Arduino, relay shield and 12 solenoid valves wiring - General Electronics - Arduino Forum

Hi all! I'm new to electric and electronic, and I have a very big doubt on a project i'm working on.. I'm building a machine with 12 aspiration channels, working one at a time. For this purpose, I've bought 12 solenoid valves VT 317 (ideal for vacuum, 24V DC, 6W of consumption), and a Relay shield to control them with an Arduino Mega. I've tested the circuit with only one valve, and everything works fine (open for 1 sec, wait 1 sec, close for 1 sec, etc). My problem is: How can i wire 12 of t

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