user27363: Today I received normally closed solenoid valve which I am going to use in automated pot watering system , 
I realised the valve takes 24 dc volt as input and Arduino has maximum of 5volt , using some power booster I can convert it to some extent but I think 24 volt is too much .
So how should power 24volt solenoid valve from Arduino uno?

user28225: Since the solenoid requires higher current than the arduino can provide you can use an alternative power source for the solenoid (maybe a couple of batteries) and switch it with a TIP120 transistor.

27363: <p>Today I received normally closed solenoid valve which I am going to use in automated pot watering system , 
I realised the valve takes 24 dc volt as input and Arduino has maximum of 5volt , using some power booster I can convert it to some extent but I think 24 volt is too much .</p>

<p>So how should power 24volt solenoid valve from Arduino uno?<img src="https://i.stack.imgur.com/CRrtO.jpg" alt="enter image description here"></p>
 28225: <p><a href="https://i.stack.imgur.com/GKPUO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GKPUO.png" alt="enter image description here"></a>Since the solenoid requires higher current than the arduino can provide you can use an alternative power source for the solenoid (maybe a couple of batteries) and switch it with a TIP120 transistor.</p>
