zero 2 W in the common black aluminium heatsink case (two halves with fins, about 65 × 30 × 13.4 mm). The box is sized for this case, not for a bare board.
- Raspberry Pi Camera Module 3 (standard)
- Official Raspberry Pi camera cable "Standard – Mini", 200 mm (it folds inside the box)
- 6 neodymium disc magnets, Ø5 × 3 mm (the plate has 10 pockets: 6 used + 4 spare)
- 4 × M2 screws for the camera: M2×4 with 0–1 washer, M2×6 with 2–3 washers. Do not use M2×8, they go through.
- Optional: 2 × M2×4 side screws to lock the box shut
- superglue for the magnets
- A micro-USB power supply
PRINT SETTINGS
- PLA, 0.4 mm nozzle, 0.16 mm layers
- 4 walls, 15 % infill, no supports, no brim
- Print as oriented in the files: plate flat on its door side, box on its back
- Printed on an Elegoo Neptune 4 Pro with Elegoo Rapid PLA+ (plate about 40 min, box about 1 h 25)
ASSEMBLY
1. Glue the magnets flush with the door side, all facing the same way.
2. Pre-thread the 4 camera holes with a screw, then screw the camera on. With no washer the lens sticks out about 2.5 mm on the door side. Each 1 mm washer pulls it back 1 mm, to match your peephole.
3. Connect the ribbon to the camera and to the Zero.
4. Slide the Zero into the box: ports on the left, microSD at the top, camera connector at the bottom. Fold the ribbon on top.
5. Clip the plate into the box. To open it, press the two teeth through the side windows.
Power goes in through the micro-USB hole on the left side. The status LED shows next to it.
SOFTWARE TIPS
- A peephole flips the image: turn on both horizontal and vertical flip (for example rpiCameraHFlip / rpiCameraVFlip in MediaMTX, or --hflip --vflip with rpicam).
- Crop to the peephole circle (ROI / digital zoom) to use the full sensor resolution.
- If the image is blurry, try moving the box slightly on the door before changing any focus settings.