05-19-2023, 01:16 AM
don't use finger to touch , it's easy bad for mosfet, It's very sensitive. now maybe your A6 board "level convertor mosfet chip" already bad.
It is better to make shielding for external modules, not on PCB. such as use DS3231 extend I2C module.
First, wrap it with a heat shrink tube, and then wrap it with tin foil or other shielding materials. The shielding layer is grounded to the power source and connected to the vicinity of a large capacitor
It is better to make shielding for external modules, not on PCB. such as use DS3231 extend I2C module.
First, wrap it with a heat shrink tube, and then wrap it with tin foil or other shielding materials. The shielding layer is grounded to the power source and connected to the vicinity of a large capacitor