This full colour student resource has been specifically written to support students through their GCSE Engineering course.DC motor design is quite simple. A permanent magnetic field is created in the stator by either ... A piezo buzzer uses a transistor circuit to supply a varying voltage to a piezo-electric disk. The disk flexes and vibrates when the varying voltage isanbsp;...
|Author||:||Steve Wallis, Neil Godfrey|
|Publisher||:||Nelson Thornes - 2004-07-01|