help me in my stepper motor driver

[archiecles123]

i had designed the circuit. can this can this control two stepper motors using parallel port? can u please give a stand alone driver so that i can test the circuit without using parallel port. are there any problems in my circuit?

 

[Reloadron]

It looks like you are coming off pin 1 of the parallel port which is the Strobe. The Data Pins are pins 2 through 9 which are D0 through D7. As to a stand alone circuit to simulate the parallel port? I have no idea. Also, the drawing could be larger making it easier to read. The way you posted it, it is hard to read.

Ron

 

[archiecles123]

will this be ok? stand alone or dumb circuit like the use of 555 timer to control the speed and direction by using switches instead of parallel port. thanks

 

[archiecles123]

ok.. ill use the pins 2 to 9

 

[Reloadron]

You need a 12 VDC power supply. I don't know why the zener is in there. Even if you were using the zener to regulate to 12 V you would need a series resistor in there with the zener diode. Also if the motors each drew just 1 amp you would need at least a 24 watt zener. Get rid of the zener and get a 12 volt supply in there. Stepper motors do not need a fancy well regulated supply. Any decent 12 volt supply that can easily supply the needed current will work.

I don't get your use of pin 10 on the darlington? Pin 10 is common for the free wheeling diode array.

Ron

 

[archiecles123]

pin 10 is where is supply the voltage and the common of the stepper motors are also connected to the supply..
it can also be seen in this link
https://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/

 

[archiecles123]

pin 10 is where i supplied the voltage and the common of the stepper motor is also connected to the supply.. am i right? i can see this in most of the stepper motor driver circuits.. thanks for the help

 

[Reloadron]

I can't get to wordpress sites from my work computer. When I get home from work today I'll check the link and make a few suggestions.

Ron

 

[archiecles123]

thanks man.. very much appreciated

 

[shortbus=]

If you only want to drive the motor without a computer, one of these kits will do it; **broken link removed**
If you Google QK179 many other places sell them or some thing similar. Even Ebay sells them.

 

[archiecles123]

i would like to run it via parallel and also try it without computer using the circuit i made. thanks by the way