the.Legend

Members
  • Content

    51
  • Joined

  • Last visited

  • Days Won

    1
  • Feedback

    N/A

the.Legend last won the day on September 16 2020

the.Legend had the most liked content!

Community Reputation

19 Neutral

Gear

  • Main Canopy Size
    140
  • Reserve Canopy Size
    150
  • AAD
    Vigil 2 Control Unit

Jump Profile

  • License
    C
  • License Number
    45848
  • Licensing Organization
    USPA
  • Years in Sport
    3

Ratings and Rigging

  • USPA Coach
    Yes

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. If you record GPS data somewhere you may try Dashware (http://www.dashware.net/dashware-download/) - it's free and can support multiple GPS formats. You can even build your own gauges. I used it for overlaying GoPro's GPS data, although it was tricky and required first exporting the data from the video file via https://goprotelemetryextractor.com/free/# and then linking it back in the app. App's development has been discontinued in 2015, it still works, but it's not always user-firendly. Another bummer GoPro is slow to pick up GPS signal once it starts recording, so you may have data recorded starting from the middle of the jump For basic stats you may use GoPro's moble app and simply put one of stickers they offer (but those are basic, unlike fully custom ones in Dashware) GoPro 6 and later all have this feature enabled by default
  2. LCDs and TFTs are passive by their nature - they require backlight, unlike OLED where pixels are light emitters themselves. Without backlight LCDs can't be used in night jumps. Also they would be harder to read while looking at some dark background even in bright daylight (I did some basic tests and something that's not glowing is in general harder to read). Basically it needs a backlight and that backlight adds extra thickness, and in this case every millimeter counts. I've ordered this one with IPS display, and the whole unit is 8mm thick compared to 1.5mm OLED display (4mm when in 3Dprinted frame): http://www.lilygo.cn/prod_view.aspx?TypeId=50033&Id=1126&FId=t3:50033:3
  3. Yes, I've just ordered few more units for wider testing, one of them is LCD-based. It has ~0.2 inches smaller screen and is a bit thicker, but on the other hand everything is fixed to the board i.e. no flex cables to deal with. And it's colorful. Primary reasons for OLED were transparency (which backfired on me, but still few tests to be done with tinted tape) and the thickness of the display Parcel would arrive around mid October, meanwhile I'll be looking at improving casing, wiring and writing new code.
  4. The unit has been tested through the weekend and I'm really happy that it worked! Unlike previous attempts, when proprietary GPS units couldn't handle freefall, this time GPS data was displayed during all phases of the flight. Update was to 250ms and unit reaction time was pretty accurate. GPS unit rated up to 5Hz, with time it will be upgraded to 10Hz (same as in FlySight) I didn't have time to order tinted tape, so I put black one on the back, and on a bright day digits were readable no problem at all. Despite digits being blurry (the image attached is pretty close to what's in reality) it was easy to read them during the flight. Display is not distracting and could be looked at with quick eye movement. You might need some practice on the ground first just to get used to it, but then during the flight it didn't take an effort to check speed. As promised, basic source code and hastily written assembly instructions: https://github.com/RomanTheLegend/WingsuitGps Contributions are welcome because I won't have enough time to develop this project at a good pace, and there are few quite complex functions to be implemented. Next on the ToDo list: * Make few more units for my friends for wider testing and feedback (mid-October because shipping is only from China) * Make 3D models and wiring cleaner and leaner * Explore the possibility of attaching some control switches - that would allow to write some kind of menu interface in the future P.S. I got carried away a bit and added Bluetooth intercom made from old cheap headset while at it. This helmet gets more and more advanced
  5. Prototype ready and assembled. I tested it today riding a bicycle in cloudy weather and it was readable. In bright sunlight this OLED is too weak on its own, but it could be improved by putting some tinted tape on the back of the frame, or in worst case a piece of duct tape. Will be testing it this Saturday, hopefully, it will be able to catch up with readings. GPS module is rated up to 5 Hz (similar to FlySight) so if anything, the bottlenecks would be in the code. I'm wrapping up the documentation & source code, will post it after field tests
  6. Yes, I'm perfectly are of that problem. I'm trying to overcome it by combining screen big enough so that even blurry text/numbers at close distance are readable, and putting it as far as possible for the best results. So far sticking OLED to the visor on the outside seem to be good enough. That's why it has to be transparent - big screen obscures more view. Also it's placed not directly in front of an eye, but at the bottom and to the side - again to get more distance and obscure less view. LilyGo TTV has arrived about a week ago and actually I'm quite impressed with what they've managed to squeeze in such a small package - it even has WiFi! And plenty of power in the processor, so with time the functionality could be extended. I've hooked up the GPS and it works, now I'm sorting out few technical challenges * Extend wiring so that unit could be hidden in one of audible pockets * Test with different batteries. The stock one is too small, it lasted for just about 1-2 hours working only as a display. For that I had to hook up GPS module to external battery with higher voltage * There's 5-10 seconds delay in GPS readings - displayed speed lags behind actual speed. Likely some bug in the code. Same GPS module on Arduino had better reaction time In few days I'll post an update with link to GitHub for anyone interested
  7. Another alternative is to use transparent OLED display. Surprisingly, there's a product with everything on-board except GPS: http://www.lilygo.cn/prod_view.aspx?TypeId=50032&Id=1354&FId=t3:50032:3 Battery, OLED, drivers - everything is already assembled. It's based on ESP32 and is fully programmable, so adding GPS module won't be that difficult. I'm waiting for the package delivery (in about one month because from China) and will share the test results
  8. My attempt at something similar. Really basic code on Arduino Zero + some LEDs It supposed to show horizontal speed and heading (in degrees) but there's no GPS signal in the apartment Pros: * Cheap and really easy to build * Numbers on LED are kinda readable because it's standard LED numbers font (although it needs some time to get used to) * Easy to program new display information in basic C code * Numbers are readable even in bright light * Size could be reduced by 50% easily (most of the space is used by battery and its charger) Cons: * Numbers on LED are kinda readable (although it needs some time to get used to) Dry tests on the ground so far, not jumped this thing yet (want to reduce its size first) I'm looking for good alternative for LED so it would obscure even less view, but here I'm facing the problem with finding something readable at close range. I thought about monocle displays because they use standard AV input and thus may be used with Arduino too. @Gideon Yampolsky could you please elaborate on what exactly was inconvenient with Vufine display? gps_Full HD 1080p_(1).mp4
  9. Post on FB on some rigger groups - from time to time people are looking for old canopies to practice sewing skills
  10. Interesting. How about replacing the LCD with a monocular then? https://www.aliexpress.com/item/1005001355384065.html
  11. I was watching old video from WS race and noticed that competitors intentionally do a backflip on exit (1:41 on video) What's the reason behind that? Is that because for a second you have head-down dive, so flier gets more initial momentum and also suit inflates faster?
  12. Quick update: battery has been replaced with other, more reliable and I was able to test it today. Long story short - the unit didn't work as well as I'd expected: it was perfectly fine during the climb, showing both ground speed and distance, but during the jump when altitude drops quickly it just stops processing all the readings. Under the canopy it works again, but the moment you do any kind of dive it stops reading again for a second. Well, it wasn't designed for skydiving after all, so nothing to complain about. At least I was able to measure my ground speed under the canopy, so it could be used for some basic canopy piloting drills, but nothing more than that. P.S. Turns out the plane travels in circles roughly 70 km at ~190km/h to climb to a 4k
  13. Just out of curiosity where are you planning to store fuel tanks and what's their capacity? Was this design inspired by Igor Negoda's youtube videos? :)
  14. Yeah, Kharkiv does that. This year's Polish BigWay record was supposed to happen there with An-72 being the delivery boi but then covid happened But as far as I know An-72 is not commercial and actually belongs to military, so usually they take it for special occasions like bigway or sequential camps, while regular-day jumps are from An-28 - beautiful turbofan machine with rear ramp and twin tail :) Prices for food and accommodation in Ukraine are really low compared to Europe or US, ticker price is around 27$ though https://skydive.com.ua/en/index.php
  15. A quick project for tracking basic data during flight. This is a garage project I made out of own curiosity. Not tested in flight yet, if you decide to do it you're doing it at your own risk. There are advanced solutions on the market like Dekunu One or Aon X2 and if you can afford them I encourage you to use professionally made equipment. You'd need: * Car GPS speedometer (I used this one because its shape and size are already almost snag-free: https://www.aliexpress.com/item/4000265066382.html * Powerbank (with least capacity and smallest size possible - in the prototype this one was used: https://www.aliexpress.com/item/32945597181.html ) * 850 mAh battery (ideally 2000 mAh, but unlikely they'll fit inside the case) * Small switch Assembly is pretty straightforward: unsolder USB ports on both GPS and powerbank, solder switch and battery. Additionally I flipped the capacitor (it's under white tape on the first photo) - put it on the opposite site of the board to give some room for powerbank's charger. The device is mounted on a rig using velcro strap with a loop. So far I tested it on the ground on a bike and the speed is pretty accurate - +/- 1 km/h to what smartphone GPS shows Even with 850 mAh battery the device help up for around 8-10 hours (screen constantly on) which is quite impressed actually. Talking about the battery - attentive reader might notice that it got swollen - probably because powerbank's changer is for 2000 mAh, while battery is 850 mAh. That's a critical flaw because swollen battery has high risk of explosion as pressure changes during climb to the altitude. If I ever decide to use it for actual tests, the batteries will be replaced with non-chargeable lithium batteries just like in audibles (powerbank's module would still nicely convert that into a constant 5V supply). Meanwhile I'm doing some more research to find safe chargeable batteries. Now, what this thing can do: * Display current ground speed (both metric and those other, inferior units). Speed alarm can be set at as high as 200 km/h, so I'd assume device can measure at lease that much * Display one of 8 directions ( N/NE/E/SE and so on) - yeah, it's pretty basic, but better than nothing * Display distance covered, accuracy 100m * Display few other stats, but those are useless for WS flying * Oh, yeah, you can change colors Again, this is a garage project. I'm only sharing the fruits of my curiosity and taking no responsibility for what you might do with it.