The Spice of Pi - Blog Doug 2

21 Jan 2018

Spice of Pi Hardware Block Diagram

Preliminary BoM

Part Number	Description	image
Raspberry Pi 3	SoC: Broadcom BCM2837 CPU: 1.2 GHZ quad-core ARM Cortex A53 GPU: Broadcom VideoCore IV @ 400 MHz. Memory: 1 GB LPDDR2-900 SDRAM. USB ports: 4. Network: 10/100 MBPS Ethernet, 802.11n Wireless LAN, Bluetooth 4.0
Raspberry Pi 7" Touchscreen	7” Touchscreen Colour Display Screen Dimensions: 194mm x 110mm x 20mm (including standoffs) Viewable screen size: 155mm x 86mm Screen Resolution 800 x 480 pixels 10 finger capacitive touch Adapter board
Google Voice Hat	stereo speaker driver dual microphones 6 servo connectors I2C connector SPI connector 4 DC motor drivers & connectors uart connector
MG996R Servo Motor	Ball Bearing Servo Motor - to raise spice jars Weight: 55g Rotation angle: 180 degrees Dimension: 40.719.742.9mm Stall torque: 10kg/cm Operating speed: 0.20sec/60degree(4.8v) Operating voltage: 4.8-7.2V Temperature range: 0_ 55 Servo Plug: JR (Fits JR and Futaba) Spline Count: 25
GWS S125 1T/2BB Servo Motor	Ball Bearing Servo Motor - to rotate spice carousel Weight: 50g Rotation angle: 360 degrees Dimension: 40.52042mm Stall torque: 6.6kg-cm Operating speed: 0.21sec/60degree
Spice Bottles	diameter: 47.5 mm height: 113 mm weight: ~160 g
Carousel Platter	diameter: 30 cm ball bearings & 8 mm axle
Power Supply	5 Volts 4 Amps
Display Case	TBD
System Base Package	TBD - custom

The Voice Hat has connectors for 6 servo motors, 4 of these will be used for the spice carousel. Each of the two servo motors will require a servo channel plus an extra channel to turn off power to the servo motor when there is no activity.

Design Challenge Links:

Pi Chef Design Challenge

About the challenge

The other challengers

The kit

Terms & Conditions

Project Links:

Blog Doug 1 - The Concept

Blog Glenn 1 - AIY Voice Kit Unboxing

Blog Doug 2 - The Block Diagram and Bill of Materials

Blog Doug 3 - Spice Jar Lift Mechanism