---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 04/15/06: 25 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:27 AM - Radio noise with HID lights (Gilles Thesee) 2. 06:32 AM - Re: Avionics=Black Art (Mark & Lisa) 3. 06:46 AM - Re: Radio noise with HID lights (Robert L. Nuckolls, III) 4. 07:00 AM - datalogging (Ken) 5. 07:00 AM - Re: School stuff (Robert L. Nuckolls, III) 6. 07:28 AM - Re: Radio noise with HID lights (Gilles Thesee) 7. 07:33 AM - antenna construction (Dj Merrill) 8. 07:51 AM - Re: School stuff (Mickey Coggins) 9. 07:58 AM - Re: antenna construction (Dave Morris \) 10. 08:07 AM - Re: Radio noise with HID lights (Alan K. Adamson) 11. 08:37 AM - Re: Re: Avionics=Black Art (Charlie England) 12. 08:39 AM - Re: OVM nuisance trips during engine start (guy fulton) 13. 10:09 AM - Re: Radio noise with HID lights (Gilles Thesee) 14. 12:20 PM - Re: DIY data acquisition (DAS) systems (Robert L. Nuckolls, III) 15. 12:27 PM - Re: DAS Systems (Robert L. Nuckolls, III) 16. 12:27 PM - newbie with question (Sid Hausding) 17. 12:55 PM - Troubleshooting ANR headset wierdness (James Freeman) 18. 01:42 PM - Re: antenna construction (Kevin Horton) 19. 02:01 PM - Re: newbie with question (B Tomm) 20. 02:35 PM - Re: DAS systems (Robert L. Nuckolls, III) 21. 06:09 PM - Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 (Lee Logan) 22. 06:56 PM - Re: Re: DAS Systems (Brian Lloyd) 23. 07:01 PM - Re: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 (Alan K. Adamson) 24. 07:23 PM - Re: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 (Alan K. Adamson) 25. 08:50 PM - - 04/14/06 (Sid Hausding) ________________________________ Message 1 _____________________________________ Time: 03:27:07 AM PST US From: Gilles Thesee Subject: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: Gilles Thesee Hi Bob and all, A buddy is submitting the following : He installed two auto-conversion HID lights on his MCR 01 gear legs. The ballast boxes are in the fuselage, with 18 inch high tension leads. The VHF antenna is under the fuselage, about 5-7 feet behind the boxes. He is experiencing radio noise at frequencies below 120 MHz. Noise is not audible during lights warmup, only when warm. He tried feeding the HID boxes with an independant battery, to no avail. Noise is heard also with a handheld radio. Any idea how to work around this problem ? Thanks in advance, Regards, Gilles Thesee Grenoble, France http://contrails.free.fr ________________________________ Message 2 _____________________________________ Time: 06:32:56 AM PST US From: "Mark & Lisa" Subject: AeroElectric-List: RE: Avionics=Black Art --> AeroElectric-List message posted by: "Mark & Lisa" Angier, I've taken the liberty of forwarding your question to the AeroElectric-List on the Matronics list server. This list is moderated by Bob Nuckolls and read by many 'lectric-smart people (I'm a reader, but not one of the 'lectric-smart ones). Hopefully someone there can answer your question, and you might consider joining the list -- lots of good info there. Regards, Mark & Lisa Sletten Legacy FG N828LM http://www.legacyfgbuilder.com > -----Original Message----- > From: Greenbacks, Ltd. [mailto:N4ZQ@comcast.net] > Sent: Friday, April 14, 2006 23:23 > Subject: Re: Avionics=Black Art > > > Before igniting a spirited discussion on the subject of wiring a > panel, I'll cheerfully disclose that I have no formal training and > have a hard time trying to explain how an electron moves from one > place to another. This said, how do we resolve an apparent conflict. > The technical wizards at Garmin say in no uncertain terms that with > shielded cables (comm primarily) the shield must be grounded at both > ends. Other technical wizards at L3/Goodrich Avionics(WX500 > Stormscope) are adamant that shielded cables (Tx/Rx) must only be > grounded at one end. In the case of the Wx500 talking the the MX20, > the Tx cable is to the shielded at the processor end only and the Rx > cable shielded at the MX20 end only. Never mind the fact that the > WX500 install manual calls out for these cables to be shielded at > both ends. > > I suspect there may be a ground loop potential in here somewhere and > would welcome feedback from anyone one on the list who actually makes > a living do'in this stuff day to day. > > I've got the WX500 up and running on the bench and haven't blown the > thing up yet so maybe there's hope. ): > > Angier Ames > N4ZQ > N3ZQ > ________________________________ Message 3 _____________________________________ Time: 06:46:48 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 12:14 PM 4/15/2006 +0200, you wrote: >--> AeroElectric-List message posted by: Gilles Thesee > > >Hi Bob and all, > >A buddy is submitting the following : > >He installed two auto-conversion HID lights on his MCR 01 gear legs. The >ballast boxes are in the fuselage, with 18 inch high tension leads. The >VHF antenna is under the fuselage, about 5-7 feet behind the boxes. >He is experiencing radio noise at frequencies below 120 MHz. Noise is >not audible during lights warmup, only when warm. >He tried feeding the HID boxes with an independant battery, to no avail. >Noise is heard also with a handheld radio. >Any idea how to work around this problem ? The usual approach is to take the device to the RF lab to research the propagation mode for noise and then deduce mitigation techniques. It's exceedingly difficult to offer specific recommendations without putting one's hands on the hardware and probing it's characteristics with the appropriate tools. The broad-brush advice would include things like shielded enclosures and filtered penetrations for wires. However, one needs to be mindful of possible deleterious effects of filters on proper operation of the system. He could try ferrite beads on the leads, and enclosing all the electronics in a metal box. Bob . . . < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss > ________________________________ Message 4 _____________________________________ Time: 07:00:17 AM PST US From: Ken Subject: AeroElectric-List: datalogging --> AeroElectric-List message posted by: Ken Bob - As a matter of fact I do use a 486 windows95 laptop to talk to cars and my airplane - which mostly thinks it is still a car ;) It has a "normal" or "bidirectional" choice for the printer port but doesn't specifically list an EPP choice like I have seen on other machines. I may talk to you about the Base2 module after I get a chance to look into my ignition situation some more. I'd happily find a USB equipped machine if you develop a datalogging circuit or kit for that however this prompted me to start searching a bit differently. http://www.picotech.com/low-cost-data-loggers.html is interesting. It looks like Pico offers a $100. parallel port device that may run 20kS/sec on the 8 bit version. (slightly slower on the 12 bit version) It can dump to windows, Excel, (slowly) or DOS. I will study the manual tonight for the sustained transfer speed and length but the biggest obvious limitation seems to be that it is set up for 0 to 5 volt inputs and would need some signal conditioning.. Thank you everyone who made suggestions. You fellows in the USA sure have a tremendous advantage in availability and cost of "toys" compared to us in Canada. Import costs are often prohibitive. Ken Robert L. Nuckolls, III wrote: snip > The 1K of memory isn't a big restriction for capturing one screen > worth of data . . . but the task you've cited sounds like a > job for high speed data acquisition. One of my favorite tools of > yesteryear was a product by Base2 Electronics that ran off > the extended performance parallel port of a Win95 machine. > It would take 8, 12-bit samples 1000 times a second and throw > the numbers to a column delimited text file on the hard drive. > > If I tied all 8 channels together, I could get 8000 samples > per second. I successfully chased a lot of gremlins out of > Beechjets with this tool. Unfortunately, the company didn't > upgrade to stay compatible with newer hardware and operating > systems and I've not found a single product that even approaches > the capability and low cost of that device ($125 with software). > > I've discussed this project with my software guy (father-in-law) > and we're going to see if we can do a WinXP/USB version of this > product. In the mean time, I don't have any good recommendations > for you. If I run across something, I'll post it. Hmmm, got > an old laptop you could load Win95 on and has an EPP parallel > port? I think my Base2 Modules are laying around here somewhere. > > I'm going to add a diode to the schematic for the OVPM > this weekend. Thanks for doing the legwork on this! > > Bob . . . > > ________________________________ Message 5 _____________________________________ Time: 07:00:17 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: School stuff --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 08:45 AM 4/13/2006 -0700, you wrote: >--> AeroElectric-List message posted by: Brian Lloyd > > >Sorry for getting so far afield. Back to electrical systems. No apologies are due. I sincerely hope that folks who attend to this List understand that the future of our craft, indeed the future of the country is dependent upon the ability of honorable citizens to discover and exploit simple-ideas. This is a cradle to grave process of education wherein everyone is constantly presented with opportunities to be teachers and students. While specific topics here on the List focus on things electric, the foundations upon which learning takes place are illustrated and demonstrated by many examples from a variety of disciplines. I appreciate anyone's citations of examples where good learning takes place. It it contributes to our collective toolbox. I've oft suggested that knowledge is the only commodity that grows in value the more it is exchanged amongst those who use it in honorable ways. E.g., if one had a cure for cancer, it stands to reason that the greatest benefit happens when the greatest numbers of users have the knowledge. Bob . . . ________________________________ Message 6 _____________________________________ Time: 07:28:02 AM PST US From: Gilles Thesee Subject: Re: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: Gilles Thesee >> Any idea how to work around this problem ? >> > > The usual approach is to take the device to the RF > lab to research the propagation mode for noise > and then deduce mitigation techniques. It's exceedingly > difficult to offer specific recommendations > without putting one's hands on the hardware > and probing it's characteristics with the > appropriate tools. > > The broad-brush advice would include things > like shielded enclosures and filtered penetrations > for wires. However, one needs to be mindful of > possible deleterious effects of filters > on proper operation of the system. He could > try ferrite beads on the leads, and enclosing > all the electronics in a metal box. > Bob, Thank you for your quick answer. I'm passing it on to him. Regards, Gilles Thesee Grenoble, France http://contrails.free.fr ________________________________ Message 7 _____________________________________ Time: 07:33:49 AM PST US Subject: AeroElectric-List: antenna construction From: Dj Merrill --> AeroElectric-List message posted by: Dj Merrill Hi all, I'm sure I ran across a web site with information on constructing your own antennas for aircraft use (wingtip and/or inside a fiberglass fuselage). I can't seem to find the site, though. Anyone have a lead on this? Thanks, -Dj -- Dj Merrill - N1JOV Sportsman 2+2 Builder #7118 http://econ.duke.edu/~deej/sportsman/ "TSA: Totally Screwing Aviation" ________________________________ Message 8 _____________________________________ Time: 07:51:49 AM PST US From: Mickey Coggins Subject: Re: AeroElectric-List: School stuff --> AeroElectric-List message posted by: Mickey Coggins >>Sorry for getting so far afield. Back to electrical systems. > > > No apologies are due. I sincerely hope that > folks who attend to this List understand that the > future of our craft, indeed the future of the country > is dependent upon the ability of honorable citizens > to discover and exploit simple-ideas. I'd even say the future of our world! :-) -- Mickey Coggins http://www.rv8.ch/ #82007 finishing do not archive ________________________________ Message 9 _____________________________________ Time: 07:58:29 AM PST US From: "Dave Morris \"BigD\"" Subject: Re: AeroElectric-List: antenna construction --> AeroElectric-List message posted by: "Dave Morris \"BigD\"" If your fuselage is composite and has the requisite inside diameter, you can take advantage of a loop antenna design that has gain, lower noise, and requires no ground plane: www.DaveMorris.com/MorrisComLoop Dave Morris At 09:30 AM 4/15/2006, you wrote: >--> AeroElectric-List message posted by: Dj Merrill > >Hi all, > I'm sure I ran across a web site with information on >constructing your own antennas for aircraft use (wingtip >and/or inside a fiberglass fuselage). I can't seem to find >the site, though. Anyone have a lead on this? > >Thanks, > >-Dj > >-- >Dj Merrill - N1JOV >Sportsman 2+2 Builder #7118 >http://econ.duke.edu/~deej/sportsman/ > >"TSA: Totally Screwing Aviation" > > ________________________________ Message 10 ____________________________________ Time: 08:07:09 AM PST US From: "Alan K. Adamson" Subject: RE: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: "Alan K. Adamson" One note about HID's, they are a High voltage type light, and the "starter" and "ballast" use a pulse mechanism to start them and then keep them lit. It usually provides 50-80V to the lamp its self, but at very low current. The eletronics use some form of "step up" converter, They usually call these things "boost pumps" because they cycle at a very fast rate (creating EMI, RFI) to create the additional voltage required. If the Ballast is not "shielded" then you are asking for this type of interference. Is the Ballast plastic or metal? Alan -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gilles Thesee Sent: Saturday, April 15, 2006 10:26 AM Subject: Re: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: Gilles Thesee --> >> Any idea how to work around this problem ? >> > > The usual approach is to take the device to the RF > lab to research the propagation mode for noise > and then deduce mitigation techniques. It's exceedingly > difficult to offer specific recommendations > without putting one's hands on the hardware > and probing it's characteristics with the > appropriate tools. > > The broad-brush advice would include things > like shielded enclosures and filtered penetrations > for wires. However, one needs to be mindful of > possible deleterious effects of filters > on proper operation of the system. He could > try ferrite beads on the leads, and enclosing > all the electronics in a metal box. > Bob, Thank you for your quick answer. I'm passing it on to him. Regards, Gilles Thesee Grenoble, France http://contrails.free.fr ________________________________ Message 11 ____________________________________ Time: 08:37:54 AM PST US From: Charlie England Subject: Re: AeroElectric-List: RE: Avionics=Black Art --> AeroElectric-List message posted by: Charlie England Impossible to give an answer to the specific question without seeing the diagrams for the products, but the general answer is this: If the shield is nothing but a shield, it probably should be grounded at only one end. The most obvious example is the shield on a magneto P-lead. If the shield is actually the ground return for the circuit (common occurrence for audio & RF antennas) then it must be *connected* at both ends, which isn't necessarily the same as being *grounded* at both ends. The most obvious example for this is headset & mic wiring to the intercom or radio. In those cases, the shield is also the ground return for the mic & headphones, so must be connected to both the intercom & the jack, but it must *not* be *grounded* at the jack; that's why you are instructed to use insulating washers on the jacks. This is where the ground loop can show up, when there would be 2 paths for the return current to follow: the shield line & the airframe. (hope that didn't just stir up more mud in the water...) Mark & Lisa wrote: >--> AeroElectric-List message posted by: "Mark & Lisa" > >Angier, > >I've taken the liberty of forwarding your question to the AeroElectric-List >on the Matronics list server. This list is moderated by Bob Nuckolls and >read by many 'lectric-smart people (I'm a reader, but not one of the >'lectric-smart ones). Hopefully someone there can answer your question, and >you might consider joining the list -- lots of good info there. > >Regards, > >Mark & Lisa Sletten >Legacy FG N828LM >http://www.legacyfgbuilder.com > > > >>-----Original Message----- >>From: Greenbacks, Ltd. [mailto:N4ZQ@comcast.net] >>Sent: Friday, April 14, 2006 23:23 >>Subject: Re: Avionics=Black Art >> >> >>Before igniting a spirited discussion on the subject of wiring a >>panel, I'll cheerfully disclose that I have no formal training and >>have a hard time trying to explain how an electron moves from one >>place to another. This said, how do we resolve an apparent conflict. >>The technical wizards at Garmin say in no uncertain terms that with >>shielded cables (comm primarily) the shield must be grounded at both >>ends. Other technical wizards at L3/Goodrich Avionics(WX500 >>Stormscope) are adamant that shielded cables (Tx/Rx) must only be >>grounded at one end. In the case of the Wx500 talking the the MX20, >>the Tx cable is to the shielded at the processor end only and the Rx >>cable shielded at the MX20 end only. Never mind the fact that the >>WX500 install manual calls out for these cables to be shielded at >>both ends. >> >>I suspect there may be a ground loop potential in here somewhere and >>would welcome feedback from anyone one on the list who actually makes >>a living do'in this stuff day to day. >> >>I've got the WX500 up and running on the bench and haven't blown the >>thing up yet so maybe there's hope. ): >> >>Angier Ames >>N4ZQ >>N3ZQ >> ________________________________ Message 12 ____________________________________ Time: 08:39:44 AM PST US From: guy fulton Subject: Re: AeroElectric-List: OVM nuisance trips during engine start --> AeroElectric-List message posted by: guy fulton ndiswrapper was originally written for pcmcia cards using the windows drivers .inf to provide windows speific hardware full function in linux. ndiswrapper found to provide function to other types of hardware, serial, parallel, usb, in linux. I have successfully used it many times, using wine for graphical interface. No more than a suggestion. guy --- Brian Lloyd wrote: > --> AeroElectric-List message posted by: Brian Lloyd > > > > > guy fulton wrote: > > --> AeroElectric-List message posted by: guy > fulton > > > > Chances are if the program runs in W95 you will be > > successful running it in linux, using wine. > > Not if you are dealing with drivers and hardware it > won't. > > -- > Brian Lloyd 361 Catterline > Way > brian-yak at lloyd dot com Folsom, CA 95630 > +1.916.367.2131 (voice) +1.270.912.0788 > (fax) > > I fly because it releases my mind from the tyranny > of petty things . . . > - Antoine de Saint-Exupery > > > > > browse > Subscriptions page, > FAQ, > http://www.matronics.com/Navigator?AeroElectric-List > > > Admin. > > > > > > > > > > > ________________________________ Message 13 ____________________________________ Time: 10:09:09 AM PST US From: Gilles Thesee Subject: Re: AeroElectric-List: Radio noise with HID lights --> AeroElectric-List message posted by: Gilles Thesee Alan K. Adamson a crit : > --> AeroElectric-List message posted by: "Alan K. Adamson" > > One note about HID's, they are a High voltage type light, and the "starter" > and "ballast" use a pulse mechanism to start them and then keep them lit. > It usually provides 50-80V to the lamp its self, but at very low current. > > The eletronics use some form of "step up" converter, They usually call these > things "boost pumps" because they cycle at a very fast rate (creating EMI, > RFI) to create the additional voltage required. If the Ballast is not > "shielded" then you are asking for this type of interference. Is the > Ballast plastic or metal? > > Alan, Thank you for your input. I don't know what my buddy's ballast case is made of. Il ask him. Regards, Gilles Thesee Grenoble, France http://contrails.free.fr ________________________________ Message 14 ____________________________________ Time: 12:20:06 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: RE: DIY data acquisition (DAS) systems --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 08:37 PM 4/14/2006 -0400, you wrote: >--> AeroElectric-List message posted by: "Alan K. Adamson" > > >Looking for a Cheap 10 or 12 bit ADC, the "starter kits" from here are >pretty good. 4 channel I think and as you described, work on a serial >port... Also think they have a USB version > >http://www.dataq.com/ > >Alan There are a LOT of very capable products on the market for gathering and storing data into computers. The one Alan cited is an up-and-comer. One of my personal favorites for 6-7 years has been . . . http://weedtech.com/ I have about a dozen of his various modules on the shelf and they've been exceedingly handy for getting a system assembled quickly. Here's an example of a multi-channel temperature, voltage and current measuring system along with some remote control features I crafted a few years ago with Weeder Tech modules: http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_1.jpg http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_2.jpg http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_3.jpg http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_4.jpg http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_5.jpg http://www.aeroelectric.com/Pictures/Tools/DAS/Weedtech_DAS_6.jpg This sat out in the unheated nose of a Beechjet. In pictures 5 and 6 you can just see portions of power resistors bolted to the base plate that were used as heaters (under software control of the same program that runs the DAS) that kept innards of the enclosure above -10C. This and MANY similar products are really good for gathering data relatively sedate rates. In this case, one measurement per second. The problem Ken is chasing requires much faster sampling rates. Probably 100/sec minimum, 500-1000 would be really good. There aren't too many products out there in the $100 class that will run that fast. That's the product class we're brainstorming about right now. Bob . . . ________________________________ Message 15 ____________________________________ Time: 12:27:52 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: DAS Systems --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 05:50 PM 4/14/2006 -0700, you wrote: >--> AeroElectric-List message posted by: Brian Lloyd > >Robert L. Nuckolls, III wrote: > > I've discussed this project with my software guy (father-in-law) > > and we're going to see if we can do a WinXP/USB version of this > > product. In the mean time, I don't have any good recommendations > > for you. If I run across something, I'll post it. Hmmm, got > > an old laptop you could load Win95 on and has an EPP parallel > > port? I think my Base2 Modules are laying around here somewhere. > >How about doing it in such a way that it is universal. It is a small >thing but as soon as you say WinXP/USB I know that it will not run on >any of my computers (Mac, Sun, Linux/Intel). Win/USB is the major market . . . and FTDI's drivers for making USB masquerade as a serial COM port are getting better all the time. I have one product right now that's been a real hassle when customers want to put it on a Win95 or even Windows for Workgroups! It's a shoo-in on XP and 2000. The biggest filter of operating systems will be a GUI we'll provide which will be crafted for the latest Win OS and how ever far back as we can make it go without undue labor. However, the communications architecture will be open and anyone who want's to craft their own interface. It's usually no big deal to take a series of streaming data and push it to a hard drive for later import to spread-sheet-and-graphics of choice. The DAS will put out ASCII integers in comma de-limited strings. >You know, if you give it some intelligence and then put it on the >network you end up with some seriously cool remote data collection. Now >with it being on the other side of an IP connection you can write a Java >front-end that will run on anything. This needs to be a $100 gizmo. My #2 software guy is working with some I.P. address based hardware and development tools, we'll see what he comes up with. Obviously, that's the wave of the future. I'm going to be working with folks in flight test evaluating some quick-n-dirty installations of DAS systems where we'll try an 802.11b wireless link. At the moment, these are much bulkier and more expensive than I'd like to offer to my target market: OBAM aircraft. Bob . . . ________________________________ Message 16 ____________________________________ Time: 12:27:52 PM PST US From: Sid Hausding Subject: AeroElectric-List: newbie with question --> AeroElectric-List message posted by: Sid Hausding Would like to have some 12vdc, 15mamp LED indicator lights to show my circuit breakers are working.......how do I put the lights into each circuit off the individual systems without burning the lights out at full battery power or alternator output? Must be some kind of capacitor or resistor to reduce the power to each light? And if so, how to determine which kind and what size? I will have seven breakers in a row and want the lites over the top of the individual breakers. Thanking everyone in advance for any assistance to get me up and running..........just joined the aeroelectric forum today. Hausding, Sid Avid Speedwing N204S Alpena, Mi 49707 avidsid@yahoo.com "Why can't we all just get along?" --------------------------------- ________________________________ Message 17 ____________________________________ Time: 12:55:42 PM PST US From: James Freeman Subject: AeroElectric-List: Troubleshooting ANR headset wierdness --> AeroElectric-List message posted by: James Freeman I have a question for the hive mind. I recently got around to adding the LEMO/Redel/Bose jacks for headsets in my RV-8. The airplane was (and still is) wired for stereo with standard jacks and a PS Engineering intercom. The standard jacks work well. My old Bose Series II ANR headset works fine plugged into the standard jacks and using its adaptor and battery pack. After discussing with the Bose tech support whether I should wire into the existing jacks or all the way back to the intercom, they said it didn't matter, so I took the easy way out and wired to the existing jacks. When I plug the headset into the 6-pin ANR connector, all is well (good audio, good mike sidetone, etc.) until I turn the ANR on. With the ANR turned on, I lose audio in the right earpiece (ANR itself seems to work fine). The headset works normally when plugged into the standard connectors (through its adaptor) and battery pack, ANR and all. All the connections seem to ohm out properly, although I have been known to miswire things in the past. The relevant wiring diagram can be found here on page 18: bose.com/pdf/customer_service/owners/og_headset_x.pdf TIA James Freeman ________________________________ Message 18 ____________________________________ Time: 01:42:48 PM PST US From: Kevin Horton Subject: Re: AeroElectric-List: antenna construction --> AeroElectric-List message posted by: Kevin Horton On 15 Apr 2006, at 10:30, Dj Merrill wrote: > --> AeroElectric-List message posted by: Dj Merrill > > Hi all, > I'm sure I ran across a web site with information on > constructing your own antennas for aircraft use (wingtip > and/or inside a fiberglass fuselage). I can't seem to find > the site, though. Anyone have a lead on this? http://www.rst-engr.com/ Kevin Horton RV-8 (finishing kit) Ottawa, Canada http://www.kilohotel.com/rv8 ________________________________ Message 19 ____________________________________ Time: 02:01:16 PM PST US From: "B Tomm" Subject: RE: AeroElectric-List: newbie with question --> AeroElectric-List message posted by: "B Tomm" Welcome to the group. Since no one has answered this one yet, I'll take a stab at it. Put a small (current limiting) resistor in series with the LED. This arrangement will light the LED whenever the fuse is seeing power (+12V) i.e.: fuse is in and not blown (assuming of course that the other end of the circuit is adequately connected to ground.) I wouldn't think the value of the resistor is critical if using standard low current LEDs. 1000 ohm (brown, black, red, gold or silver) is common (in my experience) and a good starting point. The LED is polarity sensitive but not destructive if you wire it in backwards. So if the circuit doesn't work, try turning the LED around. Sometimes the LEDs indicate polarity with a flat spot or lead length. So only proceed with soldering once you figure out the correct orientation on the test bench. Good luck. Worth exactly what you paid for it. Use at your own risk. Bevan RV7A finishing kit -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Sid Hausding Sent: Saturday, April 15, 2006 12:26 PM Subject: AeroElectric-List: newbie with question --> AeroElectric-List message posted by: Sid Hausding --> Would like to have some 12vdc, 15mamp LED indicator lights to show my circuit breakers are working.......how do I put the lights into each circuit off the individual systems without burning the lights out at full battery power or alternator output? Must be some kind of capacitor or resistor to reduce the power to each light? And if so, how to determine which kind and what size? I will have seven breakers in a row and want the lites over the top of the individual breakers. Thanking everyone in advance for any assistance to get me up and running..........just joined the aeroelectric forum today. Hausding, Sid Avid Speedwing N204S Alpena, Mi 49707 avidsid@yahoo.com "Why can't we all just get along?" --------------------------------- ________________________________ Message 20 ____________________________________ Time: 02:35:48 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: DAS systems --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" Funny thing that this topic was fresh on the List. I just got an e-mail notice from another of my favorite DAS hardware suppliers that points me to another of their $hundred$ wonders. See: http://www.labjack.com/labjack_u3.html Except for very demanding speeds, this critter is the one to beat . . . and it isn't going to be me that does it! I've ordered one to play with. Bob . . . < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss > ________________________________ Message 21 ____________________________________ Time: 06:09:02 PM PST US From: "Lee Logan" Subject: AeroElectric-List: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 --> AeroElectric-List message posted by: "Lee Logan" I believe there are small incandescent bulbs that (reportedly) reliably emulate the color mix and spectrum of sunlight. I don't know if anyone has come up with an LED that does that as well. I was wondering if anyone has put such a light in position or on a gooseneck fixture that would allow it to illuminate a PDA or tablet used for moving map/navigation, etc. My HP PDA is actually at its most readable in direct sunlight. It's when it's up under instrument cowling, it can be difficult to see map details on it. I was hoping to use a tablet PC (Motion or similar) fixed permanently in the center of my panel with one of the currently available nav software packages (Anywheremap, etc.) as my primary, large screen, navigation system. If such a light could be positioned where it would cast "sunlight" on the tablet screen, it might be a near all around answer regardless of heading and the position of the "actual" sun. What am I missing here, if anything?? Regards, Lee... ________________________________ Message 22 ____________________________________ Time: 06:56:23 PM PST US From: Brian Lloyd Subject: Re: AeroElectric-List: Re: DAS Systems --> AeroElectric-List message posted by: Brian Lloyd Robert L. Nuckolls, III wrote: > Win/USB is the major market . . . and FTDI's drivers for making > USB masquerade as a serial COM port are getting better all the > time. I have one product right now that's been a real hassle > when customers want to put it on a Win95 or even Windows for > Workgroups! It's a shoo-in on XP and 2000. Well, you are talking to someone who has spent most of his life making devices and services universally available over the network. There is a reason people have embraced the Internet; it is the universal vehicle for communication between devices. > The biggest filter of operating systems will be a GUI we'll > provide which will be crafted for the latest Win OS and how ever > far back as we can make it go without undue labor. However, > the communications architecture will be open and anyone who > want's to craft their own interface. It's usually no big deal > to take a series of streaming data and push it to a hard drive > for later import to spread-sheet-and-graphics of choice. The > DAS will put out ASCII integers in comma de-limited strings. For the GUI, use Java. The reason is, you really will be able to run it on windows, Mac, or any of the flavors of Unix/Linux out there. It has all the hooks to allow you to communicate over a network connection regardless of whether it is serial RS-232 (PPP), ethernet, USB, Firewire, Bluetooth, or WiFi (IEEE 802.11[a|b|g]). >> You know, if you give it some intelligence and then put it on the >> network you end up with some seriously cool remote data collection. Now >> with it being on the other side of an IP connection you can write a Java >> front-end that will run on anything. > > This needs to be a $100 gizmo. My #2 software guy is working > with some I.P. address based hardware and development tools, we'll > see what he comes up with. Obviously, that's the wave of > the future. Back when I started out building routers and network communications devices back in the late '80s it was the wave of the future. Now it is the wave of the present. And to make it easier, go look at the Embedded Java vendors. I was using the Dallas Semiconductor "Tini" board. It costs about $50 but is a complete network computer for sensor data collection including processor, memory, network connection (ethernet), programming language (Java), libraries, etc. It has all the basic features to do what you want to do including the availability of a web server right on the Tini board. Heck, do your data collection right on the board and have it available via the net immediately. No muss, no fuss, and no special software for the PC that you are using to look at the data. See: http://www.maxim-ic.com/TINIplatform.cfm It already has ethernet, serial, CAN2.0b bus, 1-Wire sensor bus, etc. This is how I would start. > I'm going to be working with folks in flight > test evaluating some quick-n-dirty installations of DAS systems > where we'll try an 802.11b wireless link. At the moment, > these are much bulkier and more expensive than I'd like to > offer to my target market: OBAM aircraft. I happen to be talking with an aircraft manufacturer on something similar, basically data linking data collection in the aircraft to the ground using 802.11. It is fairly easy to get ranges of a couple of miles using 802.11 but mostly I am setting it up to do an automatic data-dump whenever the aircraft comes within range of the base station. I would be happy to help you on your project if you like. -- Brian Lloyd 361 Catterline Way brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery ________________________________ Message 23 ____________________________________ Time: 07:01:52 PM PST US From: "Alan K. Adamson" Subject: RE: AeroElectric-List: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 --> AeroElectric-List message posted by: "Alan K. Adamson" Don't know if this has been posted before or not, but this place has just about every LED imaginable and then some. As for LED's on a gooseneck, the RV guys do it all the time. They buy the cheap USB flex lights and clip off the connector, add a resistor and mount it with an adel clamp on the side of the canopy or fuselage. Alan -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Lee Logan Sent: Saturday, April 15, 2006 8:52 PM Subject: AeroElectric-List: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 --> AeroElectric-List message posted by: "Lee Logan" --> I believe there are small incandescent bulbs that (reportedly) reliably emulate the color mix and spectrum of sunlight. I don't know if anyone has come up with an LED that does that as well. I was wondering if anyone has put such a light in position or on a gooseneck fixture that would allow it to illuminate a PDA or tablet used for moving map/navigation, etc. My HP PDA is actually at its most readable in direct sunlight. It's when it's up under instrument cowling, it can be difficult to see map details on it. I was hoping to use a tablet PC (Motion or similar) fixed permanently in the center of my panel with one of the currently available nav software packages (Anywheremap, etc.) as my primary, large screen, navigation system. If such a light could be positioned where it would cast "sunlight" on the tablet screen, it might be a near all around answer regardless of heading and the position of the "actual" sun. What am I missing here, if anything?? Regards, Lee... ________________________________ Message 24 ____________________________________ Time: 07:23:59 PM PST US From: "Alan K. Adamson" Subject: RE: AeroElectric-List: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 --> AeroElectric-List message posted by: "Alan K. Adamson" Opps, helps if you post the link... http://www.ledtronics.com/ Alan - sorry -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Alan K. Adamson Sent: Saturday, April 15, 2006 9:59 PM Subject: RE: AeroElectric-List: Re: AeroElectric-List Digest: 16 Msgs - 04/14/06 --> AeroElectric-List message posted by: "Alan K. Adamson" --> Don't know if this has been posted before or not, but this place has just about every LED imaginable and then some. As for LED's on a gooseneck, the RV guys do it all the time. They buy the cheap USB flex lights and clip off the connector, add a resistor and mount it with an adel clamp on the side of the canopy or fuselage. Alan ________________________________ Message 25 ____________________________________ Time: 08:50:33 PM PST US From: Sid Hausding Subject: AeroElectric-List: - 04/14/06 --> AeroElectric-List message posted by: Sid Hausding Wondering if all LED's come with a built in current limiting device or if most will need to have a resistor wired in line to keep the small power requirements they use from burning out.........any info posted somewhere on wiring in a 15mamp, 12dcv device to show power to the system is there? Sid -------------------- "Alan K. Adamson" wrote: --> AeroElectric-List message posted by: "Alan K. Adamson" Opps, helps if you post the link... http://www.ledtronics.com/ Don't know if this has been posted before or not, but this place has just about every LED imaginable and then some. "Why can't we all just get along?" ---------------------------------