Review on 🔌 HiLetgo 5pcs ULN2003 28BYJ-48 4-Phase Stepper Motor Bundle with 5V Drive Board for Arduino, PI, PIC & Raspberry Pi by Shawn Sanders

Ok it was great to help me learn how to program my raspberry pi to control a stepper motor but it really can't do that what I want with it. It's too light for my telescope, it skips steps and it has a 64:1 internal gear. This means I can't rotate the telescope quickly because the internal gear is down, and because it skips steps I can't rely on it to be accurate. . The faster I try to start the engine, the more steps it skips. On the other hand, you can connect the control board directly to your Raspberry Pi computer and the Pi's 5V power supply. I've since bought a couple of NEMA 17 stepper motors, which have more power, more accurate pitch, and no internal gearing, which I use on the telescope and some other CNC machines I make. (https://www.amazon.com/gp/product/B07PNZRPQH/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1) Programming is easier with NEMA 17 motors, but you will need an external 12V>1.5 power supply A to drive the motor . I am using an old 12 volt computer power supply.