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  <div class="section" id="step-down-power-supply">
<span id="id1"></span><h1>Step-Down Power Supply<a class="headerlink" href="#step-down-power-supply" title="Permalink to this headline">¶</a></h1>
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               "Power_Supplies/powersupply11_tilted_600.jpg",
               "Step-Down Power Supply")
}}
{{
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             "Power_Supplies/powersupply11_caption_600.jpg",
             "Step-Down Power Supply with caption")
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{{
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             "Step-Down Power Supply")
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             "Step-Down Power Supply with connectors")
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{{
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             "Outline and drilling plan")
}}
{{ tfdocend() }}<div class="section" id="features">
<h2>Features<a class="headerlink" href="#features" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>Powers a stack of Bricks with 5V</li>
<li>Can power motors of driver Bricks (e.g. DC Brick)</li>
<li>Input voltage 6V to 27V DC</li>
<li>Additional output voltage 5V (since hardware version 1.1)</li>
</ul>
</div>
<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The Step-Down Power Supply can be used to power a <a class="reference internal" href="../../Primer.html#primer-stack"><em>stack</em></a>
of <a class="reference internal" href="../../Primer.html#primer-bricks"><em>Bricks</em></a> and <a class="reference internal" href="../../Primer.html#primer-bricklets"><em>Bricklets</em></a>.
It is equipped with an efficient step-down controller and can be plugged in
at the bottom of the stack where it provides the 5V needed for Bricks and
Bricklets. In addition it feeds the external voltage into the stack power signals.
It is not absolutely necessary if you only want to use a single Brick.
But is intended to be used with stacks.</p>
<p>There are several possible applications. The Step-Down Power Supply allows
to create stacks powered by batteries. These stacks can then communicate
cable based or wireless with the help of Master Extensions.
Also, the Step-Down Power Supply can be used to power DC motors, servos or
stepper motors (over the stack power signals with up to 27V DC) without the need
to connect external power sources to the corresponding Bricks. It is also
possible to use the Step-Down Power Supply in cases where huge stacks of Bricks
with many Bricklets are needed and the maximum current of 500mA given over the
USB port is not sufficient.</p>
<p>The possible input voltage range is 6V to 27V DC. A
<a class="reference internal" href="../Bricks/Master_Brick.html#master-brick"><em>Master Brick</em></a> can measure the current consumption of the
stack and the voltage of the external power source. Currents below 200mA can
not be measured satisfactorily.</p>
</div>
<div class="section" id="technical-specifications">
<h2>Technical Specifications<a class="headerlink" href="#technical-specifications" title="Permalink to this headline">¶</a></h2>
<table border="1" class="docutils">
<colgroup>
<col width="35%" />
<col width="65%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Property</th>
<th class="head">Value</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>Current Consumption</td>
<td>20-30mA, depending on Input Voltage</td>
</tr>
<tr class="row-odd"><td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-even"><td>Minimum/Maximum Input Voltage</td>
<td>6V/27V DC</td>
</tr>
<tr class="row-odd"><td>Maximum Output Current</td>
<td><div class="first last line-block">
<div class="line">5V Supply: 3A</div>
<div class="line">Transit for Driver Bricks: 5A</div>
</div>
</td>
</tr>
<tr class="row-even"><td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-odd"><td>Dimensions (W x D x H)</td>
<td>40 x 40 x 16mm (1.57 x 1.57 x 0.63&quot;)</td>
</tr>
<tr class="row-even"><td>Weight</td>
<td>14g</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="resources">
<h2>Resources<a class="headerlink" href="#resources" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>Schematic (<a class="reference external" href="https://github.com/Tinkerforge/step-down-powersupply/raw/master/hardware/step-down-schematic.pdf">Download</a>)</li>
<li>Outline and drilling plan (<a class="reference external" href="../../_images/Dimensions/step_down_powersupply_dimensions.png">Download</a>)</li>
<li>Project design files (<a class="reference external" href="https://github.com/Tinkerforge/step-down-powersupply/zipball/master">Download</a>)</li>
</ul>
</div>
<div class="section" id="connectivity">
<h2>Connectivity<a class="headerlink" href="#connectivity" title="Permalink to this headline">¶</a></h2>
<p>The following picture depicts the different connection possibilities of the
Step-Down Power Supply.</p>
<a class="reference external image-reference" href="../../_images/Power_Supplies/powersupply11_caption_800.jpg"><img alt="Step-Down Power Supply with caption" class="align-center" src="../../_images/powersupply11_caption_600.jpg" style="width: 600.0px; height: 451.0px;" /></a>
</div>
</div>


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