Hello, so I'm still pretty new around here, and also pretty new to electronics.
A week or two back I bought myself one of these; http://www.skpang.co.uk/catalog/product_info.php?products_id=673 datasheet; http://www.sparkfun.com/datasheets/Robotics/SM-42BYG011-25.pdf
and an L293d chip to operate it.
I wrote a very basic code, using the Stepper include, and plugged my motor direct to my Mega board. Worked fine, but with very little torque.
I then tried to copy this circuit; http://arduino.cc/en/Reference/StepperBipolarCircuit
For some reason, coil 1,2 works fine, but 3,4 does not. (I tested this by plugging wires 3,4 direct to the mega, and 1,2 through the L293d)
When I try to use the other half of the L293d, I get no results.
My circuitry is fine, with all the enables high etc, my input voltage is a steady 12 volts. Is half of my L293d broken? or am I being really dumb?
Thanks for any help