05-24-2023, 01:24 AM
After a simple simulation, the voltage should change, but our reference voltage may not be the standard 3.3V, so it needs to be calibrated.
The 0-5V incoming signal is divided by 1% precision resistors on the board, the voltage follows, and the limiter enters the ESP32 ADC port.
NTC10K This circuit may not be sensitive to temperatures below 20 degrees, so it cannot be tested