Module introduction:
This module is designed based on the principle of resistance divider, which can reduce the input voltage of the terminal interface by 5 times. The maximum analog input voltage is 5V, so the input voltage of the voltage detection module cannot be greater than 5V×5=25V (if a 3.3V system is used , The input voltage cannot be greater than 3.3Vx5=16.5V). Because the AVR chip used is 10-bit AD, the analog resolution of this module is 0.00489V (5V/1023), so the minimum input voltage detected by the voltage detection module is 0.00489V×5=0.02445V.
parameter:
Voltage input range: DC0?25V
Voltage detection range: DC0.02445V-25V
Voltage simulation resolution: 0.00489V
DC input interface: the positive terminal is connected to VCC, and the negative terminal is connected to GND