This circuit is designed to test low voltage AC motors and power, for example those used in PC hard disks or the CD player.
The circuit works by generating a cyclic burst of pulses in the three coils, thus achieves the rotor displacement.
You add a speed control to tune the engine more responsive.
The main blocks are based on 555 timer, this timer control motor speed. The sequencer on the basis of 4017, with the blast generated sequences for the three coils, and finally the stage of power based on power transistor TIP31C NPN (should dissipate).
The circuit is as follows:
The circuit works by generating a cyclic burst of pulses in the three coils, thus achieves the rotor displacement.
You add a speed control to tune the engine more responsive.
The main blocks are based on 555 timer, this timer control motor speed. The sequencer on the basis of 4017, with the blast generated sequences for the three coils, and finally the stage of power based on power transistor TIP31C NPN (should dissipate).
The circuit is as follows:
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