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Yes. that's an LGT8F328. Pin 21 is SWD which is also part of the SWD programming interface (Gnd, Vcc, SWD, SWC, Reset). Pin 21 of a genuine 32-TQFP ATmega328 would be Gnd.
I measured a capacitor, which was discharged behind the multi meter and is now dead, so I wanted to know if it had any protection.
Have you already tried with U2 and D1 (weak input protection) removed?
Quote from: SA on May 29, 2024, 05:49:11 pmI have fried my TC1 with charged capacitor. The MCU also fried. My TC1 comes with ATMega328p DIP IC. I am not an expert in but if I could get complied code, I would be able to fix it. Please help me There are compiled versions out there. But on another note, while a pin or two might be fried, you may still be able to read the Flash and eeprom. (You need both) Then simply write it to a new chip.Depends on whether the chip has copy protect enabled or not.
I have fried my TC1 with charged capacitor. The MCU also fried. My TC1 comes with ATMega328p DIP IC. I am not an expert in but if I could get complied code, I would be able to fix it. Please help me
Yes, I replaced the U2 and D1 is fine.After replacing it came to life but showing cell from 1-2 pin. The mcu also heating. So I have to replace the atmega328p. But I need the compiled code and Fuse bits. I will be greatful if you please help me.
In case you're looking for an OSHW firmware: https://github.com/madires/Transistortester-Warehouse
You can replace the ATmega and program an OSHW firmware. You'll also need to reprogram U4 or replace it with a simple two-transistor circuit.