Step 02: Mount the Pi Bracket onto the Speaker Unit

Align the Pi Bracket with the upper section of the Speaker Unit, ensuring the speaker wires pass cleanly through the central opening. Gently rotate the Pi Bracket into position until it locks into the designed grooves.

Step 03: Mount the Raspberry Pi into the Pi Bracket

Place the Raspberry Pi 4 onto the Pi Bracket, aligning the mounting holes with the standoffs. Secure it using 4 × M2×6 screws.

Step 3.1: Check Pi Bracket

Ensure that the board is oriented so that the USB ports and microSD card slot align with their dedicated openings in the chassis.

Step 04: Mount the AIY Voice Bonnet onto the Raspberry Pi

Align the AIY Voice Bonnet with the GPIO header of the Raspberry Pi 4 and gently press it down until it is fully seated. Make sure all the pins are correctly aligned and inserted straight into the header to prevent bending or loose contact.

Step 05: Mount the RSC Expansion Board onto the AIY Voice Bonnet

Align the RSC Expansion Board with the pin headers on the AIY Voice Bonnet, ensuring all pins match their respective sockets. Gently press the board down until it sits evenly on top of the bonnet. If the board doesn’t hold firmly in place, secure it with 1 × M2×6 screw at the mounting hole provided on the edge of the board. This will keep it stable and prevent loose contact during operation.

Step 06: Connect the Speaker Wires to the Voice Bonnet

Insert the Speaker wires (red and black) into the terminal block on the AIY Voice Bonnet. Ensure the red wire goes into the positive (+) terminal and the black wire into the negative (–) terminal. Use a small screwdriver to gently tighten both screws, securing the wires firmly in place. Make sure there is no loose connection before continuing.

Step 07: Connect the Expansion Board to the AIY Voice Bonnet

Use jumper wires to connect the RSC Expansion Board with the AIY Voice Bonnet as shown below. Ensure that each pin is connected correctly and the wire connections are firm. Match the pins carefully as follows:
3.3V to 3.3V
TX to TXD
RX to TXD
PWM to PWM
Double-check that the orientation and wire colors match on both ends to prevent reversed connections.

Step 08: Mount the Servo Motors and Connect Them to the Expansion Board

Insert both Servo motors into their designated slots on the Main Chassis. Make sure the servo shafts face outward for proper flipper movement. Once positioned, connect each servo cable to the PWM header on the Expansion Board, following the correct pin orientation:
Left Servo to PWM1 to Brown = GND, Red = 5V, Orange = Signal
Right Servo to PWM2 to Brown = GND, Red = 5V, Orange = Signal
P.S. Don't FORGET to attach (with screws) the printed flippers to the servos before moving on

Step 09: Connect and Mount the ESP32-2432S028 Display

1. Connect Display Wires:
   1. Attach one end of the 1x4P connector cable to the VIN, TX, RX, and GND pins of the ESP32-2432S028 Display.
   2. Ensure firm connections to avoid loose contact during operation.
2. Mount the Display into Its Case:
   1. Place the ESP32 Display module into the Front Panel Display Case, aligning the screen with the front opening.
   2. Press gently until the board sits flush within the case.
3. Fit the case gently into the chassis.

Step 10: Connect to Expansion Board

Connect the other ends of the wires from the ESP32-2432S028 Display Pin to the RSC Expansion Board as follows:

• VIN to 5V
• TX to TX
• RX to RX
• GND to GND

Step 11: Assemble the Head Unit (Button + NeoPixel Ring + Lid)

1. Prepare Components:
   1. Gather the Lid (top cover), Arcade Button (with LED wires), Button Holder Ring, and NeoPixel Ring.
2. Insert the Button:
   1. Pass the Arcade Button wires through the central hole of the Lid from the top side.
   2. Insert the button firmly into the hole until the threaded section is fully visible underneath.
3. Mount the NeoPixel Ring:
   1. Pass the button wires through the center of the NeoPixel Ring and position the ring around the base of the button on the inner side of the Lid.
   2. Align the ring with the small square supports inside the Lid; these ensure proper centering and stability.
4. Secure the Assembly:
   1. Screw the white Button Holder Ring onto the base of the Arcade Button to lock the entire head unit (button + NeoPixel Ring) securely in place.

Step 12: Connect the NeoPixel Ring and Arcade Button

1. Connect the NeoPixel Ring:
   1. Attach the NeoPixel Ring wires to the RSC Expansion Board.
   2. Ensure the Signal (DIN) wire connects to the NeoPixel header pin on the Expansion Board.
   3. The 5V and GND wires should connect to their respective power pins.
2. Connect the Arcade Button:
   1. Plug the Arcade Button connector into the Button header on the AIY Voice Bonnet.

Step 13: Install the Power Switch and Rear Panel

1. Mount the Switch:
   1. Insert the Power Switch into the rectangular slot on the Rear Panel from the back side. Push it in until it clicks into place; the fit is snug by design.
2. Attach the Rear Panel:
   1. Carefully slide the Rear Panel into the Chassis, ensuring the switch wires pass neatly inside without being pinched.
3. Connect the Power Wires:
   1. Plug the Power Switch wires into the Switch header on the RSC Expansion Board.

Step 14: Attach the Lid and Complete the Assembly

1. Position the Lid:
   1. Carefully lower the Lid assembly (with the Arcade Button and NeoPixel Ring already installed) onto the top of the Chassis.
   2. Ensure all internal wires are neatly tucked in to avoid being pinched.
2. Secure the Fit:
   1. Gently press the Lid down until it snaps into place. The v4.1 design uses a precision friction-fit connection that holds the Lid securely without screws.
3. Final Check:
   1. Confirm that:
      1. The Arcade Button moves freely when pressed.
      2. The Power Switch on the back panel toggles easily.
      3. All seams are properly aligned for a clean finish.