LED Indicating Fuse Box

thingiverse

This is a basic fusebox with LEDs that shows you instantly when a fuse blows. If an LED is lit, the fuse is good. **Quick note about the picture:** I only had one bolt partially in place when I took the picture. It accepts bolts on all four corners without any issues. I got frustrated with poly-fuses often used on 3D printer boards because they are typically undersized and extremely unreliable, blowing even when you're below their rating. Instead, I wanted a fused solution using easy-to-find automotive fuses. The face plate holds the fuses and can be attached to the enclosure using almost any-length M3 bolts. The enclosure is deep enough to allow crimp-on spade connectors without trouble. If you find the enclosure too deep for your needs, simply scale it on the "Z" axis - the screw holes go all the way through nearly to the back. **For schematics, list of materials (BOM), and build instructions, see my blog post here:** http://www.oak600.com/2017/07/22/make-an-indicating-fuse-box/ **IMPORTANT:** I deliberately did not include mounting holes on the enclosure. I personally dislike it when folks include mounting holes because they rarely line up with everything and I end up with either ugly holes or have to spend a lot of time removing them from a model before printing. It is far easier to drill holes (or add them to a model) than it is to remove them. You can easily add holes to the model for your purposes in programs like 123D or online services like TinkerCAD.com. Likewise, you can pick up a drill online or from places like Harbor Freight or $20. I personally love 3M's double-sided permanent adhesive tape for small things like this. I actually used exactly that to mount the box on my 3D printer with great results.