According to the schematic, the DVDD of the HX711 is 5V, which means the output digital level will be 5V, which goes through the CD4067 multiplexer and goes directly to the microcontroller?! No any level shifter anywhere... Which means that logic 1 on the microcontroller input pin will have a level of about 5V. Isn't it dangerous for the microcontroller pin?
According to the schematic, the DVDD of the HX711 is 5V, which means the output digital level will be 5V, which goes through the CD4067 multiplexer and goes directly to the microcontroller?! No any level shifter anywhere... Which means that logic 1 on the microcontroller input pin will have a level of about 5V. Isn't it dangerous for the microcontroller pin?