[TriEmbed] [OBSOLETE trianglearduino:1093] Favorite H-Bridge chip

[Jon Wolfe]

Pololu.com has some really nice h-bridge and stepper driver breakout boards. They're more than breakouts, a lot of them have all the needed support components and current limit pots. 






________________________________
 From: Rodney Radford <ncgadgetry at gmail.com>
To: Charles West <crwest at ncsu.edu> 
Cc: TriEmbed <triembed at triembed.org> 
Sent: Thursday, January 16, 2014 6:31 PM
Subject: Re: [TriEmbed] [OBSOLETE trianglearduino:1093] Favorite H-Bridge	chip
 


I see a lot of them listed for sale, but I don't see the specs on 
them anywhere other than the data item that the helicopter battery is a 
3.7v 150mAh battery, so they are probably 3v max power.   I would 
recommend waiting until they arrive and then test them to determine the 
current for them under load so you have decent specs for the H-bridge.

But I do agree it should not take too much to control them.




On Thu, Jan 16, 2014 at 6:11 PM, Charles West <crwest at ncsu.edu> wrote:

Hey Rodney,
>
>
>I'm hoping to use eight of these:
>cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=111154620711
>
>
I'm not quite sure of the specs yet, because I haven't gotten the data 
sheet yet.  However, the motors only weight 3 grams each (and I don't 
think we will be running them at full power), so I don't think the 
amperage will be that high.  Its for the Astropresence drone and we'll 
probably be trying to run it in a neutral buoyancy tank.
>
>Just one to start with, but we are hoping to present the 
project at the SpaceVision conference (and pitch the idea again to a few people).  If there is interest in the project, we'll probably be 
iterating the design several times.
>
>
>
>Thanks,
>Charlie
>
>
>
>
>On Thu, Jan 16, 2014 at 5:27 PM, Rodney Radford <ncgadgetry at gmail.com> wrote:
>
>What are the specs of the motors you plan to drive - voltage and current - as that will partially limit the choices.
>>
>>Also do you have any preferences on form factor for the IC - through hole, SMT, etc?
>>
>>And how many do you plan to build - just one, or are you planning to make several?
>>
>>
>>
>>
>>On Thu, Jan 16, 2014 at 5:25 PM, Charles West <crwest at ncsu.edu> wrote:
>>
>>Hello,
>>>
>>>I'm working on a project where I need to get bi-directional control on 8 
small dc motors.  In the past I've just made H-bridges from discrete 
Darlington transistors, but I think that that would be too bulky for 
this project.  However, I'm not quite sure what chips would be best to 
use.
>>>
>>>These (and similar) chips seem popular:
>>>https://www.sparkfun.com/products/315
>>>
>>>
>>>If I may ask, is that what you use or is there some other chip that you prefer?
>>>
>>>
>>>Thanks,
>>>
>>>Charlie West
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>>
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