Uploaded September 2017 | Updated September 2026, 1 week ago

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Such external LED Matrix display is perfectly readable from even 10 meters and very useful during monitoring measured values for longer time.

DMM used here:
Vici/Vichy VC99 - quite old but still very decent 6000 count DMM with bargraph and many features

Watch my previous video youtube.com/watch?v=FPksaFYixVQ with details how to modify VC99 or any other DMM based on FS9922-DMM4 chip.

Source code:
drive.google.com/drive/folders/0B_jncvz2HAYCLVhHbmotcnpKWmM?resourcekey=0-cJq5TJ6c0JqooEJ1v44PDw&usp=sharing