Small Push Pull Solenoid 412 Adafruit Industries

Solenoids are similar to electromagnets: composed of a large coil of copper wire with an armature (a cylinder of metal) in the center. When the coil is powered, the armature is pulled into the center of the coil. This allows the solenoid to pull (from one end) or push (from the other). this solenoid is fairly small with a 30mm long body and a captive armature with a return spring. Many lower cost solenoids are only one Type, push or pull, and may not have a captive armature (it just falls out) or doesn't have a return spring. 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 because a lot of current will rush into the solenoid to charge up the electro-magnetic, about 100MA, 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). DC coil resistance: 100 ohms. 5 Newton starting force (24Vdc). package dimensions :1.905 cm L x 5.842 cm W x 7.62 cm H This allows the solenoid to pull or push