Introduction

This document provides an overview of the M181 LCR Meter GitHub repository.

Goal is to develop only the Firmware for M181 LCR Meter made by JyeTech. Hope to provide understanding in basics of LCR Meter.

Hardware - M181 LCR Meter

• Official product page link here
• I have purchased from Banggood, buying link is here

Setup for programming

• Programmer → Raspberry pi debug probe (**modified)
• Interface → SWD
• IDE → PlatformIO
• Framework → STM32Cube

Note: Still this firmware under development.

Tasks to be completed

• Zero Padding function (ADC offset)
• Auto calibration option
• Improve the phase difference calculation
• Fix issue in missing to capture the button press input
• Correct the current waveform crop issue in auto gain selection.
• Add option for Parallel calculation (\(C_p\),\(L_p\))

Context

Explore the following sections for detailed information:

• Hardware Description
  Learn about the hardware design and components of the M181 LCR Meter.

• Frontend Driver
  Understand the firmware design and driver implementation.

• Signal Processing
  Dive into the signal processing techniques used in the system.

• Impedance Calculation
  Discover the methods for calculating impedance with the M181 LCR Meter.

Credits

• JYETech
• Maximilian Gerhardt