Quote:
Originally Posted by Mad Cows
The valve is the festo VUVG-L10-B52-T-M7-1P3.
The arduino shield is the Sparkfun ardumoto. I have read its output as 10 to 11.5 volts.
I cannot seem to get a reading in the amperage though the website says it can supply up to 2 amps.
The arduino adapter is actually a netter power source that can provide up to 1.5a and 12v. The shield gets its power from the vin port.
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Have you added a relay to this motor controller shield?
To make the solenoid work, all you need is a transistor or relay and a 24V source. You are going to use a low voltage (5V) digital pin of the Arduino board to switch on a higher voltage (24V source from a battery or power supply). The transistor/relay is going to allow the 24V circuit to close and complete the circuit on the solenoid when the low voltage from the Arduino is applied.
Can you provide a photo of your setup?
However, I think the laws of physics indicate that doing so is going to be very difficult at best. - EricH [more] 
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