DataSheets

stepper motors:

ID35 35014 stepping motor

common:

74LS125 Quad 3-State Buffer (ICs 1 - 2)
74LS04 Hex Inverting Gates (IC3)
74LS123 Retriggerable Monostable Multivibrator (IC4)
74LS366 Hex Inverter/Buffer 3-State (IC5)
74LS138 1-OF-8 DECODER/DEMULTIPLEXER (IC6)
74LS175 Quad D Flip Flops (ICs 7 - 12)
7805 Voltage Regulator

single-interface models only:

ULN2003A Darlington Driver Arrays (ICs 13 - 16)
ECG2013 (ULN2003 equivalent)

prototype models (driver board) only:

CD4551 Quad 2-Input Analogue Multiplexer / Demultiplexer (IC1)
CD4013 Dual D Type Flip Flops (IC2)
CD4070 Quad 2 Input Exclusive Or Gate (IC3)
CD40109 CMOS Quad Low-to-High Voltage Level Shifter (IC4)
VQ1000CS 4-N Channel 60-V MOSFET (IC5)
555 Single Timer (IC6)

miscellaneous:

74HC4050 Hex Buffers - Non Inverting