21 # Motor 1 is channels 9 and 10 with 8 held high. 22 # Motor 2 is channels 11 and 12 with 13 held high. 23 # Motor 3 is channels 3 and 4 with 2 held high. 24 # Motor 4 is channels 5 and 6 with 7 held high. 25 26 pca.channels.duty_cycle=0xFFFF 27 pca.channels.duty_cycle=0xFFFF 28 stepper_motor=stepper.StepperMotor If you want to control the stepper motor, you still must use a motor driver. - If you want to change the frequency range, you can change C46 capacitance. - power supply: DC15-80V or DC 12V.
Unipolar stepper motors typically have five, six, or eight leads. Bipolar steppers have a single coil per phase and require more complicated control circuitry (typically an H-bridge for each phase). The DRV8824/DRV8825 has the circuitry necessary to control a bipolar stepper motor. Bipolar stepper motors typically have four leads, two for each coil. A stepper motor may be wired in either series or parallel, depending on the needs of the application. A series-wired motor will deliver more stall torque, but torque drops quickly as velocity increases. A parallel-wired motor typically maintains its (lower-than-series) torque to a higher velocity.
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