Solenoids are basically electromagnets: they are made of a big coil of copper wire with an armature (a slug of metal) 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 (from one end) or push (from the other)
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 24VDC, 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 (it'll fall out!) or don't 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!
- 24 DC operation (you can use 9-24 DC volts, but lower voltage results in weaker/slower operation)
- Push or pull type with 10 mm throw
- Coil resistance: 43 ohms
- 15 Newton starting force (24VDC / 50% duty cycle)
- 5.1 oz / 144 grams
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Documentation and Resources:
- The Maker Revolution
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
- Controlling a Solenoid with an Arduino
We covered a whole bunch of rotational motion when we looked at DC motors. It’s only fair to give linear motion the same treatment. Electric solenoids work on similar electromagnetic principles to those of DC motors, however, solenoids can u...
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