This two-piece floating rotor for bicycles improves braking performance + increases service life considerably

Posted on 21/04/2022 by Gaurav Sood

Heat degradation can wear down the rotors on a bicycle, thereby adversely affecting the disks and the overall braking performance too. Also, the brake pads create abnormal noises due to this problem as the disk continues to rub against the brake pad. This all is attributed to the rotors wrapping in different amounts while braking. Most modern bicycles have hydraulic disc brakes as the standard which can cause such issues and a Taiwanese company wants to eliminate the evident issue with its innovative Two-Piece 3D Floating Rotor.

Obviously, a rider cannot control the overheating or deformation inherent to the hydraulic disks as rotors currently available on the market don’t spring back to position once they cool down. The new rotor design by PSB wants to address this problem with its elastic and floating outer disk. There are spring rivets on the back of the rotor that create insulation between the outer and inner discs which ultimately prevent deformation. The cuts on the 6^th and 12^th ribs bring elastic function that further aids in achieving the intended result.

Designer: PSB

When the rider brakes, the angle cuts provide support as the margin space reaches the threshold and doesn’t affect the disc strength. This gives the disc ample space to move freely and deform – in fact about 85% larger than currently used floating rotors. According to PSB, this design brings a 1.8mm thick rotor at par with a 2.0mm rotor. As a result of all this, the uneven clamping can also be avoided to bring top braking performance to the fore. Overall, the service life of the bicycle is hugely improved with this invention. An additional bonus is the application of this rotor design equally well for electric bicycles, making it a commercially viable solution.

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Ben Heck builds Arduino-based automatic sunglasses, beats David Caruso to the punch (video)

Posted on 09/10/2012 by Jon Fingas

CSI: Miami might be out of production, but that doesn't mean we'll be deprived of casual eyewear flipping. Not if Ben Heck has a say in the matter, at least. His latest DIY project automatically swings a pair of clip-on sunglasses into view whenever it's too sunny outside: a photocell attached to an AT Tiny microcontroller checks the light levels and, through an Arduino-based AVR MKII language, tells a rotor to spin the glasses into place. No one will be labeled a fashionista with the requisite battery pack strapped to their heads, but the construction doesn't require CNC milling and won't destroy a favorite frame. We're only disappointed that the sunglasses won't play The Who on command... yet.

Continue reading Ben Heck builds Arduino-based automatic sunglasses, beats David Caruso to the punch (video)

Filed under: Wearables

Ben Heck builds Arduino-based automatic sunglasses, beats David Caruso to the punch (video) originally appeared on Engadget on Mon, 08 Oct 2012 22:44:00 EDT. Please see our terms for use of feeds.

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DJI multi-rotor aircraft with Ruling live video feed controller hands-on (video)

Posted on 16/04/2012 by Zach Honig

Well that's a mouthful. Shenzhen-based DJI Innovations was on hand at NAB today to demonstrate its new hex-rotor aircraft, designed to provide photographers (and videographers) with a low-cost tool for capturing aerial images. The vehicle we saw today, coined Spreading Wings S800 (its rotors retract for storage) is a fairly straightforward multi-rotor aircraft, save for a couple pretty slick enhancements. Even more impressive, however, was DJI's Ruling, a "ground control terminal" that enables you to adjust not only aircraft direction and elevation, but also the camera position, complete with a live video feed as captured by a Sony NEX-5N mounted on a multi-axis camera gimbal. The camera mount is designed to maintain a stable image regardless of the craft's position -- once it's fixed on a subject, it will adjust to retain the pre-selected angle.

The Ruling controller is very much still a prototype, with a yet-unpolished military green plastic housing and a built-in LCD. There's also dual joysticks -- one on the left to adjust the camera platform, and a second on the right to control the aircraft itself, letting you climb, descend and turn in every which way with a flick. The duo was very responsive during a brief demonstration, making calculated movements with what looked to be precise accuracy. The video feed was interrupted slightly by the multitude of wireless connections littering the Las Vegas Convention Center airwaves, but reps were still able to verify framing and adjust position -- the aircraft itself never faltered, with a maximum range of 10 kilometers (5km for the video feed, in ideal conditions). The Spreading Wings S800 is available for pre-order now and is expected to ship next month for roughly $8,500. That clever live video controller will cost you another pretty penny, however, with an estimated $5,000 price tag and a TBD ship date. You'll want to take a closer look in the video after the break.

Gallery: DJI multi-rotor aircraft with Ruling live video feed controller hands-on