Hi!
The purpose of this thread is to document as fully as I possibly can, in English, the evolution of the XJW01 Chinese LCR Meter, highlighting all the changes and revisions with better (and hopefully clearer!) documentation!
It is my intention to translate, as best as I can, the original source code, circuit-diagrams and PCB layouts into clear English that can be understood by anyone here!
The original version was made using a four-digit 0.56" multiplexed common-cathode LED display and individual LED indicators labelled to show unit/range, on PCB rev 2.0., whilst the LCD version was first designed to use V2.0 PCB and modified code before a purpose-made LCD version was designed, v3.0.
Hope this will assist other members interested in this equipment - I have one of the kits on order myself!
The version attached is the Original Chinese design as it began.
Chris Williams
PS!
The Data Sheet for the MCU is enormous - it runs to 439 pages (!!!)