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

 

[betwixt]

You can replace the 78L05 with a 7805, it's physically bigger and can handle more current but does the same job electrically.

The TE555-1 is NOT the same as a common NE555, it's a completely different device and is not at all compatible.

You might have trouble using this with a disk drive motor. It depends on the motor itself, it has to be a type with four drive inputs which are all connected to coils then combine to a common fifth pin. The common pin would be connected to the 12V supply. Most drive motors are wired in a bridge configuaration where the current is switched between forward and reverse, this design can't do thet.

Brian.

 

[bigdogguru]

The following is an example of a stepper motor tester utilizing a 555 timer and CD4013 flip flops.

Whether or not this design will offer a solution for your requirements depends on the specific type of stepper motor for the reasons previously stated by betwixt.



BigDog