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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.



Portela

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Everything posted by Portela

  1. Kilrah, Have we in this circuit, that is, by pressing a key channel of 5 or 6 to "ON" there is a time of 2 seconds to arm. Moving the key to the channel to "Off", is then fired the rocket. We must now create a way that prevents the release if the model destraĆ­do leave its equipment on the plane. Or connect the equipment in a sequence such as wrong turn on the circuit LM, connect the receiver and finally the radio. It is worth mentioning that the circuit LM can shoot up to 20 rockets, and if you shoot only "5" and put the plane, he irar record in permanent memory the last door that was
  2. Dear all, I'm simply comparing the "duty cycle" of the pulse which can vary from 1 to 2ms in high level with a 20ms repetition rate (period). The strategy I'm using is to reset a counter in the rising edge and read it in the falling edge of the pulse. The counter dimension is such that it doesn't overflow for much more than 2ms. There is a threshold value and enough resolution in the counter to indirectly but in a precise way measure this time. I adopted half of the up time (1.5ms) as a threshold and there is an histeresys to debounce the signal. The problem is that when the receiver is l
  3. Alain legal, Good to know that other colleagues have done that too. "I did not understand well the case of two channels." Note: I have only 1 channel free for use on this project. Alain, my translation to his post was complicated and that I understand you have projects with some logic already made. Please ask more details! If they want to write my email, is this: jeancarloportela-AT-gmail.com There can exchange files of the program circuits, photos and more. Thanks to everyone! Jean Portela Brazil - Sao Paulo
  4. Friends, I created a rocket launcher in which call for "LM" to my Tucano aircraft. I did the whole circuit using PIC 16F877. This circuit can fire up to 8 sparks that trigger the rockets. I have many care about safety such as using rockets with explosives, battery exclusive to this circuit and to fire a spark is needed up and down the keys of the radio channel 5 or 6 for two consecutive times. However I found a false signal problem, that is, assuming that someone reverse the order of linking the system Model aircraft (Wrong: Turn on the LM, connect the receiver, turn on the radio) This is a
  5. Friends, I created a rocket launcher in which call for "LM" to my Tucano aircraft. I did the whole circuit using PIC 16F877. This circuit can fire up to 8 sparks that trigger the rockets. I have many care about safety such as using rockets with explosives, battery exclusive to this circuit and to fire a spark is needed up and down the keys of the radio channel 5 or 6 for two consecutive times. However I found a false signal problem, that is, assuming that someone reverse the order of linking the system Model aircraft (Wrong: Turn on the LM, connect the receiver, turn on the radio) This is a
  6. Friends, I created a rocket launcher in which call for "LM" to my Tucano aircraft. I did the whole circuit using PIC 16F877. This circuit can fire up to 8 sparks that trigger the rockets. I have many care about safety such as using rockets with explosives, battery exclusive to this circuit and to fire a spark is needed up and down the keys of the radio channel 5 or 6 for two consecutive times. However I found a false signal problem, that is, assuming that someone reverse the order of linking the system Model aircraft (Wrong: Turn on the LM, connect the receiver, turn on the radio) This is a
  7. You'd be sure this is a valid signal ( supposing another transmitter on the same channel isn't turned ON !!! ) I can measure the time of false pulse on futaba 127df and if it will happen, not increase the meter. More if I use another receiver from other technology as R617FS is that the false pulse is the same. What with the apparatus to measure the pulse false? Jean Portela Brazil
  8. Unfortunately I can not put a delay. What I would do is put something mechanical to interpret and defeat this false signal.
  9. I created a circuit that connects to the PIC channel 5 or 6. Tthis circuit receives the signal that channel and increases a counter. My problem occurs when the receiver is turned on the radio before, it makes the circuit increase unduly because of a false pulse. I need to find a way when the receiver is turned on before the radio, not increase the meter (does not have this false jump). I need to treat this disturbing signal. Jean Portela Brazil - SP 17/10/2008
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