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[[Image:Lamp_fader.png]] [[Image:Solenoid_control.jpg|300px]]
== Switching a Relay ==
WHY: For really high current loads. To interface digital logic (5V) and AC powered (120v AC) devices. To control the mythical blender.
Use the same circuit as with the solenoid (i.e. diagram above), simply swap the solenoid with a Relay. An electromechanical relay has a giant wire-coiled magnet inside, same as a solenoid.
== Moving a Servo ==