คำอธิบาย
The voltage test principle is designed based on the principle of a resistor divider, which can reduce the input voltage of the red terminal connector by 5 times.
The analog input voltage is 5V, and the input voltage of the voltage detection module is not greater than 5Vx5 = 25V (if a 3.3V system is used, the input voltage is not greater than 3.3Vx5 = 16.5V). 10-bit AD, so the resolution simulated by this module is 0.00489V (5V/1023),
The small voltage of the input voltage detection module is 0.00489 Vx5 = 0.02445V.The MAX471 chip on the board is used to test the consumption current of the load.
Parameter
- Test voltage range DC3-25V (for Arduino to work on 5V) or DC3-16.5V (to work on 3.3V)
- Test current range DC 0-3A
- Size 19.5 x 20.3mm
Package Included
- 1pcs x MAX471 voltage current sensor module
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