? Introduction ? This module is designed based on the principle of resistance voltage division, which can reduce the input voltage of terminal interface by 5 times. The analog input voltage of ARDUIN is 5V, so the input voltage of the voltage detection module should not be greater than 5V×5=25V (If the 3.3V system is used, the input voltage cannot be greater than 3.3Vx5=16.5V). Because the Arduino AVR chip has 10-bit AD, the analog resolution of the module is 0.00489V (5V/1023), so the minimum voltage of the input voltage detection module is 0.00489Vx5=0.02445V. ? Parameter ? Voltage input range: DC0~25V Voltage detection range: DC0.02445V~25V Voltage analog resolution: 0.00489V DC input interface: The terminal is connected to VCC and the terminal is connected to GND Output interface: "+" connects to 5/3.3V, "-" connects to GND, and "S" connects to the AD pin of the ARDUIN

There are four parts in a set of modules that you can use in many projects. Size: 13.7mm×27.3mm(0.54 in x 1.07 in). Voltage detection range :DC0.02445 V-25 V. ? Voltage input range: DC 0 ~25V, voltage analog resolution :0.00489V. The voltage tester module is designed based on the principle of resistance voltage divider, which reduces the input voltage of the interface by 5 times.