Hacking a scale to log data with seeduino

Using Arduino Sensors
#1

Hi :slight_smile:
I have a project in which I am reading data from many sensors to a Seeeduino Lotus v1.1 and uploading it to some excel sheet.
I would like to do that also with a high percision weight scale (I need percision of 0.01 grams). All the guides I saw on the net use apart from the scale another electronic feature - HX711 (or something similar). is this feature necessary for the amplifying of the signal or is it used only as an analog to digital converter?
I am asking becuase the seeduino already has the converter built in.

examples of guides:
https://learn.sparkfun.com/tutorials/iot-weight-logging-scale/all

https://www.hackster.io/Fedeasche/arduino-uno-high-precision-counting-scale-3f484b

#2

Scale sensors require both an amplifier and an analog to digital converter.

#3

gklsngagasfgg:
...a high percision weight scale (I need percision of 0.01 grams)...

What maximum weight do you need to weigh?
How accurate do you need your system to be?

Rather than hacking a scale, it would be much easier and faster (though less fun) to reliably get the desired precision and accuracy if you buy a scale with an RS232 or other easy-to-connect-to-Arduino interface.

Something like this 2kgx0.01g scale, for example. It's only 1,400 USD.

Or this 200gx0.01g scale, only 400 USD.

If you want to DIY, read this to get a feel for some of the challenges.

#4