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jparisse

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About jparisse

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    RC-Cam'er

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    http://www.teslacoil.com
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  • Location
    Torrance, California
  • Interests
    Tesla Coils, Durms...
  1. jparisse

    Audio track as modem data NMEA

    DZL TX takes 5v which you can get from your RC RX. The GPS connects to the lower of two connector (connectors to the left) with just GND and TX lines (black and yellow). Jeff
  2. jparisse

    Audio track as modem data NMEA

    Thomas... You are like the Shaolin Priest from the old Kung Fu movies! Totally wise but cryptic to your followers! I have two sentences setup: GGA and RMC each at 1Hz so the data seems continuous to this human processor. I understand about the pauses but don't understand how one can program the GPS unit to produce them... Should I just lengthen the pause time between the sentences I am currently using (say 2 or 3Hz)? Is it that easy? Thanks for teaching me so much. Someday I hope to snatch the pebble from your hand... Jeff Mark... That is VERY cool and about time (ask 'em to make a 1000mW).
  3. jparisse

    Intelligent Flight OSD

    I'm getting busy at work and can not participate in the OSD Beta program. If anybody wants my Beta unit, PM me. $10 to cover postage is all I want. Jeff Edit - Sold to a US based NTSC user with AVR programming tools and knowledge.
  4. jparisse

    Audio track as modem data NMEA

    The modem is probably perfect but the audio fidelity (antique word) of the 650mW Lawmate TX is not so good... I flew a test today with the DZL Modem and above mentioned Lawmate TX. I should point out that I have messed with the audio pot on the TX so much that the screw driver slot is worn down. I think this pot is for impedance matching but on some TXs (as Mr. RC-CAM points out) is a carrier frequency adjustment for the audio channel. In either way, I used it to maximize the performance with a TinyTrac3 and, later, with the DZL Modem (less so). The “non-factory” setting of this pot may skew my results as reported herein. Also, I flew at a soccer field the Port of Los Angeles at Long Beach (one of the busiest sea ports in the World in one of the largest cities in the US) so R.F. traffic was very dense. I created a 5-mile GPS route for the plane to follow and used a laptop with cached Google Earth data for moving map visualization. The route was plotted over a 15 acre field with the plane staying within 1000' (305m) of the RX. The route took 20 minutes to fly and I had one loooong (5 minute) data drop out that wouldn't reset even with a power cycle of the DZL RX. The lights on my serial port adapter (my only TTL diagnostic tool at the field) blinked away and I restarted GE+ with no positive effect. The data stream restarted, by itself, a few minutes before I landed. I plan on switching over to the Airwave products to see if I get better performance ( like Thomas ) so wish me luck. BTW are there any commercial products build around the Airwave modules that Intelligent Flight AU sells? They seem to work well, are well supported on this forum and priced right (thanks Mark) but I am curious about a factory built and tested unit... Jeff
  5. jparisse

    Audio track as modem data NMEA

    Testing with Airwave I finished assembling a 633 TX and 634 RX from Airwave and tested the DZL Modem with them. Video looked clear and very much like the Lawmate product. The difference (as Thomas has already pointed out) is in the quality of the audio link(s). The square wave looked almost identical to Thomas’ screen shots and the TX tolerated a much wider range of pot settings. I added a .01uf, .1uf and 1uf filter cap just to see/hear if I could detect any difference or benefit. Maybe in a harsher airborne RF environment a filter cap could ground out LF but on the bench, I couldn’t see how it helps. Jeff
  6. jparisse

    Audio track as modem data NMEA

    Taz and Beta Team... The schematic and construction photos can be found on this thread. I wanted to keep everything here during the testing phase so we could all research this together. Thanks Gil... yeah, I love those plastic toolboxes from Stanley Tools! Jeff
  7. jparisse

    Thinking inside the box with a 633

    Thanks. It is sold as PCB repair copper by DATAK (LKG Industries). I usually line the inside of my RF boxes but this 633 and it's VReg get hot so I felt the surface area of the copper would help to keep things cool (plus I put my TXs out in the wind anyway). Jeff
  8. jparisse

    Audio track as modem data NMEA

    I run Google Earth Plus at home to survey the flying field and to cache the data so that when I'm away from the Internet the maps are still available. I use a laptop for telemetry and one of those portable 7" DVD players that are also dirt cheap on EBay for video and OSD data. I setup my gear inside the rear hatch of my car. My current ship: http://www.rcgroups.com/forums/showthread.php?t=631757 Jeff
  9. jparisse

    Audio track as modem data NMEA

    Right now I'm using Google Earth Plus... Jeff
  10. I followed Thomas and Mark's lead and soldered all the components including a VReg to the 633 and put it into a box. I used a 5c wire w/shield and copper RF foil. It works! Jeff
  11. jparisse

    Audio track as modem data NMEA

    40EUR=$54 about the same as a full DZL Beta kit with case, PCBs and all the parts. You're right, Gil... A bargan! Jeff
  12. jparisse

    Audio track as modem data NMEA

    Actually Gil, we are only interested in the set-up into which you have installed the DZL modem. This thread is for DZL users who wish to share information on the DZL modem and how it integrated into their plane. I bet most folks on RC-CAM have planes with cameras in 'em. I must reason that the DZL Modem works perfectly for you without any modifications. Great... so far 100% success. Jeff
  13. jparisse

    :) Voltage Regulator Help :)

    Just to put some numbers to it... at 5.5V the NTE1904 rose to 108.5F (42.5C) in three minutes. I didn't push it past that. That should be OK with a heatsink and perhaps outside of the fuselage. I was hoping to design a PCB without a heatsink and keep it exposed to air (relying on the AWM633 to self cool). If I mount the VReg upside-down, it can be folded over and attached to a piece of brass or aluminum that is laid across the top of the AWM633. Sort of like a heatsink sandwich (heatsink, component space, PCB). The heatsink only adds the option to use 5.5V rather than a single LiPoly cell. So perhaps IT should be an option. Just thinking... Jeff
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