BMO in Adventure time, powered by raspberry pi 3 and google assistant

thingiverse

3D printed BMO for Raspberry pi 2, raspberry pi 3 BMO is a highly attractive character based on Adventure Time: The Animation from Cartoon Network. I previously created a game console powered by Retropie (https://www.thingiverse.com/thing:2404673), and I decided to make an advanced version of BMO with RPi2 & 3 for better performance. This time, I made BMO Assistant speaker with Google Assistant instead of a game console. The same screen used in my previous project is utilized for this project. (You can use any 3.5-inch screen with RCA input for this project, or if you don't want the animated face, you can design and attach the face panel instead of using the screen.) The screen from the link has a voltage regulator (4-13V to 5V) inside, so it works with RPi's 5V output. https://www.aliexpress.com/item/3-5-Inch-Pocket-sized-TFT-LCD-Color-Car-Rear-View-Monitor-Rearview-Parking-Monitor-2/32235404646.html?spm=a2g0s.9042311.0.0.2R0z7x For audio output, a 2-channel amplifier with PAM8403 and volume control potentiometer are used along with two 4ohm 3W speakers (or any amplifier-speaker combination can be used). https://www.aliexpress.com/item/Super-Mini-PAM8403-DC-5V-2-Channel-USB-Digital-Audio-Amplifier-Board-Module-2-3W-Volume/32753590149.html For audio input, a mini USB microphone is used. You can use any different usb audio hardware, or implement by using extra PWM audio input/output hardware. https://www.aliexpress.com/item/Overfly-Super-Mini-USB-2-0-Microphone-Portable-Studio-Speech-Mic-Audio-Adapter-Driver-Free-for/32835259347.html For the connection of RPi's 3.5pi audio and video output, please refer to the image here: http://4.bp.blogspot.com/-U6UDlBzBcbg/VWSg9x6vlcI/AAAAAAAAA7o/EDeERYuxhA0/s1600/11218708_1638229279732407_7952221400904068770_n.jpg I soldered wires directly on the bottom of the RPi board. If you don't want to solder directly on the board, just use 4-polar cable for A/V output, but I don't recommend this way. It will make BMO's back look ugly. The reference open source project for this AI speaker is GassistPi on GitHub by shivasiddharth (https://github.com/shivasiddharth/GassistPi). I modified the project for showing face animation and YouTube thumbnail. To implement these functionalities, Pygame Python library is used. Modified source code will be uploaded soon. The triangle button on BMO's front face is used for stop button configuration explained in the GassistPi project. If you're not using the button as the stop button, you can also use it for any function: As I used the button for power and reset in my previous project. To fix the board on the bottom panel, M2.5 screw with 4-6mm length can be used. All other holes have a 2.9mm diameter; M3 4mm can be used for all other holes. Refer to the Gassistpi's readme description for setting up Google Assistant. Modifications and source code for BMO's face will be updated with source code soon. See working videos here: https://youtu.be/jgEbc8pMZ9k https://youtu.be/qHsGePOe33o This is still a working project, any suggestions and questions are welcomed. If you have any suggestion or question, don't hesitate to ask. Thanks.