<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt">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. <br><br><br><div><span><br></span></div><div><br></div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 10pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Rodney Radford <ncgadgetry@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Charles West <crwest@ncsu.edu> <br><b><span style="font-weight: bold;">Cc:</span></b> TriEmbed
<triembed@triembed.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, January 16, 2014 6:31 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [TriEmbed] [OBSOLETE trianglearduino:1093] Favorite H-Bridge chip<br> </font> </div> <div class="y_msg_container"><br><div id="yiv0094120253"><div><div dir="ltr"><div>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.<br clear="none"><br clear="none"></div>But I do agree it should not take too much to control them.<br clear="none"><div class="yiv0094120253gmail_extra"><br clear="none"><br clear="none"><div class="yiv0094120253gmail_quote">On Thu, Jan 16, 2014 at 6:11 PM, Charles West <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:crwest@ncsu.edu" target="_blank" href="mailto:crwest@ncsu.edu">crwest@ncsu.edu</a>></span> wrote:<br clear="none">
<blockquote class="yiv0094120253gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div class="yiv0094120253yqt5903765886" id="yiv0094120253yqt89916"><div dir="ltr"><div><div>Hey Rodney,<br clear="none"></div><div><br clear="none">I'm hoping to use eight of these:<br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=111154620711">cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=111154620711</a><br clear="none">
<br clear="none"></div>
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.<br clear="none">
<br clear="none"></div>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.<br clear="none">
<div class="yiv0094120253gmail_extra"><br clear="none"></div><div class="yiv0094120253gmail_extra">Thanks,<br clear="none">Charlie<br clear="none"></div><div><div class="yiv0094120253h5"><div class="yiv0094120253gmail_extra"><br clear="none"><br clear="none"><div class="yiv0094120253gmail_quote">On Thu, Jan 16, 2014 at 5:27 PM, Rodney Radford <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:ncgadgetry@gmail.com" target="_blank" href="mailto:ncgadgetry@gmail.com">ncgadgetry@gmail.com</a>></span> wrote:<br clear="none">
<blockquote class="yiv0094120253gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div dir="ltr"><div><div>What are the specs of the motors you plan to drive - voltage and current - as that will partially limit the choices.<br clear="none">
<br clear="none"></div>Also do you have any preferences on form factor for the IC - through hole, SMT, etc?<br clear="none">
<br clear="none"></div>And how many do you plan to build - just one, or are you planning to make several?<br clear="none"></div><div class="yiv0094120253gmail_extra"><br clear="none"><br clear="none"><div class="yiv0094120253gmail_quote"><div><div>On Thu, Jan 16, 2014 at 5:25 PM, Charles West <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:crwest@ncsu.edu" target="_blank" href="mailto:crwest@ncsu.edu">crwest@ncsu.edu</a>></span> wrote:<br clear="none">
</div></div><blockquote class="yiv0094120253gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div><div><div dir="ltr"><div><div>Hello,<br clear="none"><br clear="none"></div>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.<br clear="none">
<br clear="none">These (and similar) chips seem popular:<br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="https://www.sparkfun.com/products/315">https://www.sparkfun.com/products/315</a><br clear="none"><br clear="none"></div><div>If I may ask, is that what you use or is there some other chip that you prefer?<br clear="none">
<br clear="none"></div><div>Thanks,<br clear="none"></div><div>Charlie West<span><font color="#888888"><br clear="none"></font></span></div></div></div></div><span><font color="#888888">
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