Arduino Playground is read-only starting December 31st, 2018. For more info please look at this Forum Post A Solenoid Tutorial. 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. Solenoids take a lot of power The solenoid I was testing with is a 12 volt solenoi
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