In this video we test various ways torque can be increased on the 28BYJ-48 stepper motor. We test the motor in unipolar and bipolar mode with ULN2003, L293D and A4988 motor driver. We will eventually see whether this motor can lift 2KG. We use ESP8266 for all the microcontroller needs.
Automating Ikea Tupplar Roller Blinds
https://www.youtube.com/watch?v=7t00NgeBgO8
Converting 28BYJ-48 from Unipolar to Bipolar
https://www.youtube.com/watch?v=QL3mjnF9lvE&t=242s
Codes
28BYJ-48 with ULN2003 Unipolar Stepper driver
https://gist.github.com/samirsogay/43b87d7830d98a54a6bff6f994b9ff16
28BYJ-48 with L293D Bipolar Stepper driver using DOIT Motor Shield
https://gist.github.com/samirsogay/991402247b7f0f74d617230249c97753
28BYJ-48 with A4988 Bipolar Stepper driver
https://gist.github.com/samirsogay/1ea6efbb33ff64e55ed04c8b595d3822