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androidi

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About androidi

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  1. Ok, so I pondered this thing a bit. After digging some practical information, I found the relevant links. Looking at PAL, which has a higher frequency than NTSC, Wikipedia tells about as much as is needed for determining the data speed. – Both PAL and NTSC are irrelevant after this, except considering the modulation capabilities of el cheapo vtxs.. https://en.wikipedia.org/wiki/PAL So we are looking at 8 MHz max frequency, which is achievable quite easily. First hit points to a TI set (from 1994!): http://www.ti.com/lit/an/slwa022/slwa022.pdf Instead of just sending FM, QAM should be
  2. From Finland. I guess it won't matter. But I'm not sure if it's legal to actually create radios of any kind in here without the license. So those devices really are dummies. That's beyond great news! No more Arduino tinkering, yesss... I actually have one custom SAMD21/RTOS-project right now, but in a couple of days I will return to this project and start poking around the CCTV board with the HiSilicon SDK. It's great to have more people interested in doing this "the other way around".
  3. I got myself a CCTV from AliExpress, it was like 30 USD: https://www.aliexpress.com/item/H-265-H-264-3-0MP-2048-1536-IP-StarLight-Camera-Module-Board-3516C-IMX291-FishEye/32822600792.html That camera does not utilize the full possible frame-rate of IMX291, but it's "easy" to start with. I've got the HiSilicon SDK for 3516C and the likes, and another SDK set for 3798M, which is the chip in the DVR board (also about 30 USD): https://www.aliexpress.com/item/8CH-CCTV-H-265-NVR-Board-4K-5MP-4MP-HI3798M-Security-NVR-Module-4CH-5MP-8CH/32810674862.html HiSilicon has even mo
  4. I just have to comment on this thread. I'm (too) currently investigating a possibility to have a digital link / HD image on FPV systems. What most of the people overlook, is the channel bandwidth. On 5.8GHz FPV vTX-link, we're looking at about 20 MHz. - What was the link width of a WiFi system again? Yes, the same 20 MHz (some might have MIMO these days, which have 40 or 80 MHz). So the default 20 MHz channel width is more than plenty, since I know, for a fact, that there are millions of Netflix users out there, who have 20 MHz WiFi at home. And it works. So... digital HD image fits
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