Prusa Mini Toggle Switch and USB on Display

thingiverse

2021.08.07 UPDATE - I've created a better version of this with a separate switchbox that bolts onto a bracket. This allows the switchbox to be offset backwards. The first version was all one piece, but had to be far forward so it could print flat. I've also created a switchbox with a rectangular cutout that should work for smaller rocker switches. Included also are the Blender files if you need to resize the hole for the switch you have. Remix of 4nthonylin's Prusa Mini Display Back Cover (www.prusaprinters.org/prints/36645-prusa-mini-displaybox-cover-w-usb) to include a switchbox for a toggle switch, and an optional holder for a USB extension cable. The Mini is great within its own constraints, but the location of the power switch and USB input are a little inconvenient. CAUTION: Install this modification at your own risk. I will provide links for what I used, but I am not an electrician and cannot guarantee the mod's safety. If you install this incorrectly, or even if you do install it correctly but I pointed you to the wrong materials, there is a risk of shorting out your board and/or causing a fire. This is a pretty straightforward modification, but it does require cutting or melting a slot or hole in the side of the motherboard's containment box to provide an exit for the added power wires. Alternately, removing the original switch leaves a rectangular opening through which you can pass the wires. Materials needed: x4 M3x12mm bolts to replace the 4 shorter OEM bolts that hold the display board in its casing x1 Toggle switch of appropriate rating, with a 12.5mm (0.5in) threaded post. I used this one: www.amazon.com/gp/product/B000GTMUUI x2 Female Spade connector appropriately sized for the toggle switch you buy (the linked switch uses 6.37mm (0.25in) connectors) x2 Female Spade Connector 4.8mm (0.189in) to attach to the Mini's board x2 lengths of 12g-19g high-temp braided copper wire (I used 14g because the local hardware store had it by the foot), about 50cm (20in) each will give plenty of slack to run them along the under-bed rail. If using v2: x2 Bolts #6-32 x 0.5in and x2 nuts to attach the switchbox to the bracket on the display (which is the size I had on hand, but similarly sized M3 x 12mm bolts should work). For optional USB extension: x1 USB extension cable (Up bend, 50cm length) www.ebay.com/itm/233628431217 x2 Bolts #6-32 x 1in (which is what I had on hand, though a similarly sized M3 x 25mm bolts should work) and x2 nuts to attach the USB block I also used x2 adhesive cable tie mounts like these www.ebay.com/itm/142847677858 with the adhesive pad removed and attached to the side of the under-bed rail with T-Nuts for cable management x2 M5 T-Nuts www.thingiverse.com/thing:3663001 to secure the cable tie mounts x2 M5x10mm bolts to secure the cable tie mounts