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Trouble making motor driver board work ...

PWM motor driver

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#1 DaveFer

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Posted 11 September 2014 - 04:16 AM

Hi all -

 

(Wow ... just as a warning for everyone here:  COPY YOUR WORK before posting in this forum. I just spent about 1/2 researching and writing a post, only to have it be sacrificed to the database gods on posting.)

 

I'm not sure where else to post this item. Any help would be greatly appreciated.

 

I am trying to use this motor driver board:

https://www.bananaro...r-Driver-Module

 

I've attached a picture of the page with documentation on it if that's easier for you.

I have a 9V battery across the motor driver VCC and GND.

 

I have verified that I have PWM running at 100% duty cycle on ShieldBase port 6. I have connected this to IA on the motor driver board. I have tried leaving IB disconnected. Tried connecting IB to Shieldbase GND. Tried connecting IB to an unused Shieldbase digital port. Tried IB to a Shieldbase unused analog port.

EXPECTED RESULT:  Motor goes ACTUAL RESULT:  Nothing

I have tried everything I could think of with no luck. The only think I was successful at was to connect IA directly to the batter GND. RESULT:  The motor whined for a second and then the smoke when out of Channel B of my motor driver board.

Any suggestions would be greatly appreciated.

 

Thank you.

 

   - DaveFer

 

Attached File  motor driver.png   147.61KB   2 downloads



#2 beastyboy

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Posted 11 September 2014 - 05:20 PM

Hi DaveFer,

 

I would return the board and try again.

 

There is not much you can do if it burned out.

 

Not sure how big the motors are that you are driving but there are all sort of bigger driver modules that also have protection onboard.

 

Often these boards are for heavier motors like the ones with the BTS9760B driver chips on on it.

 

Good Luck.

Olaf


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#3 DaveFer

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Posted 11 September 2014 - 08:16 PM

Hi Olaf. Thanks for your comments. 

 

The motor I was attempting to use is a tiny water pump ... something that might be used for a desktop water feature. It fits in the palm of my hand ... I could close my hand around it and you wouldn't see it. But it DOES draw over 0.5A. 

 

I will figure out the exact draw later tonight when I replace the 10A fuse in my multimeter.

 

In the mean time, the vendor saw that I bought 2 of these things from him many months ago and is shipping me a better board right away. I thought that was really good of him.

 

I would find it especially valuable if someone could tell me that I did something wrong PRIOR to letting the smoke out of 1/2 of my motor driver. (I also have another identical 1 that is still intact. So I still have 1.5 of these boards.)

 

If someone could tell me something like, "Well, you need to connect IB to ..." or some other solution.

 

Thanks for your help.







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