Apologies if this is in the wrong location.
A while ago I bought a few of the 28BYJ-48 stepping motors from eBay, as I already had one from a kit that worked fine. The ones I purchased all came with a slightly different controller board using the ULN2003 chip. There are 8 input pins IN1 / IN2 / IN3 / IN4 / VM / VCC / VCC / GND but it does not have any of the LEDs to show the steps being pushed through.
No matter what I have tried I cannot get this to work.
In the end I took apart my old project to get the controller board from that, plugged it in and then it worked straight away.
The attached image shows the controller on the right I cannot get working (tried two and different wires etc.) the one lit up is obviously all working.
Nothing complicated, all I was trying to do was get the motor rotating at a constant speed.
Any help would be appreciated as I will look to see if I can buy these LED lit boards on their own for the motors I have.