Size: 25mm*13mm/0.98"*0.51"(approx). |
TThis module is based on principle of resistive voltage divider design, can make the red terminal connector input voltage to 5 times smaller.Arduino analog input voltages up to 5 v, the voltage detection module input voltage not greater than 5Vx5=25V (if using 3.3V systems, input voltage not greater than 3.3Vx5=16.5V). Arduino AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023), so the minimum voltage of input voltage detection module is 0.00489Vx5=0.02445V. |
Voltage input range: DC0-25 V. |
Voltage detection range: DC0.02445 V-25 V. |
Voltage analog resolution: 0.00489 V. |
Output Interface: "+ " connected 5/3.3V, "-" connected GND, "s" connected Arduino AD pins. |
DC input interface: red terminal positive with VCC, negative with GND. |
By 3P connector, connect this module with the expansion of board Arduino, not only makes it easier for you to detect voltage battery, can also use the IICLCD1602 LCD to display voltage. |
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Reference Code: #include <Wire.h> int val11; int val2; void setup() { pinMode(LED1.OUTPUT); Serial.begin(9600); Serial.println("Emartee.Com"); Serial.println("Voltage: "); Serial.print("V"); } void loop() { float temp; val11=analogRead(1); temp=val11/4.092; val11=(int)temp;// val2=((val11%100)/10); Serial.println(val2); delay(1000); } |