Hanging, Sliding Raspi Camera Adds Dimension To Octoprint

Are you using Octoprint yet? It’s so much more than just a way to control your printer over the internet, or to keep tabs on it over webcam when you’re off at work or fetching a beer. The 3D printing community has rallied around Octoprint, creating all sorts of handy plug-ins like Octolapse, which lets you watch the print blossom from the bed via time-lapse video.

Hackaday alum [Jeremy S Cook] wanted to devise a 3D-printable mount for a Raspi camera after finding himself inspired by [Tom Nardi]’s excellent coverage of Octoprint and Octolapse. He recently bought a wire shelving unit to store his printer and printer accessories, and set to work. We love the design he came up with, which uses the flexibility of the coolant hose to provide an endlessly configurable camera arm. But wait, there’s more! Since [Jeremy] mounted it to the rack with zip ties, the whole rig shimmies back and forth, providing a bonus axis for even more camera views. Slide past the break to see [Jeremy]’s build/demo video.

It’s great to be able to monitor a print from anywhere with internet access, but the camera is almost always set up for a tight shot on the print bed. How would you ever know if you’re about to run out of filament? For that, you need a fila-meter.

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CIPODS: Earbuds For Cochlear Implants

If you wear cochlear implants, sound doesn’t enter through your ear, but rather from microphones above your ears. That means earbuds are useless and you have to resort to large and clumsy over the ear headphones. [Mjcraig23] wanted the convenience of earbuds and set out to do what we all do: hack it.

The result is handily portable as you can see in the video, below. The trick is that he used replacement battery covers and then grafted earbud holders (called EARBUDi) to them using one of our favorite fasteners, zip ties. Apparently, you can wire a cable directly into the device, but then you lose the ability to hear what’s going on around you, which would not be a good idea for catching some tunes while walking your dog or other common earbud use cases.

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How To Zip, Stick, And Screw Stuff Together

One of the first problems every new hacker/maker must solve is this: What’s the best way to attach part “A” to part “B”. We all have our go-to solutions. Hot glue, duck tape ( “duct tape” if you prefer) or maybe even zip ties. Super glue, epoxy, and if we’re feeling extra MacGyver-ish then it’s time for some bubble gum. For some Hackaday readers, this stuff will seem like old hat, but for a beginner it can be a source of much frustration. Even well versed hackers might pick up a few handy tips and tricks presented in this video after the break.

In part one of this series, [Ben Krasnow] shows us the proper use of just a few of the tools and techniques he uses in his shop. [Ben] starts out with a zip-tie tool which he loves in part because of a tension setting that ensures it’s tight but not overly. He moves on to advice for adhesive-vs-material and some tips on using threaded fasteners in several different circumstances. He also included a list of the parts and tools he uses so you don’t have to go hunting them down.

[Ben] is no stranger to us here at Hackaday. He does some epic science video. You can subscribe to his channel or follow his blog if you enjoy what you see.

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Electric Bicycle Hack Is Hilariously Simple

Necessity may be the mother of invention, but limited resources give birth to some of the best hacks. [joejoeboom’s] 5-minute electric bike conversion probably can’t drive you into the next town, but it can scoot you around your neighborhood.

[jojoeboom] found a cordless drill at a local hardware store for $15, which he simply zip-tied to the bicycle’s frame. He positioned the drill so the chuck pressed firmly against the side of the bicycle’s rear wheel, creating a simple friction drive system. To create a throttle, [joejoeboom] strapped a spare hand brake to the handlebar and wrapped the brake’s cable around the drill’s trigger. Several carefully placed zip ties hold everything in place and allow the cable to tug at the trigger when the hand brake is squeezed.

Watch the bike poking around in a video below, and for some extreme contrast check out the 102-mph bicycle build from earlier this summer.

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Roll Your Own Capacitors – High Voltage Edition

[Grenadier] tipped us off about his method for building your own high-voltage capacitors. He thought the paper and foil capacitor project was a nice introduction to the concepts, but at the same time he knew he could produce a much more powerful device.

For the dielectric he is using acetate film. This is the material from which overhead transparency sheets are made. He stuck with aluminum foil for the two plates. Just roll the foil flat with a rolling-pin, use thin wire to minimize the air that will be trapped between the dielectric layers, and make sure the foil plates are at least 4cm shorter than the acetate film on each end to prevent leakage. After rolling and securing the capacitor with zip ties you’ll be ready for the 3nF worth of fun seen in the video after the break. [Grenadier] mentions that this can be improved further if you were to vacuum impregnate the device with beeswax.

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