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About Bushman

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  1. I was thinking I could take the concept behind this toy I made and use it for visualizing vibrations on my glow powered trainer and using that info to reduce them etc. The concept (which is hardly new) is that if you strobe a light at the same frequency as an oscillating object, it will appear to be frozen in time because you only see it illuminated at the same point of each oscillation. For example if I put a UV reflective dot on a wheel, spin the wheel at 100RPM, and then strobe a UV light at 100Hz then the dot will appear frozen in time. It would be possible to place a few marks with a common highlighter on the prop and various places on the plane to be able to visualize the vibrations on the aircraft. The strobe frequency could be controlled by a dial, or by a sound sensor that is triggered every time the motor fires, or a combination of the two. The question is, would it be useful or just mostly amusing? I think I could get it visible as long as its in the shade so you wouldn't have to wait till night time... or try and run your aircraft in the closet with the lights off.
  2. CTS and RTS are only used when flow control is active. Clear To Send Request To Send as noted, the GPS units do not use them.
  3. 75Ohms is what I get. I was mistaken about it working with my other video reciever, they both give crappy washed out video while my cam corder is crystal clear. I'm thinking I must have knocked something loose inside because I really don't recall it being this way before.
  4. My Futaba S3114 jump around like mexican jumping beans when I get them that close to my 500mW video Tx I plan on doing something similar though.
  5. Also, if you want to save yourself a little time and the application while doing bench work you might want to pick up one or two of these. http://www.sparkfun.com/commerce/product_i...products_id=133 or http://www.acroname.com/robotics/parts/S13...L-INT-CONN.html You will of course probably want the level conversion integrated on board with your final version of the project, but these little guys are super handy when doing prototyping etc.
  6. I once made a setup with an airsoft gun on pan tilt base with a webcam that was all controllable via a web interface. Once the url got around we had to shut it off, people were trying to shoot the lights out and stuff. We kept the gun unloaded most of the time, but you could see it occasionally track you across the room, or feel it staring at the back of your head.
  7. Hey there, I'm home from a great day of flying. The bad thing is I crashed the heck out of my intended aircraft last night and had to use my glow powered aircraft instead. This meant a very long delay today while switching the camera over etc. I simply didn't have any time to do any good tests for you. Here is what I have though, I hope its helpful. After reviewing the flight video and checking google earth, I don't think my aircraft got any more than half a mile away in ground distance. I'm a poor judge in hight but at one point I got up a good bit, maybe 600 feet or more. I'm guessing I was getting about 2000 feet before I had much problems, and my aircrafts orientation made a big difference in crappy video or good video. My TX antenna was swept back somewhat on the airplane so that I would intentionally lose signal moving away and get a better signal when I started to turn home. My Rx antenna was pointing straight up. (I wish now I had angled it a little toward the area I was flying in). I had it on a tripod about 5 feet off the ground. Now for the part that is most useful to you. My first landing was ended up about 500 feet away from where my because I was trying to land on a small dirt road and had to veer away when I realized it was lined with a wire fence. At this range, video was still available, but it was total crud. My antenna at this point was only inches from the ground. In the recorded video I had a perfect signal about 600 feet further away and only 5 feet off the ground with the aircraft. If you can manage to raise your Tx Antenna a few feet off the ground, I would estimate that you could get maybe 800 feet out of the same 900Mhz system I use. But video will never be crystal clear at anything over 300 feet or so. I don't have any info on how badly trees and brush will affect you. I do know that 2.4Gz hates trees.
  8. revo, I'm hopefully going flying tomorrow (Sunday the 11) with my 500mW 900Mhz video transmitter. If I get a chance, I'll get some ground tests for you so you can get a better idea of range near ground with both the camera and the controls. I'll post here when I have results.
  9. I got my transmitter from range video. www.rangevideo.com I'm not sure if 900Mhz or 2.4Ghz will work better for near ground transmission etc. In general, the higher you can get your transmitting and recieving antenna from the ground, the better signal you will get. As an example, with my 900Mhz 500mW transmitter, I get perfectly clear video from 1/3 mile away, my plane hit the ground and that range got reduces to about 100 yards due to the high underbrush. My guess is that even with line of sight (no trees or buildings) you will get nowhere near 2 mile range near the ground. As long as the camera has NTSC video output you can feed that into the range video transmitters. You will have to either purchase or make your own adapter to go from the RCA connectors of your camera to the 3 pin connector of the range video (and most other) transmitters. The camera you linked to does indeed have NTSC output as do just about every camera you buy.
  10. I've been thinking how easy it would be to mount cheap lasers on the aircraft that 'shot' a pulsed beam. The target aircraft would have recievers mounted that would count a hit when shot with the beam. Better yet, airborne airsoft.
  11. I recently purchased a 500mW 900Mhz system from Range Video (excellent service btw) that included the camera, transmitter, and receiver. When I plug the video output of the receiver into my small 7 inch monitor, the picture is very poor. The image seems over exposed and the colors are washed out. If I plug the same system (using the same video cable) into my camcorder, it records a perfect picture. I have another receiver for a different wireless camera system (one of those Swann micro cams) that works fine on both the monitor and the camcorder. I'm a little confused as to what is going on but I am assuming that it has something to do with the cable resistance. The television shows a much better picture if I use a splitter cable to split the video signal from the receiver to both my monitor and my camcorder, the picture is even better if I add an extension cable between the receiver and the monitor. Anyone have any ideas as to what might be going on? I'm using standard RCA audio/video cables here. The cables that go from the receiver to the monitor/camcorder has an RCA connector on one side and a jack type plug on the end that goes into the monitor/camcorder.
  12. The Olimex ICD2 is the way to go for PIC programming. If you are a total newcomer to microcontrollers, you might want to try something simple like the PICAXE system. Take a look over at sparkfun. http://www.sparkfun.com/commerce/categorie...php?cPath=2_125 PICAXE makes getting into the game quite a bit easier.
  13. That is EXACTLY what I'm looking for. Does the video output stall when you take a still shot or anything funky like that?
  14. Hey guys, I just ordered a FPV setup with a Easystar, 900Mhz vid transmitter, and some other goodies. I got a KX131 camera to go with it, but I would really like to be able to take decent quality stills as well. 3.1 mega pixels would be satisfactory. ] There are two problems I would like to solve. First, I don't want the weight of both devices(video and still) on the aircraft. Second, I would like to know exactly what I'm taking snapshots of. If I mount the video and the still camera pointing in the same direction I can have a general idea of what my stills will capture, but I'm interested in a pan tilt setup and it may be somewhat cumbersome to pan/tilt both camera's at the same time. The ideal solution in my mind is a still camera that is capable of putting out NTSC video over composit cables just like the KX131 can, but also of snapping stills on command and storing them on a SD card or the like. I know the CMUcam (http://www.cmucam.org/) is capable of this, but both video and still quality are crud. Poor video quality I can live with because I'm simply using it to fly the aircraft and get it in position for a good photo, but the still capability must be decent. Any ideas?
  15. Success!! I followed the KISS principle and just made the PIC watch for a high pulse that was between 150 and 170us, it ignores everything else. Here is my lovely assistant Alyssa demonstrating how easy it is to press the X-Port button and get the LCD to report a HIT and light up an LED. Next step: Design a Air to Ground rocket launcher
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