Stepper motor controller with 555

[debasisswan]

Hi,
I am a novice and new in the field. I was looking for a simple circuit to control stepper motors salvaged form old hard Disc Drives. Got the one attached. With a little bit of Googling, I could find out that this 78L05 used here is not exactly common 7805. My question is - Can I replace this 78L05 witha common 7805?
My next question is, the heart of this circuit is a 555-1. Is this the same comon 555 IC? May I replace this 555-1 IC with common 555 IC to build this project?

In case anyone have any other small but easy to build stepper motor controller with simple components, please give me link or share.

Thanks a lot in advance-
Debasis

[pebe]

The 78L05 is the low power version of the 7805 (100mA instead of 1A), so you can replace it with the standard 7805.

I cannot find a data sheet for the TE 55-1, but from the connections if seems to be a driver chip.
It certainly is not the common 555 timer IC.