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Trunk's Technical Blog

The Etiquette of Sharing Skydiving Photos

Posted by Mark Kirschenbaum on

Let me start with saying I love when people share my photos. I get gratification out of seeing my work as your profile picture, featured on your Instagram account, or even passed around Chive. I shoot because I enjoy capturing people's pure smiles in freefall. Regrettably, the truth is, most Skydiving Photographers make little to no money off of event photography. Personally, I spend 5-8 hours ingesting, editing, watermarking, and posting a weekend's worth of photos. At the bigger events, we get reimbursed for...

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Latest GoPro HERO is actually a GoPro HERO5

Posted by Mark Kirschenbaum on

We purchased a GoPro HERO (2018) the other day and after some cursory inspection we realized this camera is actually a GoPro HERO5 with the firmware crippled. To confirm our hypothesis, we decided to trick the camera to loading the GoPro HERO5 software. It loaded properly and all the features were unlocked. Even GPS and 4K at 30fps work great! Some people were worried that we're overclocking the parts. After inspecting the device tree, we can confirm the processors and DSPs between the two...

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The little camera that almost could skydive: Sony DSC-RX0

Posted by Mark Kirschenbaum on

The Sony DSC-RX0 is an awesome little camera, but we don't feel it's the best for skydiving. Read up on our observations and settings after several test jumps with this camera. Check out some photos and videos produced from the Sony RX0 and compared with other solutions.

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GoPro HEROBus™ 2 Research

Posted by Mark Kirschenbaum on

 FOR SECURITY RESEARCH / Interoperability with our products.   The good news is the HEROBus™ is alive and well on the GoPro HERO [5-8]. The bad news is its extremely locked down and needs a BGA part and a crypto key to make it work. The needed parts are: Cypress EZ-PD CCG2 - USB type-C Controller - Accessory CYPD2104-20FNXI 20 pin $1.79 CYPD2122-20FNXI 20 pin $1.98 ATMEL ATSHA204A - Authentication Chip <- Protected! ATSHA204A-XHDA-T I2C version TSSOP $0.55 The HEROBus™ i2c Slave or Vendor...

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Samsung Gear Sport Teardown

Posted by Mark Kirschenbaum on

I recently picked up the Samsung Gear Sport for the possibility of skydiving with it, tracking my daily activity, and getting notifications from my iPhone. Temptation got the best of me, and around hour one, I decided to have a look what's inside.  Disassembly of SM-R600 (Samsung Gear Sport) Overall, disassembly is easy. Just remove the four, 3-wing screws located in each corner.  The bottom pops off with a gentle pry from a spudger. Obviously, be sure to clean off both mating surfaces before closing the unit...

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