Thanks!

[wocard2]

Thanks for this great project and for making it available! I was in the process of investigating what ADC to use for my own LCR meter when I stumbled across this project. Here's my variant of your LCR Meter (please excuse my inaptitude at taking pictures):

I made some modifications to your design:

• the device is battery-powered (lipo battery) and charged via USB; see the battery voltage in the lower right corner
• the display uses a different controller (ST7789V2) and a different touch controller (FT6336)
• I use a different STM32 MCU with fewer pins (STM32F411RE)
• no isolation is used as the device is battery-powered
• as the DC/DC converter module is gone, the high bias voltage is created by a boost converter (MT3608)
• the boost converter is only turned on if the bias voltage exceeds some threshold
• the op amp is an LM7321 (R2Ri and R2Ro)

[jankae]

Awesome, thanks for sharing this! As far as I am aware, you are the first to succeed in replicating this project :)