Get 10 Arduino sized PCBs for $5 at www.pcbway.com/ ! In this episode of my DIY budget 3D printer we're building a custom, GRBL and Marlin compatible, UNIPOLAR stepper motor driver to control the 28BYJ-48 based extruder!!! Chronic UniStep as I've decided to call it is just as easy to use as the ubiquitous A4988 for bipolar steppers - except it's a better fit for high-impedance unipolar motors like the ones you can salvage from e-waste! If you guys want me to open-source this invention let me know! Also I might have to do a seperate video to explain why you would use a dedicated unipolar stepper motor driver instead of just converting unipolar motors to bipolar like I had planned to do with all of mine...
Here's the test code I used:
Bidirectional speed control potentiometer:
drive.google.c...
Affiliate links* to the ICs and some parts I got for this printer:
10pcs CD4017 decade counter IC (SMD version): s.click.aliexp...
10-20pcs ULN2003A SOP-16: s.click.aliexp...
5pcs A4988 stepper motor drivers: s.click.aliexp...
Cheapy hotend kit: s.click.aliexp...
Arduino mega 2560: s.click.aliexp...
4010 turbine fan: s.click.aliexp...
100k NTC temperature sensor for heated bed: s.click.aliexp...
10m nylon coated fishing line: s.click.aliexp...
Keep in mind I got a few of these items during sale, so the total might well be above $50 now (especially with inflation)
if you decide to purchase something through an affiliate link I may receive a small commission
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Негізгі бет DIY 3D printer part 8 - making a UNIPOLAR stepper motor driver for my 28BYJ-48 based extruder!
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