This is a 5kg kitchen balance, created with arduino uno!

You can chose the platform u want, but i prefer arduino:

Arduino uno : https://www.banggood.com/it/Wholesale-Arduino-Compatible-R3-UNO-ATmega16U2-AVR-USB-Board-p-68537.html?rmmds=search

Arduno nano : https://www.banggood.com/it/ATmega328P-Arduino-Compatible-Nano-V3-Improved-Version-With-USB-Cable-p-933647.html?rmmds=search

Now the electronics components :

Load cell 5KG : https://www.banggood.com/it/YZC-133-5kg-Kitchen-Scale-Electronic-Load-Cell-Weighing-Sensor-p-982666.html?rmmds=search

HX711 load cell decoder : https://www.banggood.com/it/HX711-Weighing-Pressure-Sensor-24-Bit-Precision-AD-Module-For-Arduino-p-918228.html?rmmds=search

HX711 libraries : https://github.com/bogde/HX711
Arduino ide : https://www.arduino.cc/

Buttons, Resistances and some wires : https://www.banggood.com/it/Electronic-Parts-Component-Resistors-Switch-Button-Kit-For-Arduino-p-967062.html?rmmds=detail-left-hotproducts

Battery case : https://www.banggood.com/it/Wholesale-Plastic-Battery-Storage-Case-Box-Holder-For-4-x-18650-Battery-p-36859.html?rmmds=search

LCD i2c Display : https://www.banggood.com/it/IIC-I2C-1602-Blue-Backlight-LCD-Display-Module-For-Arduino-p-950726.html?rmmds=search

Electric diagram : https://drive.google.com/open?id=1pWG-UBroEXAjUhJkHrtLl0QdvafI_0rB
Code soon :) enjoy