NeoBell Main Module

The Main Visitor Interaction Unit serves as the primary external interface and the operational core of the NeoBell system, orchestrating all interactions with visitors and delivery personnel. Its front panel, as depicted in the schematic, is designed for clear user engagement and houses the critical sensors and feedback mechanisms. Housed within a durable enclosure, this unit functions as an automated receptionist.

The module is constructed from a carefully crafted wooden enclosure, a material choice that can offer a balance of aesthetics and workability for a prototype. This enclosure has been specifically engineered to accommodate several essential components:

• External Camera: Positioned towards the top of the unit, the camera module is the system's primary visual sensor. The front panel features a precisely dimensioned opening of 8 cm x 3,5 cm tailored for the camera's field of view. This ensures optimal visual capture – for visitor faces (facial recognition, video messages) and package labels (delivery verification) – without obstruction.
• Speaker Grille & Internal Microphone: Below the camera area, a larger aperture measuring 10 cm x 10 cm is strategically positioned. This opening serves a dual purpose:
  • It acts as the speaker grille, allowing clear audio transmission from the internal speaker for delivering prompts and system feedback.
  • Behind this, a sensitive microphone is housed, with the opening's dimensions and placement calculated to maximize audio capture efficiency from visitors.
• Activation Button: Situated on the front panel (as shown towards the bottom right in the schematic), the circular activation button is the primary means for users to initiate interaction. This button maintains dual connectivity, interfacing simultaneously with both the Radxa board (SBC) and a custom-designed PCB, highlighting the integrated electronic management within the unit.

The overall external dimensions of this Main Visitor Interaction Unit have been precisely calculated to be 15 cm (Width) x 20 cm (Height) x 12,9 cm (Depth). These proportions provide adequate internal space for all integrated functionalities while maintaining a compact and practical form factor suitable for an entryway. When a visitor presses the activation button, the Radxa board and custom PCB work in concert to manage the camera, microphone, and speaker, efficiently coordinating the system's response based on the processed visitor intent.

Staging Box (Outside)

The Delivery Compartment (Staging Box) is a critical component of the NeoBell system, engineered to serve as the initial, secure point of contact for package deposits. Its design balances user-friendliness for delivery personnel with the internal mechanisms required for automated verification.

The external appearance of the Staging Box, as depicted in its initial schematic, is a rectangular enclosure with dimensions of 40.0 cm (Width) x 40.0 cm (Depth) x 30.0 cm (Height). This size provides a versatile internal volume for common package sizes. The front panel features:

• A clearly defined access door for package insertion.
• A prominent vertical handle, offering an intuitive way for delivery personnel to open the door once the system has electronically unlocked it.
• Two LED indicators towards the top: a Green Light to signal positive status (e.g., compartment unlocked, ready for deposit, or delivery verified) and a Red Light to indicate a warning or negative status (e.g., compartment locked, delivery not authorized, or system error). These universally understood colors aim to minimize confusion.

The overall simple rectangular form is chosen for ease of initial construction and integration of internal components.

Staging Box (Inside)

To understand the internal workings that enable its secure function, a further schematic reveals the layout once the access door is opened. This internal configuration is key to the package verification process:

• The access door is shown connected via Hinges to the main compartment body.