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

Sai Saketh Divvela sdivvel at ncsu.edu
Fri Jan 17 02:26:03 CST 2014


Hi all,

I am a graduate student in computer engineering at NCSU ,specializing in
chip design and embedded systems.I have attended last meeting on custom pcb
design conducted by Triembed group at NC state.I found the seminar very
informative and interesting .I would like to know if somebody could present
a seminar on RTOS in embedded systems in future.

Regards,
Sai Saketh



On Fri, Jan 17, 2014 at 1:04 AM, Jon Wolfe <jonjwolfe at yahoo.com> wrote:

> 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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