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Voltage Current Sensor (MAX471)
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This module can be used to test the current and voltage.
The principle of voltage test based on the principle of resistive voltage divider design,can make the red terminal connector input voltage to 5 times smaller.
For Arduino analogue 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).
For Arduino AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023), so the minimum voltage of the input voltage detection module is 0.00489Vx5=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 work on 5V) or DC3 - 16.5V (for
Arduino work on 3.3V)
Test Current range: DC 0 - 3A
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