Stepper Motor and ULN2003
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A stepper motor is a motor where the turning can be controlled in steps.
Our motor has about 508 steps for 360° (the motor itself has 64 steps but there is a gear train on top)
- see https://github.com/zhcong/ULN2003-for-ESP32
ULN2003 driver module.
How to connect it electrically
Required Module and Files
- We use Stepper.py
- this is downloaded from https://github.com/zhcong/ULN2003-for-ESP32
- the original file is at https://github.com/zhcong/ULN2003-for-ESP32/blob/master/Stepper.py
- this is based on: https://github.com/IDWizard/uln2003 by (c) IDWizard 2017,MIT License.
How to control it in MicroPython
1 import Stepper 2 from machine import Pin 3 4 In1 = Pin(32,Pin.OUT) 5 In2 = Pin(33,Pin.OUT) 6 In3 = Pin(25,Pin.OUT) 7 In4 = Pin(26,Pin.OUT) 8 9 s1 = Stepper.create(In1,In2,In3,In4, delay=10) 10 11 s1.step(509,-1) 12 13 s1 = Stepper.create(In1,In2,In3,In4, delay=1) 14 15 s1.step(509)
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