Hello, my name is Taehoon Yi.
I'm trying to control two Diaphragm Pumps (12VDC/4.3W) and four Solenoid Valves (24VDC/10W) with Arduino Uno.
I know there are many different ways to control these parts, but first I've purchased two Motor Drive Shields (http://www.sainsmart.com/sainsma...) since one couldn't control all 6 components.
But now I found out that the Motor Drive Shields are not stackable, and I have no idea how to connect those two Motor Drive Shields together.
Now, I decided to use two stackable relay shields (http://www.dfrobot.com/index.php...) to control my system.
So my question is, can I still use two Motor Drive Shields to control my system, or should I just use two stackable 4-way relay shields?
I just want my valves to open/close and my pumps to start/stop.
Is there any better way to control my system?
And if I decide to use the relay shields, do I still need transistors, resistors, etc.?
Thank you so much,