Hi,
I want to frequently activate/deactivate the above named humidifier module with my Arduino Nano board. Everything works fine if I connect VCC and GND with the Arduino. Here, I am perfectly able to control the module state via EN pin.
However, if I connect VCC and GND with an external power supply (5V, 1,5A) the module is constantly on high and the connected Trasducer is constantly oszillating & creating mist - independently of the state of the EN pin!
Do you know why this happens? What did I do wrong? I need to externally supply the module because the humidifier module affects an LCD that is also connected (via I2C converter) to the arduino board. Each time the humidifier module is high, the LCD becomes less bright.
Thanks for the help,
Sanoj