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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

RC-CAM.com (main site and forum) will be closing down August 2021. This is being announced now (March 2021) so that everyone has time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.


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About quemazon

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  1. The MX614 is sort of a standard among the ham community. You can find it at www.glitchbuster.com. Only 1200 bps, though--fine for me, but I think you were looking for something faster. Nathan
  2. You are aparently not from the US, so this might not apply to you, but I'll post it anyway. Here in the US, FRS radios can be had for under $20 per pair. Data communications on the FRS frequencies are illegal however the radios, with a little work, can be modified to work on the ham band. This has been discussed pretty extensively on the radioexperimenter yahoo group. I've personally done it on 4 different radios, and it's an interesting project. Coupled with a simple modem, this is a very cheap solution. Nathan
  3. Yes, I've been using the piclist quite extensively for all of my routines. Eventually I should move up to a higher level language, but for now MPASM is free, universal, and forces me to understand what the PIC is doing. As for the math, it turns out that all I've needed is a 32 bit addition and negate, a 16x8 multiply and an 8 bit arctangent. The full set of routines is right around 500K. What compiler do you prefer, BTW? Nathan
  4. I looked at the Askin code for some time because it looked like it would do everything I'm looking for. They don't clearly state that the ouput of these units is binary, so I kept hunting aroud for the NMEA sentence parsing. Never found it though. When I finish my code I will probably post it. If not, I can send you a copy directly. Nathan
  5. The links were pretty informative, but knowing the conversion formulas and proceedures, and actaully implementing them on an 8-bit uC are two very different things. I'm looking for the later of the two. I'd like PIC code that implements the conversion formulas. Thanks, Nathan
  6. I have OEM modules (Motorola oncore) and they don't support waypoint calculation. I'm mostly done with my code though, and I have plans to make it accessible to others. I was just hoping to compare my code with others and refine it with other ideas. Anyway, thanks for your input. Nathan
  7. Thanks for the reply. What you describe is a conversion to unpacked binary coded decimal format. That's the first step in converting it to a useable binary, but you still have to convert the BCD to binary and scale it to a useable number. The degrees and minutes are different units, for example. Nathan
  8. Hi all, I have scoured the net for some time in search of code for a PIC (preferably in assembly) that can parse NMEA sentences, convert the data to a binary format, and calculate basic navigational parameters such as distance and angle to a waypoint. I keep thinking that SOMEONE must have tackled this task already, but I have yet to find it. Does anyone have links to such a project? I have seen code that will read NMEA and spit it out to an LCD, but the data stays in ASCII. For the purposes of a UAV, however, a binary conversion is needed so that flight parameters can be calculated. I h
  9. Hi all, I've been interested in this stuff for a while, and it's nice to finally find someone else working on it. I'm working on something similar to MikeP's project, but I would like to have the PIC (instead of the GPS) do the direction calculations. I have a few surplus GPS boards that only output position. I'm currently woking on reading the NMEA sentences and decoding them to a local 16-bit coordinate frame. I don't plan on flying very far, so a localized reference frame will make the calculations much easier on the PIC. My main concern right now is selecting a stable airframe. I hop
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