DIY Cheap Lab Power Supply 5A/30V

prusaprinters

<p>Easy to build lab power supply from cheap eBay parts.</p><p>What you will need:</p><ul><li>Power Supply unit: <a href="https://www.ebay.com/sch/i.html?_from=R40&amp;_nkw=Adjustable+5A+Step-Down+Buck+LCD+Digital+Power+Supply+Module&amp;_sacat=0">eBay Search</a></li><li>Spare laptop power supply (I use one with 19.5V DC / 4.9A)</li><li>Some black/red/yellow wires (from old PC power supply)</li><li>Female banana panel plugs: <a href="https://www.ebay.com/sch/i.html?_from=R40&amp;_nkw=4mm+Banana+plug+Jack+socket+Female&amp;_sacat=0">eBay Search</a></li><li>On/off panel switch: <a href="https://www.ebay.com/sch/i.html?_odkw=power+switch&amp;LH_BIN=1&amp;_osacat=0&amp;_from=R40&amp;_nkw=rocker+switch&amp;_sacat=0">eBay Search</a></li><li>4pcs 3x15mm countersink self-threading screws.</li><li>Printed case (this model).</li><li>Solder iron.</li></ul><p><strong>Note:</strong> Max. output voltage is limited to input voltage - 0.5V. Using the suggested laptop power supply will give a max. output of 19V.</p><p>Great for metal plating as it has the fine control for current needed for best result.</p><p>Follow photos for assembly.</p><p>Model shown is printed in Devil Design grey PET.</p><p><strong>Updates</strong><br><strong>2021.01.29:</strong> Added model with ventilation slots for high power modules.</p><p><i><strong>&gt;&gt; If you like it, please leave a rating, a like or maybe a donation :)</strong></i></p><h3>Print Settings</h3><ul><li>0.20mm layer height, 15% infill</li><li>2 perimeters, 3 top and 2 bottom layers</li><li>No support or elephant foot compensation needed</li></ul>