Just adding another data point on the LCR-TC2 to this thread. Old vs new version, both from "Z industry store" on Aliex 18 months apart. New: Custom case based on original generic case, f/w v3.1E, PCB T7-PLUS v2.0, unmarked 32 pin MCU
This MCU is likely to be LGT8F328P. Other EEVblog posts report successfully replacing LGT8F328P with Atmel ATmega328P. The hardware mod is simple: Only a few pins have different functions. However, existing -K or -M firmware needs modification for mega328P to work with this PC board. When time permits I plan to try this myself.
This week I received 5x LGT8F328P boards which are
(somewhat similar) to the popular
(Arduino) "pro-mini" board. A "boards" definition package is available for using these LGT8F328P boards with the Arduino IDE. I intend to experiment with Transistor Tester software which has been ported to the LGT8F328P. But first I will get familiar with the LGT8F328P by comparing its performance to Atmega-based Arduino boards
(which I've been using for >10 years).To me the LGT8F328P has an interesting feature set:
Its I/O pins have full 5V capability, and a "handful" of them (not all) are rated at
80mA. This may be useful for the Transistor Tester because larger I/O output current corresponds to lower internal resistance/impedance. This
might improve accuracy for measurements of small resistance and for capacitor ESR. The LGT8F328P would get even more attention from me if the manufacturer introduced a version with
64k flash.