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Dc motor control

 
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amsyar



Joined: 15 Mar 2011
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Dc motor control
PostPosted: Tue Mar 15, 2011 10:52 pm     Reply with quote

Hi everyone. Can somebody help me? I have a problem to control DC using PIC16F877A. I know I need to use motor driver. Currently I am using L293D to control the motor. But the problem is I do not know how to connect the Vss and Vs to the microcontroller.
FvM



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PostPosted: Tue Mar 15, 2011 11:59 pm     Reply with quote

Quote:
I do not know how to connect the Vss and Vs to the microcontroller

Vss is the logic supply, in most cases it would be connected to the 5V µC supply. Vs is is the motor supply and will be choosen according to the motor requirements.
amsyar



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PostPosted: Wed Mar 16, 2011 1:02 am     Reply with quote

In Sk40C there are two supply right? Vdd and Vin. Can you tell me which one is connected to Vs and which one connected to Vss.
FvM



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PostPosted: Wed Mar 16, 2011 1:15 am     Reply with quote

I guess, Vdd is the 5V processor supply. You have to find out yourself, if Vin is suitable as motor supply, we can't know.
amsyar



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PostPosted: Wed Mar 16, 2011 2:09 am     Reply with quote

Can you share with me the source code to control DC motor? I am using MPLAB software. I have one more question. Did we need to connect ground to pin number 8 ?
FvM



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PostPosted: Wed Mar 16, 2011 2:30 am     Reply with quote

Pin 8 of L293D? Acording to my datasheet it's Vs (motor supply voltage).
amsyar



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PostPosted: Wed Mar 16, 2011 6:24 am     Reply with quote

I know that we need to connect power supply to pin number 8. but in some datasheet, I found that we need to connect pin 8 to Vs and ground. Is it true
FvM



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PostPosted: Wed Mar 16, 2011 6:47 am     Reply with quote

Quote:
we need to connect pin 8 to Vs and ground

How and?
amsyar



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PostPosted: Wed Mar 16, 2011 7:03 am     Reply with quote

So that's mean we do not need to connect to ground? can you forward the datasheet to me? my email is as below
busyra_amsyar@yahoo.com
thanks for your kindness
gpsmikey



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PostPosted: Wed Mar 16, 2011 12:55 pm     Reply with quote

You need to post a copy of your schematic -- frantically changing wires around is most likely to let the magic smoke out and there is no way to put it back in. To post an image, you need to have the image available on a public server. Then include the url to the image in your post and highlight the image url and click the "Img" button above the posting area. You will end up with the image as part of your post as below (this will date me - an old core memory card !! )



mikey
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temtronic



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PostPosted: Wed Mar 16, 2011 1:51 pm     Reply with quote

I put many of them into PDP-8s a long time ago.....
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