I'm using a BS2e module, a Board of Education Development Board - Serial Version, and a 6 wire- 9.5 V stepper motor. The weird thing is I only connect the 4 phases only, without the 2 RED wires connected (Power wires) the motor still running. My question is do I need to connect all 6 wires? And does the torque of the motor decrease because of the RED wires not connected?
Here is the diagram I connect for the 4 phases:
' P4 -> ULN2003.1, ULN2003.16 -> Phase 1 (Black)
' P5 -> ULN2003.2, ULN2003.15 -> Phase 2 (Orange)
' P6 -> ULN2003.3, ULN2003.14 -> Phase 3 (Brown)
' P7 -> ULN2003.4, ULN2003.13 -> Phase 4 (Yellow)
Any help is appreciated. Thanks in advance