🇺🇸 · Workshop 88 · D. Scott Williamson
For over a decade, I’ve wanted to attach an action camera to my bicycle helmet to make time lapse and long form videos. Now that I’ve worked out many of the kinks you can check out the cool results on my HYPERBIKE YouTube channel. In 2017 I attached a 3D printed PLA GoPro HERO 3+ mount to my bicycle helmet (the same helmet, sans stickers) but it had some serious problems. The footage was too jittery to use, video stabilization was not as advanced or as available as it is today. More seriously, I attached the mount to the helmet with a bolt that actually touched the top of my head. If I had an accident it could have caused serious injury. Fast forward nine years, I designed a GoPro compatible base designed to be 3D printed from flexible TPU filament and safely zip-tied to my helmet between the forward vents. The camera holder is an adaptation of https://www.thingiverse.com/thing:6978330 . The GoPro HERO 4K has a 165° lens so I removed some material from the interior corners of the holder around the neutral density (“ND”) filter for a better field of view (“FOV”) reducing corner vignettes from the holder. When 3D printing flexible filaments, I find it beneficial to remove as much friction from the feed mechanism as possible. The easiest way I found to do this is to mount the spool on a paint roller clamped to a nearby shelf. The paint roller has smooth rolling bearings and the fuzzy roller holds the spool securely. This works so well I need to be careful not to pull the filament too quickly because the weight of sagging filament is enough to cause the whole spool to unroll. I still like to use the TPU settings from this older video from Angus at Makers Muse , one of many awesome design and 3D printing YouTube channels. I could probably print a little faster but I like the quality and rarely need to shave minutes off a print time of a few hours. I’m really happy with how well I’ve tuned the support settings to be functional yet removable, a challenge with a tough filament like TPU. I use this same GoPro HERO 4K camera holder for my 5″ quads so I know it works well and can stand up to a beating. This camera mount, being flexible, has a fair amount of bounce and wiggle, but the modern GoPro HERO 4K has a built in gyro and embeds the motion data in the video files. I use Gyroflow to join and stabilize my videos with beautiful results. I took it out for a few bike rides and it worked great but there was a LOT of wind noise. I never noticed wind noise in the drone footage because the quads are so loud, but on a bicycle with dialog, the intermittent loud roaring was far from ideal. The camera microphones need a “wind guard”, also known as a “muff”, or “dead cat”. These are the furry covers you always see on microphones to diffuse air energy before it gets picked up. They’re affordable and available, but I didn’t want to wait for shipping, so inspired in part by this guy , I searched all over the house for something sufficiently sacrificial, furry, and immediately available. I found a whole bag of these little cat toys so I hot glued some cool looking black ones to the 3D printed camera holder. The GoPro has two microphones, one on top and one in front right under the lens. Now my camera looks like Bert from Sesame Street with a goatee. I needed to carefully trim the lower muff so it was not visible from the camera. The cat toy dead cat works great. Ideally maybe something with longer fur that is a collection of different lengths like the commercial options may be an improvement but this is what I had and I’m really happy with it. This was a quick cheap effective hack that’s still working for me. What will you make next? Workshop 88 makerspace is sponsored by Comparion Insurance . Local agents who know insurance inside and out, able to easily guide clients through the complex process of finding policies to match their unique needs. Benefits: The right coverage at the right price Insurance options from a wide variety of carriers A local expert looking out for their exact needs Use the QR code or this link get a no-commitment insurance quote and save money today: https://www.comparioninsurance.com/workshop-88… The post Hack a Dead Cat Muff From a Fuzzy Cat Toy first appeared on Workshop88 .
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