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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.



jparisse

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Everything posted by jparisse

  1. The first thing I did this morning was to power up my protoboard and scope out all the pins on the RX (I think my electronics addiction is no longer in remission). I noticed that Thomas mentioned breadboardS; as in plural. I am going to separate the working TX onto a different protoboard to isolate the two circuits electrically and see if that helps. It is weird that I got pulse out when my clock was incorrectly set for divide by 8. I tried setting it back just to see: nothing. I have switched ATTINY2313 chips too and I get the same results (I also swapped the capacitors before deciding i
  2. Double and triple checked everything... still no digital signal on RX Pin3. The chips are talking to the AVRISP and the TX seems to work fine (nice 5kHz triangle wave) and the modulation lines up with the digital in so I'm going to focus my troubleshooting on the RX side. Not tonight... the pizza and cola late nights are long over (I have kids too). Jeff
  3. Thanks Thomas! The input is a NMEA 4800baud serial stream from GPS. I DID miss the /8 fuse and I changed to “disable” (tones are now higher in freq. when TX output is fed to audio amplifier). TX outputs seem to be on Pins 12 & 13 not 11 & 12 as shown in schematic. All programming feedback on both chips is positive “OK” RX output is still zero. I plan on testing other pins and lastly switching chips. Jeff Re: Jokes... I get ALL the Tesla coil questions!
  4. Thomas, You wrote: "People that construct cool RC planes, with cool video gear, will be able to make an AVR programmer, and do this simple hw all by them self, it is unsupportet, and we will not answer questions and we can not help if they can not find out how it should work. if no skils, ask a dude near your self to program and test it :-)" I just wanted to be sensitive to your “gift” and not trouble with my newbie questions. Thank you for clarifying you position, I'm sorry I misunderstood. Yes, DZL should be given credit for the code. But he is only three letters to me so he’s s
  5. Right On! That's how it looked to me but I have to check... Thanks for the newbie help! Jeff p.s. As a "real" director, I get a big kick out of seeing "Stage Hand" next to my name. I guess in this realm, I AM a Stage Hand! Too much fun! Thanks again! www.teslacoil.com
  6. Tom, Thanks... I d/l'ed the data sheet and I see now how the reset pin works (no wonder Thomas S. didn't want to answer any questions....). I'm set to go and will give it another try tonight. The crystal is mentioned as optional and I remember seeing something in AVRStudio about settting the kHz as a software option. Before I jump in, is there anything I should know about the "option" of a resonator? I reviewed the application notes in case I have to add one. Jeff
  7. Yes, I studied that document. On page 24 it seems as if Pin 1 is closest to the viewer (farthest from edge of target board shown). The PinOut on Page 26 doesn't say if the plug is viewed from the bottom or top (I assumed top and wired as such). The RESET line description on the same page is unclear (to me). As is the reference to the pull up resistors on the data lines as I just connected those directly (i.e. I jumpered the plug of the AVRISP to the pins on the chip. I figure I'm very close... Thanks for your help Tom! Jeff p.s. I'm gettin' a Butterfly after this is all
  8. Guys, I'm attempting to burn Thomas Scherrer's modem software onto a pair of ATMEL ATTINY2313 microcontrollers. He asked not to be bothered with questions so I am addressing my questions here instead. I have experience with BasicStamps so I am somewhat familiar with the process but I need a bit of hand holding to connect the AVRISP programmer to the chip to burn the program onto it. I don’t speak C or Assembly. First Question: Is the SK500 development board (or others like it) necessary for chip burning or can the AVRISP be directly connected to the microcontroller? I ask because the
  9. Thomas, Thank you also for the videos! I love seeing other people’s high voltage laboratories. The best part was watching how the high voltage experimentation was bothering the two guys trying to watch football on TV. Very nice diode array too. I’m gathering parts for the modem project. I’m sure I’ll have hundreds of questions but I’ll keep them to myself. I’m learning FSK with some help from local engineers and hope to write my own code for the BasicStamp someday (yes, don’t laugh, I’m new to microcontrollers – I usually make my electrical connections with a large box wrench). I’ll k
  10. Thomas, The realtime GPS function is now part of Google Earth Plus. One can pan, zoom and tilt cached data off line which makes this a great program for moving map. One can even tilt the map to near horizontal to see a virtual forward view as the plane flys around. As far as the modem: I understand completely. I'd be willing to kit and sell this modem if dzl is willing to part with the source code. I'll trade him Tesla coil parts. ;-) I ordered the programmer, software and a couple of chips so I should be able to whip this up next week. Tesla: 1.5 meters is not bad for the power you w
  11. Thank you Thomas... So.... You're into Tesla coils? I'm Jeff Parisse, owner of kVA Effects. Are you a member of the pupman list? We make giant Tesla coils for advertising and entertainment. Check out www.reinmedia.com/kva it is our new site about to go on line. We can normally be found at www.teslacoil.com Back to the modem: The killer application that will cause a demand for this circuit is the realtime GPS feature addition to Google Earth. This lets Google Earth to be used as a moving map program with TONS of advantages over other map programs. I believe you should commercialize thi
  12. Thanks for the quick reply. I follow what you’re suggesting and I will attempt to breadboard it up even though we’re at the outskirts of my electronics knowledge (I work in high voltage and make most of my electrical connections with a 15/16” box wrench). I’ve also posted a request for details on the other guy’s approach. Thanks. Using the audio channel seems like such a no-brainer; I don’t know why people choose APRS over a serial connection to a GPS. Is adding a Maxstream SO simple that it makes wasting an audio channel OK? I’d rather pay $50 for a simple serial modem set than a Tin
  13. Are there any details you can share? I'd like to also see your technique and attempt to duplicate it. Thanks. I'd like to feed the serial data to Goofle Earth's realtime GPS feature. Jeff
  14. I found this on R/C Groups... "If you will be using a wireless video Tx on the R/C model then there may be no reason to employ any modulation schemes at all. The audio channel on these often have very high bandwidth and good DC fidelity. You can merely connect your TTL level RS-232 output to the audio input (attenuate as needed). On the Rx end, just level shift and buffer the signal, then feed into a microcontroller or host PC's serial port. Baud rates of 2400 to 19.2K are possible on some systems using this simple Muntz'd technique. This trickery was reported by a fellow on the RC-CAM
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