<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1449495007833_3527" dir="ltr"><br></div><div id="yui_3_16_0_1_1449495007833_3527" dir="ltr">Here are a bunch of h-bridge designs if you are really looking to get the cost down, or maximize cost and power. At a minimum, this page will help you understand h-bridges.</div><div id="yui_3_16_0_1_1449495007833_3527" dir="ltr"><br></div><div id="yui_3_16_0_1_1449495007833_3527" dir="ltr"><span id="yui_3_16_0_1_1449495007833_3537"><a href="http://www.talkingelectronics.com/projects/H-Bridge/H-Bridge-1.html" id="yui_3_16_0_1_1449495007833_3535">H-Bridge</a></span></div><div style="width:450px; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';margin-top:5px; margin-bottom: 5px; background-color: #ffffff;" contenteditable="false" id="enhancrCard_0" class="link-enhancr-attachment link-enhancr-element richcompose-card"><table class="link-enhancr-element" cellspacing="0" cellpadding="0" border="0" style="width:450px; height:170px; position: relative; display: block;" id="yui_3_16_0_1_1449495007833_3658"><tbody id="yui_3_16_0_1_1449495007833_3657"><tr class="link-enhancr-element"><td class="link-enhancr-element" colspan="8" style="height: 1px; background-color: #e5e5e5; font-size: 1px; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 1px; background-color: #e5e5e5; font-size: 1px; line-height:0px;"> </div></td></tr><tr class="link-enhancr-element" id="yui_3_16_0_1_1449495007833_3670"><td rowspan="5" class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td><td class="link-enhancr-element link-enhancr-image-wrap enhancr-image-crop" rowspan="5" style="vertical-align: middle; width: 168px; height: 168px; border-collapse: collapse; background-color: rgb(255, 255, 255);" id="yui_3_16_0_1_1449495007833_3674"><div class="link-enhancr-element" style="width: 168px;" align="center" id="yui_3_16_0_1_1449495007833_3673"><a href="http://www.talkingelectronics.com/projects/H-Bridge/H-Bridge-1.html" class="link-enhancr-card-urlWrapper link-enhancr-element" style="text-decoration: none !important;text-decoration:none; color: #000000 !important;" id="yui_3_16_0_1_1449495007833_3672"><img alt="image" src="https://s.yimg.com/vv//api/res/1.2/Z3XKZT013JryvQltmamyYg--/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MTY4O3c9MTY4/http://www.talkingelectronics.com/projects/H-Bridge/images/Design21.gif.cf.jpg" class="link-enhancr-thumbnail-image link-enhancr-element yahoo-ignore-inline-image" width="168" height="168" style="display: block; margin: auto;" data-id="80aae2bf-cb77-3583-0844-33f139d4df62" id="yui_3_16_0_1_1449495007833_3671"></a></div></td><td rowspan="5" class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td><td rowspan="5" class="link-enhancr-element" style="width: 14px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;" id="yui_3_16_0_1_1449495007833_3669"><div class="link-enhancr-element" style="width: 14px; background-color: #ffffff; font-size: 14pt;"> </div></td><td colspan="2" class="link-enhancr-element" style="height: 6px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 6px; background-color: #ffffff; font-size: 6pt;"> </div></td><td rowspan="5" class="link-enhancr-element" style="width: 20px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="width: 20px; background-color: #ffffff; font-size: 20pt;"> </div></td><td class="link-enhancr-element" rowspan="5" width="1" style="width: 1px; background-color: #e5e5e5; font-size: 1pt; border-collapse: collapse;" id="yui_3_16_0_1_1449495007833_3851"><div class="link-enhancr-element" style="width: 1px; background-color: #e5e5e5; font-size: 1pt;"> </div></td></tr><tr id="yui_3_16_0_1_1449495007833_3656"><td class="link-enhancr-element" colspan="2" style="width: 100%; vertical-align: middle; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';" id="yui_3_16_0_1_1449495007833_3655"><div class="link-enhancr-text-part link-enhancr-element" style="line-height:16.5px; background-color: #ffffff; height: 135px; width: 245px;" id="yui_3_16_0_1_1449495007833_3654"><div class="link-enhancr-element" style="word-wrap: break-word; word-break: break-all;" id="yui_3_16_0_1_1449495007833_3653"><span class="link-enhancr-element icon icon-shrink link-enhancr-toggle" id="yui_3_16_0_1_1449495007833_3659"></span><span class="link-enhancr-element icon icon-close link-enhancr-delete" id="yui_3_16_0_1_1449495007833_3652"></span><a href="http://www.talkingelectronics.com/projects/H-Bridge/H-Bridge-1.html" class="link-enhancr-card-urlWrapper link-enhancr-element" style="text-decoration: none !important;text-decoration:none; color: #000000 !important; line-height: 100%; font-size: 18px; display: block;"><span class="link-enhancr-element link-enhancr-card-title" style="margin: 0; font-weight: normal;margin-bottom: 3px; font-size: 18px; line-height: 21px; max-height: 43px; color: #000000; overflow: hidden !important; display: inline-block;">H-Bridge</span></a><div style="font-size: 13px; line-height: 20px; color: #999999; max-height: 81px; font-family: 'Georgia', 'Times', 'Times New Roman', 'serif';overflow: hidden;" class="link-enhancr-card-description link-enhancr-element" id="yui_3_16_0_1_1449495007833_3660">THE H-BRIDGE Home
The H-Bridge is designed to drive a motor clockwise and anticlockwise. </div></div></div></td></tr><tr id="yui_3_16_0_1_1449495007833_3663"><td colspan="2" class="link-enhancr-element" style="height: 4px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;" id="yui_3_16_0_1_1449495007833_3662"><div class="link-enhancr-element" style="height: 4px; background-color: #ffffff; font-size: 4pt;" id="yui_3_16_0_1_1449495007833_3661"></div></td></tr><tr id="yui_3_16_0_1_1449495007833_3668"><td class="link-enhancr-element" style="vertical-align: middle; font-family: 'Arial', 'Helvetica Neue', 'Helvetica', 'sans-serif';" id="yui_3_16_0_1_1449495007833_3667"><div class="link-enhancr-element" style="font-size: 0pt;" id="yui_3_16_0_1_1449495007833_3666"><a href="http://www.talkingelectronics.com/projects/H-Bridge/H-Bridge-1.html" class="link-enhancr-card-url link-enhancr-element" style="color: black; text-decoration: none !important;text-decoration:none;cursor:pointer !important;" target="_blank" id="yui_3_16_0_1_1449495007833_3665"><span class="link-enhancr-element link-enhancr-view-on" style="display: inline-block; line-height: 11px; max-width: 145px; min-width: 85px; overflow: hidden; max-height: 13px; word-break: break-all;" id="yui_3_16_0_1_1449495007833_3556"><span class="link-enhancr-element link-enhancr-mobile-no-resize" style="vertical-align:middle; font-size: 9px; line-height: 11px; color: #999999; -moz-text-size-adjust: none; -ms-text-size-adjust: none; -webkit-text-size-adjust:none; text-size-adjust:none;" id="yui_3_16_0_1_1449495007833_3664">View on <span style="font-weight: bold" class="link-enhancr-view-on-domain">www.talkingelectroni...</span></span></span></a></div></td><td class="link-enhancr-element" style="vertical-align: middle; width: 100px; font-family: 'Arial', 'Helvetica Neue', 'Helvetica', 'sans-serif';"><div class="link-enhancr-element link-enhancr-preview-wrapper" style="max-width: 100px; min-width: 80px; overflow: hidden; text-align: right; line-height: 11px; max-height: 13px; font-size: 0pt;"><span class="link-enhancr-element link-enhancr-preview-by link-enhancr-mobile-no-resize" style="vertical-align:middle; font-size: 9px; line-height: 11px; color: #999999; -moz-text-size-adjust: none; -ms-text-size-adjust: none; -webkit-text-size-adjust:none; text-size-adjust:none;">Preview by Yahoo</span></div></td></tr><tr><td colspan="2" class="link-enhancr-element" style="height: 9px; background-color: #ffffff; font-size: 0pt; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 9px; background-color: #ffffff; font-size: 9pt;"></div></td></tr><tr class="link-enhancr-element"><td class="link-enhancr-element" colspan="8" style="height: 1px; background-color: #e5e5e5; font-size: 1px; border-collapse: collapse;"><div class="link-enhancr-element" style="height: 1px; background-color: #e5e5e5; font-size: 1px; line-height:0px"> </div></td></tr></tbody></table></div><div id="yui_3_16_0_1_1449495007833_3527"><br></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Saturday, December 5, 2015 10:41 AM, Grawburg via TriEmbed <triembed@triembed.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv8489789422"><div><div class="yiv8489789422iw_mail" dir="LTR" style="font-family:Times New Roman, Times, Serif;font-size:16px;">I think using an H-Bridge (there is a board for the Pi) is the route I'm going to take, primarily because it introduces me to something new.<br clear="none">Since I'm already using an I/O port expander I've got plenty of GPIO pins and a little extra isolation.<br clear="none">Thanks to everyone's input. Using a couple of relays is being filed away for another project.<br clear="none"><br clear="none">Much appreciation,<br clear="none"><br clear="none">Brian Grawburg<br clear="none"><br clear="none">BTW: Which e-mail protocol is favored: Original comment first followed by answer/response, or as I have it here?<br clear="none"><br clear="none"><blockquote class="yiv8489789422reply_block" dir="LTR" style="border-left:2px solid blue;margin-left:1em;padding-left:1em;font-size:13px;font-family:tahoma, helvetica, sans-serif;"><div class="yiv8489789422yqt1734094262" id="yiv8489789422yqtfd15449"><hr size="1">-----Original Message-----<br clear="none">From: "Rick via TriEmbed" <triembed@triembed.org><br clear="none">Subject: Re: [TriEmbed] Circuit Help<br clear="none"><br clear="none">
</div></blockquote></div></div><div class="yiv8489789422yqt1734094262" id="yiv8489789422yqtfd60660"><title></title><div>
Good evening Brian,<br clear="none"><br clear="none">I think you'll find an H-Bridge to be the best solution from an availability standpoint (used to drive stepper motors and DC brushed/brushless motors), the inherent lockout design (keeps you from shorting your supply bus), and the isolation necessary between your 12 volt power supply and your controller circuitry. Oh, did I mention the good H-Bridges limit current?<br clear="none"><br clear="none">
</div></div></div><br><div class="yqt1734094262" id="yqtfd17947">_______________________________________________<br clear="none">Triangle, NC Embedded Computing mailing list<br clear="none"><a shape="rect" ymailto="mailto:TriEmbed@triembed.org" href="mailto:TriEmbed@triembed.org">TriEmbed@triembed.org</a><br clear="none"><a shape="rect" href="http://mail.triembed.org/mailman/listinfo/triembed_triembed.org" target="_blank">http://mail.triembed.org/mailman/listinfo/triembed_triembed.org</a><br clear="none">TriEmbed web site: <a shape="rect" href="http://triembed.org/" target="_blank">http://TriEmbed.org</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>