Printer control relay box
prusaprinters
<p>Box for relays and step-down converter for control lights, fans, printer power and more via GPIO.</p><p>I used 12V led strips and fans, so I needed a step-down converter from 24V PSU.</p><p><i>To use a 5V relay with raspberry pi, remove the VCC -> JD-VCC jumper and connect 5V to the JD-VCC pin. Apply 3.3V to the standard VCC input!</i> <strong>Be careful to act at your own risk. I take no responsibility for destroying your device!</strong></p><p> </p><p><strong>Only a qualified person should connect the power cable to the PSU! There is a risk of injury from mains voltage! </strong></p><p> </p><p><strong>Parts</strong>:</p><ul><li>5V four relay board with optocoupler: <a href="https://www.laskarduino.cz/4-kanaly-rele-modul-5vdc-250vac-10a/">https://www.laskarduino.cz/4-kanaly-rele-modul-5vdc-250vac-10a/</a></li><li>Step-down converter 24V → 12V: <a href="https://www.laskarduino.cz/step-down-menic-s-lm2596-s-led-displejem/">https://www.laskarduino.cz/step-down-menic-s-lm2596-s-led-displejem/</a></li><li>Dupont cables for connect with RPi</li><li>1x small zip tie, for hold PSU power cable</li></ul><p><strong>Screws used:</strong></p><ul><li>8x M3x4 plastic for boards</li><li>1x M3x8 for cover locking</li></ul><p> </p><h4>Print Settings</h4><p><strong>Printer: </strong>Prusa I3 MK3S</p><p><strong>Supports: </strong>Only on cover for locking latches.</p><p><strong>Infill: </strong>20%</p><p><strong>Layer height: </strong>0.3mm</p><p><strong>Filament: </strong>Prusament PETG Jet Black</p>
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