Hi all ......
I am a newbie in this ...... and i need help badly..... how can i connect a solenoid (24V DC) valve to arduino......
please help
Google is your friend
http://playground.arduino.cc/Learning/SolenoidTutorial
You can not drive a solenoid directly from your Arduino. It requires more current than you can provide and produces destructive voltages when it is switched off. There is a simple solution.