Grove Water Atomization - Connecting 10 Modules to Arduino?

Products & Technology Grove
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Hi. I’d like to connect up to 10 water atomization modules to Arduino Mega at once. They shouldn’t run simultaneously however, so while one is active, the others should be set to low.

1. Can I connect the modules directly to the Arduino pins without using the Grove Shield? Do I need 4 pins or only 3 pins for each module? Do I need to connect to special pins, digital or analogue ones?

2. Do I need an external power supply or can I simply use the 5V of Arduino (to keep 1 module active and the others at low)?

3. Is direct contact with water required, or can I use a damp sponge or cotton instead?

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Hi there So it looks like you’re trying to use a 5 volt DC device IO with a 3.3 volt signal verify that both devices are compatible.
I don’t need the shield if you don’t want to use a push button you can hook it directly to this MCU.
You only need 3 pins, vcc, gnd, en…
N/c is no connection.
The enable pin is used to start things up,
Then a timer is used to set a read data window, to control how long you atomize.
Sensor placement and water level.

Check the many wiki links. For examples.
HTH

GL :grinning_face_with_smiling_eyes: PJ :victory_hand:

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This device may be able to help you… the 5v will also be an issue FYI