This DC voltage sensor can detect voltage from 0 to 25 v. Sensor is based on resistance points pressure principle, and it can reduce the input voltage of red terminal 5 times of original voltage.
The max Arduino analog input voltage 5 v, so the input voltage of this module should not exceed 5 v x 5 = 25 v (as for 3.3 v system, the input voltage should not exceed 3.3 v x 5 = 16.5 v).
Because the Arduino AVR chip have 10 bit AD, so this module simulation resolution is 0.00489 v (5 v / 1023), and the input voltage of this module must be more than 0.00489 v x 5 = 0.02445 v.
1*Voltage detection module
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.