Arduino & Google Cloud-Based Food & kcal Tracker
A smart kitchen weight scale, which tracks the kcals you've eaten in a Google Cloud-based spreadsheet!
Components and supplies
3
MCP23S17
1
MAX7219 Dot Matrix Module 8x32
1
SparkFun Load Cell Amplifier - HX711
1
Arduino MKR WiFi 1010
1
SparkFun Logic Level Converter - Bi-Directional
1
Load Cell - 5kg, Straight Bar
Tools and machines
1
Wire Stripper No. 5
Apps and platforms
1
Google Sheets
Project description
Downloadable files
Circuit diagram
The decoupling capacitors for MCP23S17's are not shown due to lack of space. I used 0.1uF ceramic caps to connect VDD and VSS. Also, the diagram does not include wiring to the push buttons, but in short: Two MCP's handle all the rows, and the third MCP handles the five inputs required for the columns. You can see the exact ports from the embedded code.
Circuit diagram
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