ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board Compatible with Arduino

good price for the four motors, now time to work on some projects with these.

Good kit of inexpensive motors for a small project.

cheaper product that do the job

For the low price you wouldnt expect high quality stepper motors and drivers. However these perform amazingly well in both torque and accuracy for their price and size. I was hesitant at first but am happy with my purchase and would buy again. They do tend to heat up after extended use or with heavier loads, however for most applications of stepper motors this isnt a problem. If you are looking at these and wanting high speed rotation & long continuos running then a regular DC 5-9v motor would better suit you. Which is what these will provide you. They dont spin fast looking at the external shaft rotation however the inner gears & 4 phases allow you to use multiple step types depending on your need. Including wave step driving with each phase cycling one on at a time giving the simplest controlled rotation for beginners. Or full step using two of four phases on at a time for highest torque. Or Half step using a mix of two phases of full step with one phase alone in between, to give highly accurate movements with medium torque. The only suggestions I would have is buy or setup a separate dc power supply for these as the arduino or other micro controllers wont have the volts and mA that you need. Also if youre a beginner or new to arduino or micro controllers or stepper motors this is for you it is simple to set up, no soldering, no prior stepper knowledge required; just plug in motor to driver, hook up all four driver digital input pins to a micro controllers digital output (like arduino, raspberry pi, etc) plug ground and power cables to relating micro controller pins or seperate power supply pins and youre done. All thats left is running a code thru micro controller. I will note however that you will need more male to female cables if you plan to hook up more than 2 stepper drivers to micro controller; Good for both experienced users for projects/fun and good for beginners who are learning about steppers or just getting started, the LED lights are beneficial for troubleshooting and making sure your code works properly. I took one of the steppers apart. Taken apart theres Aluminum casing outer shell, 1 layer of 8 teeth on casing bottom & 3 layers of 8 teeth each interspersed inside center hole of the coil plastic rings sitting on top of first teeth layer, giving you 4 layers/phases & 32 teeth total or 32 steps. Both coils are wrapped around plastic rings and sealed. Soldering on steppers and drivers look & feel solid. First coils ends being the yellow and blue wires respectively. But being unipolar the center of the coil is also connected by center tap to red wire. Bottom coil is same with ends being orange and pink, center wires are connected between both coils into single red wire. The rotor is plastic with a permanent magnet surrounding it, the rotor shaft has 9 teeth. That shaft extends up to top plate that has 3 ganged gears plus the gear for external gear shaft. All these together do infact give you a 64:1 ratio where 64 rotations of the rotor = 1 rotation of the external gear shaft. Note that one rotation of the rotor requires the 4 phases 32 steps to make one full rotor rotation. So a lot of rpm is needed to give you even 10rpm of the external shaft. This is where torque is created and heat is generated, Seems solidify enough built for its power rating and most stepper uses, mechanically the gears are setup for best possible torque

I got one of these with another ELEGOO set and needed more. This was convenient and very much the right price. Motors have the connectors to the board at the end of a 9 cable. 10 Dupont jumpers (M-F. 7) also provided, consider as a bonus, not enough to connect all the driver boards at once, so a bit of a mystery. Driver IC is socketed. It all comes in a nice plastic storage box.

These stepper motors are small and perfect for a small-scale application. They are not as precise as a NEMA stepper but perfect for the price. I am using them to control a clock.

Simple set up and works good!

Fantastic value and easy/fun to use as a first project on arduino or raspberry pi.

Excelente producto.

Best small motors, for small projects, in the market .....