Hello,
yesterday I connected my UNO to a 28BYJ-48 stepper to test it. But the motor does not spin.
I tried an other arduino, external power source, all combinations of the 4 pins (8-11) and different sketches.
zc-a0591 is printed on the driverboard, but it looks like this: http://arduino-info.wikispaces.com/SmallSteppers.
driver is connected to board 5V and GND.
the LEDs are blinking weakly and the motor vibrates and makes sounds. Is it the voltage?