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Adafruit 413 Push-Pull Solenoid, Large, 12VDC
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About Adafruit 413 Push-Pull Solenoid, Large, 12VDC
Solenoids are basically electromagnets: they are made of a big coil of copper wire with an armature in the middle. When the coil is energized, the slug is pulled into the center of the coil. This makes the solenoid able to pull or push.This solenoid in particular is nice and strong, with a 40mm long body and a captive armature with a return spring. This means that when activated with up to 12VDC, the solenoid moves and then the voltage is removed it springs back to the original position, which is quite handy. Many lower cost solenoids are only push type or only pull type and may not have a captive armature or do not have a return spring. This solenoid has 4xM3 metric threaded holes in the bottom for easy mounting.To drive a solenoid you will need a power transistor and a diode, check this diagram for how to wire it to an Arduino or other microcontroller. You will need a fairly good power supply to drive a solenoid, as a lot of current will rush into the solenoid to charge up the electro-magnet, about 250mA, so don't try to power it with a 9V battery. Works best with a 12V power supply.
