Although it seems simple circuits project sophisticated control of the parallel port is provided with opto 4n26 74LS04 circuits based on the isolated and amplified with IRF1010 MOSFET. L298 motor driver IC (Dual full-bridge driver) do not need to be used to strengthen the circuit datasheet you will see when you examine the file
Computer before making the connection, make sure the connection is good.
L298 Stepper Motor Driver Circuit test
L298 DUAL FULL BRIDGE DRIVER
The L298 is an integrated monolithic circuit in a 15- lead Multiwatt and PowerSO20 packages. It is a high voltage, high current dual full-bridge driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors. operating . supply voltage up to 46 v .total dc current up to 4 a .low saturation voltage .overtemperature protection logical “0” input voltage up to 1.5 v (high noise immunity)