---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 02/27/13: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:29 AM - Re: trouble with building Contactor 'Cooler' duty controller (Yahoo hasbroucka) 2. 08:39 AM - Re: Eye Beam Mini LED / RF interference (jonlaury) 3. 09:38 AM - Re: Re: Eye Beam Mini LED / RF interference (Robert L. Nuckolls, III) 4. 03:17 PM - Re: trouble with building Contactor 'Cooler' duty controller (Jan) 5. 03:34 PM - Re: trouble with building Contactor 'Cooler' duty controller (Robert L. Nuckolls, III) 6. 03:56 PM - Speakers for helmet installation (Richard Girard) 7. 05:30 PM - Re: Speakers for helmet installation (Charlie England) ________________________________ Message 1 _____________________________________ Time: 06:29:36 AM PST US From: "Yahoo hasbroucka" Subject: RE: AeroElectric-List: trouble with building Contactor 'Cooler' duty controller The link is http://tinyurl.com/bolkoyc The list posts are: Post subject: Latching Relay Redux Alan , HasbrouckA@yahoo.com SeaRey Amphibian, framework and hull assembled (not covered). Working on VFR avionics and wiring (Dynon Skyview full suite). Top Priority is keep it light, and place weight forward! -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jan Sent: Tuesday, February 26, 2013 11:53 PM Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler' duty controller What is the link to the circuit please - I have been looking on your web site but not able to find it All the best Jan On Feb 27, 2013, at 3:06, "Robert L. Nuckolls, III" wrote: At 11:12 AM 2/26/2013, you wrote: I?m building a SeaRey Rotax 914, and am close on alternator amperage output. After reviewing archives I have now attempted to construct Bob?s ?Contactor Cooler?. I am very weak on electronics knowledge, but for the $20 investment, I gave it a shot. I noticed that Caps come is different ratings and materials of construction, and for this stage of the experiment I decided to ignore this and simply purchase the uf ratings as listed on the schematic. Do the voltage ratings or materials of construction matter to this device? Not especially. Anything over 12v works. I finished assembly today, and noticed that I did not purchase any iN400X diodes (I assume the X could be any available #?) I recognized the 400X as voltage spike protection for avionics, so I decided to proceed without a diode across the contactor coil. No, the 'x' means don't care. Any number from 0 to 9 is suited to the task. The device worked for three cycles, about 5 seconds each, and simply no longer operates the contactor. There was no smoke and no detectable warmth. I suspect that the missing diode allowed the coil V-spike to damage my assembly? That's a fair assumption. What does the contactor do? If your IRF510 is shorted, the contactor will simply pull in at full voltage. I suspect that this is what's happening. Give us a voltage measurement on your contactor coil when the device is powered up. Also a voltage measurement at pin 3 of the 555 say 10 seconds after the device is powered up. If so, can anyone tell me which device is most likely to need replacement? (timer, transistor, diodes, resistors or caps) Not knowing much of electronics, I only know how to test the resistors and diodes, but this is complicated by lack of isolation. As Lord Kelvin opined many years ago: ?When you can measure what you are speaking about, and express it in numbers, you know something about it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts advanced to the stage of science.? Let's get the numbers. By the way, thanks for taking this project on. Let's make sure the outcome expands your knowledge and the utility of your airplane. Bob . . . ________________________________ Message 2 _____________________________________ Time: 08:39:19 AM PST US Subject: AeroElectric-List: Re: Eye Beam Mini LED / RF interference From: "jonlaury" Joe, Not sure if the the little eyeball sold by VAn's (and Spruce) is incandescent, but the light output compared to the EB Mini is like comparing a match to the sun. The EB also is dimmable. The little eyeball needs to be fairly close to the target to provide meaningful light, but they are inexpensive and smaller. John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=395192#395192 ________________________________ Message 3 _____________________________________ Time: 09:38:23 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Eye Beam Mini LED / RF interference At 10:36 AM 2/27/2013, you wrote: > >Joe, >Not sure if the the little eyeball sold by VAn's (and Spruce) is >incandescent, but the light output compared to the EB Mini is like >comparing a match to the sun. The EB also is dimmable. The little >eyeball needs to be fairly close to the target to provide meaningful >light, but they are inexpensive and smaller. Those were originally incandescent. They would no doubt benefit from an LED upgrade. some builders have ordered red or white LED fixtures from our website https://matronics.com/aeroelectric/Catalog/9002-100-5s.jpg One of these mounted on both sides of the canopy frame were used to flood the panel on RV3/4/8 projects. They proved to be bright enough . . . in fact needed to be dimmed for navigation in full darkness. Bob . . . ________________________________ Message 4 _____________________________________ Time: 03:17:24 PM PST US From: Jan Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler' duty controller Thanks ! Do you know how much electrical noise this circuit generates ? All the best Jan On Feb 27, 2013, at 22:25, Yahoo hasbroucka wrote: > The link is http://tinyurl.com/bolkoyc > > The list posts are: Post subject: Latching Relay Redux > > Alan , > HasbrouckA@yahoo.com > SeaRey Amphibian, framework and hull assembled (not covered). Working on V FR avionics and wiring (Dynon Skyview full suite). Top Priority is keep it l ight, and place weight forward! > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelect ric-list-server@matronics.com] On Behalf Of Jan > Sent: Tuesday, February 26, 2013 11:53 PM > To: > Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler' d uty controller > > What is the link to the circuit please - I have been looking on your web s ite but not able to find it > > All the best > > Jan > > On Feb 27, 2013, at 3:06, "Robert L. Nuckolls, III" wrote: > >> At 11:12 AM 2/26/2013, you wrote: >> >> I?m building a SeaRey Rotax 914, and am close on alternator amperage outp ut. After reviewing archives I have now attempted to construct Bob?s ?Contac tor Cooler?. I am very weak on electronics knowledge, but for the $20 invest ment, I gave it a shot. >> >> I noticed that Caps come is different ratings and materials of constructi on, and for this stage of the experiment I decided to ignore this and simply purchase the uf ratings as listed on the schematic. Do the voltage ratings o r materials of construction matter to this device? >> >> Not especially. Anything over 12v works. >> >> >> I finished assembly today, and noticed that I did not purchase any iN400X diodes (I assume the X could be any available #?) I recognized the 400X as v oltage spike protection for avionics, so I decided to proceed without a diod e across the contactor coil. >> >> No, the 'x' means don't care. Any number from >> 0 to 9 is suited to the task. >> >> >> The device worked for three cycles, about 5 seconds each, and simply no l onger operates the contactor. There was no smoke and no detectable warmth. >> >> I suspect that the missing diode allowed the coil V-spike to damage my as sembly? >> >> That's a fair assumption. What does the contactor do? >> If your IRF510 is shorted, the contactor will simply >> pull in at full voltage. I suspect that this is what's >> happening. Give us a voltage measurement on your contactor >> coil when the device is powered up. Also a voltage >> measurement at pin 3 of the 555 say 10 seconds after >> the device is powered up. >> >> >> >> If so, can anyone tell me which device is most likely to need replacement ? (timer, transistor, diodes, resistors or caps) Not knowing much of electro nics, I only know how to test the resistors and diodes, but this is complica ted by lack of isolation. >> >> As Lord Kelvin opined many years ago: >> ?When you can measure what you are speaking about, and express it in numb ers, you know something about it, when you cannot express it in numbers, you r knowledge is of a meager and unsatisfactory kind; it may be the beginning o f knowledge, but you have scarcely, in your thoughts advanced to the stage o f science.? >> >> Let's get the numbers. By the way, thanks >> for taking this project on. Let's make sure >> the outcome expands your knowledge and the >> utility of your airplane. >> >> >> >> >> Bob . . . >> >> >> >> > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 5 _____________________________________ Time: 03:34:05 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler' duty controller At 05:15 PM 2/27/2013, you wrote: >Thanks ! Do you know how much electrical noise this circuit generates ? > >All the best Should be tolerably low. It won't have any radio frequency issues and conducted audio frequency noise onto bus is very low compared with other noises (like alternator ripple). Bob . . . ________________________________ Message 6 _____________________________________ Time: 03:56:03 PM PST US Subject: AeroElectric-List: Speakers for helmet installation From: Richard Girard All, I fly a trike wearing a full face Shoei helmet. While the helmet doesn't seal my ears like headphones it does cut down the noise considerably. It also cuts out my ability to hear my radio so I want to put speakers and a small mic in the helmet. I did this once before cannabalizing a Cobra VOX family radio for hang gliding. I don't want to cannabalize my David Clarks this time so the speakers and mic will be compatible with my hand held (a Vertex). Mouser has lots of mylar diaphragm speakers of the right size and depth. Can anyone recommend a particular speaker or mic cartridge that has worked for you? Rick Girard Do not archive -- Zulu Delta Mk IIIC Thanks, Homer GBYM It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ________________________________ Message 7 _____________________________________ Time: 05:30:51 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Speakers for helmet installation On 02/27/2013 05:55 PM, Richard Girard wrote: > All, I fly a trike wearing a full face Shoei helmet. While the helmet > doesn't seal my ears like headphones it does cut down the noise > considerably. It also cuts out my ability to hear my radio so I want > to put speakers and a small mic in the helmet. I did this once before > cannabalizing a Cobra VOX family radio for hang gliding. I don't want > to cannabalize my David Clarks this time so the speakers and mic will > be compatible with my hand held (a Vertex). Mouser has lots of mylar > diaphragm speakers of the right size and depth. Can anyone recommend a > particular speaker or mic cartridge that has worked for you? > > Rick Girard > Do not archive > > -- > Zulu Delta > Mk IIIC > Thanks, Homer GBYM > For the earphones, have you tried a pair of stereo 'ear buds'? It would be pretty simple to try, with a 1/4" to 1/8" adapter. I've used a couple of different types with a regular aircraft radio/intercom, & they worked fine without any impedance matching devices. A pair of these under an el-cheapo noise canceling headset (plug in the ear buds & leave the headset phone plug 'loose') makes an incredibly quiet environment. For a while, Plantronics made a little gaming headset consisting of ear buds with a tiny boom mic off one of the buds. I've got a couple of pairs, & they work with a/c radios/intercoms except for the problem of the mic boom being too short to get the mic directly in front of your lips. You could probably cannibalize a regular gaming headset to get a mic, and the earphones too, if you want regular over-the-ear style instead of in-ear. Ebay & Amazon have hundreds of choices. Many are so inexpensive that the entire headset costs less than what a/c headset makers want to charge for just a replacement mic cartridge. The impedance matching issue is often a non-issue, due to the typically low output impedance in any device made within the last couple of decades. 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