I've bought this EC meter ec meter - DFR0300 - Gravity: Analog Electrical Conductivity Sensor - DFRobot . I have water temperature, EC, PH, ambient temperature sensor and a 20x4 LCD attached to the Arduino. When I check this morning, the EC meter dropped the whole Arduino Mega Vcc to 3 ish Volts and…

EC meter make Arduino 5V drops to 3 ish V

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