These are the first results of the working smart shopping bag project. Finally I got the Load Cell 10kg straight Bar sensor and the Load Cell Amplifier HX711. Interfacing them is simple with Arduino. There are also libraries available in Arduino to use the load cell.
Connecting the load cell to the Arduino board via the amplifier
The test setup
I2C operated LCD to see the load results
The load cell should be calibrated with 100g so i chose to use the spicy sauce
reset the scale to 0grams
No weight measurement. Sometimes some offset can be seen which have to be reset everytime
measuring other items such as cream.
The working Load Cell 10kg straight Bar with Amplifier HX711 connected to Arduino and displaying message on LCD via the I2C
Working demo if the project
Adding the flex Panel LED array to the mix and connecting to Arduino
Working video with different messages to the flex-led panel
Where to buy Hardware:
Load Cell 10kg straight Bar sensor https://www.sparkfun.com/products/13329
Load Cell Amplifier HX711 https://www.sparkfun.com/products/13879
How all the sensor fits to the shopping bag.