Reference Design Library > Sensor Solutions > Other Sensing Solutions > MCP3421DM-WS: 2kg Weight Scale w/ USB & LCD

MCP3421DM-WS: 2kg Weight Scale w/ USB & LCD

Summary

The MCP3421 Weight Scale Demo Board works with the LabVIEW™ Graphical User Interface (GUI) PC Software. This demo board demonstrates how to use the MCP342118-bit Delta-Sigma ADC for weight scale applications.

It uses the PIC18F4550 microcontroller for data processing and USB communication with PC. This board also demonstrates the changes in the system performance by adjusting the parameters of the sensor signal conditioning circuits using the MCP6V07 auto-zeroed op amp.

Feature Highlights
  • The LCD displays the user’s selected option and the ADC output code or the
    calculated results.
  • The user can select the signal averaging factor (1 or 4) by pressing the S3 button.
    The selected option is displayed on the LCD.
  • System performance analysis using PC GUI: the interface allows various
    interactive post signal processing, such as standard deviations and histogram.
  • Hardware PCB design examples: this demo board utilizes a robust grounding
    method of analog circuits in PCB design. It also demonstrates how to split analog
    and digital ground planes.
  • Signal conditioning examples using MCP6V07: the low-noise op amp is used to
    boost input signal levels.
  • 2 Kg load cell with 1 mV/V sensitivity.

Specifications

Manufacturer Microchip Technology
Category Sensor Solutions
Sub-Category Other Sensing Solutions
Eval Board Part Number MCP3421DM-WS-ND
Eval Board Supplier Microchip Technology
Eval Board Board not Stocked
Purpose Weight Scale
Range 0 ~ 2 Kilograms
Sensing Method Load Cell
Voltage In 9 V
Features GUI / Design Software
USB Interface
Design Author Microchip Technology
Component Count + Extras 67 + 12
Main I.C. Base Part MCP3421
Date Created By Author 2010-11
Date Added To Library 2012-04

Support Documents & Media

MCP3421 - Datasheet MCP3421DM-WS - User Guide MCP3421DM-WS - Software v1.0 MCP3421DM-WS - Firmware MCP3421DM-WS - BOM

Media

MCP3421DM_WS_Schematic_Full.PNG MCP3421DM_WS_Board_Full.PNG