Block with power input and switch

prusaprinters

<p>I designed this around an old external HD adapter that has dual output (12V/5V) on a DIN-422 4-pin connector. I only needed 12V so only <strong>one</strong> circuit can be wired in - there isn't enough room for 4 leads in there, it's very tight.</p><p>The bracket is made for square section 10mm bars. My use case is on a <a href="https://www.amazon.ca/gp/product/B07WHFFJZP/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&amp;psc=1">desktop articulated arm</a> for a soldering exhaust fan. I had to disassemble the bar and slide the bracket on, it's not meant to be unclipped as there is no flex.</p><p>This block requires specific parts:</p><ul><li><a href="https://addison-electronique.com/en/products/parts-components/switch-parts-components/rocker-switch/rocker-switch-on-off-2pins-spst-10a-125v-8a-250vac/">2-pin rocker switch</a> (it can be found with model# <i>MRS-2-101A-2</i> elsewhere)<ul><li>the plastic isolating flange on the empty side needs to be trimmed off</li></ul></li><li><a href="https://www.amazon.ca/gp/product/B0839239SG/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&amp;psc=1&amp;language=en_CA">4-pin DIN-422 module for PCB</a><ul><li>all the unneeded pins for PCB surface mounting have to be clipped off</li></ul></li></ul><p>Printed with PLA, these parts are interference fit and won't come out without destroying the print.</p><p>You need to solder your wires in a specific order:</p><ol><li>Pass pos. wire from device through the circular opening to switch pin and solder</li><li>Solder pos. wire (short, maybe 6-7cm) on other switch pin</li><li>Pass pos. wire from switch through connector opening</li><li>Push switch into place making sure pos. wire is routed properly</li><li>Pass neg. wire from device side all the way through the block</li><li>Shorten pos. wire on connector side as much as possible and solder to connector (see picture)</li><li>Solder neg. wire to connector</li><li>Push connector in place</li></ol><p>The pos. wire on the connector has to be as short as possible so it doesn't kink badly when you push the connector into place.</p><p>If for some reason the DIN-422 connector doesn't seat completely to the bottom and you are unable to use the cover plate with screws, you can use the alternate that is thinner. It's a friction fit and works fine.</p>