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#1
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Nav lights/switching power supplies
Jim Weir..the articles in Kitplanes on subject didn't discuss noise
generation from the oscillator cycling output voltage to LEDs. Is there a noise filter requirement to minimize disruption of radio operation? |
#2
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Nav lights/switching power supplies
It all depends on how you build it. And, in the end, remember that big long
12-letter word that we stencil onto a homebuilt aircraft. Jim -- "It is the mark of an educated mind to be able to entertain a thought without accepting it." --Aristotle wrote in message ... Jim Weir..the articles in Kitplanes on subject didn't discuss noise generation from the oscillator cycling output voltage to LEDs. Is there a noise filter requirement to minimize disruption of radio operation? |
#3
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Nav lights/switching power supplies
On Nov 5, 10:15*am, "RST Engineering" wrote:
It all depends on how you build it. *And, in the end, remember that big long 12-letter word that we stencil onto a homebuilt aircraft. Jim -- "It is the mark of an educated mind to be able to entertain a thought without accepting it." * * * * --Aristotle wrote in message ... Jim Weir..the articles in Kitplanes on subject didn't discuss noise generation from the oscillator cycling output voltage to LEDs. *Is there a noise filter requirement to minimize disruption of radio operation?- Hide quoted text - - Show quoted text - Jim, Sorry, I didn't see "It all depends on how you build it" in the "Design Notes" section of the last article. In the August issue of Kitplanes you mention a linear regulator article as a resource-- "Sarangan Article"--but identified the complications of that system. Sarangan, in his article, stated there are problems with noise generation with switching power supplies and that is why he chose his path. It seems, maybe, noise problems should have been at least mentioned in your article. Another title possibility--"My EXPERIMENTAL switching power supply". |
#4
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Nav lights/switching power supplies
A. A magazine article is not a technical journal. Switching power supplies
CAN have noise. Linear power supplies CAN oscillate. There are no "Design Notes" in ANY of my articles; you are expected to have at least a passing knowledge of the art. B. Sarangen said that there are problems with noise generation in switchers and it is general knowledge in the electronics industry that this is so. I didn't see in Mr. Sarangen's "Design Notes" how he tested a switcher in his application and what his conclusions were with any conceivable permutation of avionics. However, there are noise problems with ANYTHING that generates a signal, all the way from any nav or com radio that was ever made, GPS, Loran, and the whole spectrum of electronic devices. C. As to putting "Experimental" in the title of the article, would you once again tell me what magazine you saw the article in? Did that give you a passing clue? Jim -- "It is the mark of an educated mind to be able to entertain a thought without accepting it." --Aristotle Jim, Sorry, I didn't see "It all depends on how you build it" in the "Design Notes" section of the last article. In the August issue of Kitplanes you mention a linear regulator article as a resource-- "Sarangan Article"--but identified the complications of that system. Sarangan, in his article, stated there are problems with noise generation with switching power supplies and that is why he chose his path. It seems, maybe, noise problems should have been at least mentioned in your article. Another title possibility--"My EXPERIMENTAL switching power supply". |
#5
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Nav lights/switching power supplies
On Nov 6, 9:55*am, "RST Engineering" wrote:
A. *A magazine article is not a technical journal. *Switching power supplies CAN have noise. *Linear power supplies CAN oscillate. *There are no "Design Notes" *in ANY of my articles; you are expected to have at least a passing knowledge of the art. B. *Sarangen said that there are problems with noise generation in switchers and it is general knowledge in the electronics industry that this is so. *I didn't see in Mr. Sarangen's "Design Notes" how he tested a switcher in his application and what his conclusions were with any conceivable permutation of avionics. *However, there are noise problems with ANYTHING that generates a signal, all the way from any nav or com radio that was ever made, GPS, Loran, and the whole spectrum of electronic devices. C. *As to putting "Experimental" in the title of the article, would you once again tell me what magazine you saw the article in? *Did that give you a passing clue? Jim -- "It is the mark of an educated mind to be able to entertain a thought without accepting it." * * * * --Aristotle Jim, Sorry, I didn't see "It all depends on how you build it" in the "Design Notes" section of the last article. *In the August issue of Kitplanes you mention a linear regulator article as a resource-- "Sarangan Article"--but identified the complications of that system. Sarangan, in his article, stated there are problems with noise generation with switching power supplies and that is why he chose his path. * It seems, maybe, noise problems should have been at least mentioned in your article. *Another title possibility--"My EXPERIMENTAL switching power supply". Jim, In response to your response: A. Jim page 72 of the October issue of Kitplanes clearly states "Design Notes". How long since you were diagnosed with Alzheimer's. As far as a passing knowledge of electronics-that is why I asked the original question. The last paragraph of the August issue of Kitplanes, "Optics 101:We start the LED nav light series": "Stay tuned. We may be able to do the landing light for less than a tenth of the $500 those suckers were going for last year at Oshkosh." Are we doing landing lights or nav lights? Implication is that this is a buildable project. No errors in any of these articles... B. You stated "there are noise problems with ANYTHING that generates a signal", but earlier you answered "It all depends on how you build it" to the original question: " Is there a noise filter requirement to minimize disruption of radio operation?". Jim, which is it? Both? C. See A., above, you should really remember where you submit your articles for publication. I'm embarassed for you. More feedback. It seems easier for you to respond with a personal attack than possibly admitting an oversight on your part or an editor's and/or just answering the question. |
#6
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Nav lights/switching power supplies
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#7
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Nav lights/switching power supplies
A. Jim page 72 of the October issue of Kitplanes clearly states "Design Notes". How long since you were diagnosed with Alzheimer's. Yes, idiot bird. There WERE design notes. All of them having to do with the ELECTRONICS of the design; none of them having to do with EMI, thermal, operational, and all the rest of the stuff you consider when you build something for an aircraft. As far as a passing knowledge of electronics-that is why I asked the original question. The last paragraph of the August issue of Kitplanes, "Optics 101:We start the LED nav light series": "Stay tuned. We may be able to do the landing light for less than a tenth of the $500 those suckers were going for last year at Oshkosh." Are we doing landing lights or nav lights? Implication is that this is a buildable project. No errors in any of these articles... Talk about Alzheimers...long rambling discourse with no particular point... B. You stated "there are noise problems with ANYTHING that generates a signal", but earlier you answered "It all depends on how you build it" to the original question: " Is there a noise filter requirement to minimize disruption of radio operation?". Jim, which is it? Both? Both or neither. You evidently have never done any design involving EMI or you wouldn't have asked such a sophomoric question. If you put sharp risetime pulses down a 30 foot wire (antenna) and expect them not to have an effect on close-by electronic devices, then you are a novice. If you put the sharp pulses out at the end of a 15 foot metal wing, enclosed in a copper shield box grounded to the center of the earth, filtered to a fair-thee-well with all sorts of bypass and such, then you probably won't even know that the pulses are there. The vast world of practical design lies in the middle between these two. C. See A., above, you should really remember where you submit your articles for publication. I'm embarassed for you. See my answer. If you don't get the irony of the answer, then I'm embarassed for your lack of understanding. More feedback. It seems easier for you to respond with a personal attack than possibly admitting an oversight on your part or an editor's and/or just answering the question. No, and I refuse to continue a battle of wits with an unarmed man. Discussion over. Jim |
#8
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Nav lights/switching power supplies
On Nov 7, 8:17*am, "RST Engineering" wrote:
A. *Jim page 72 of the October issue of Kitplanes clearly states "Design Notes". *How long since you were diagnosed with Alzheimer's. Yes, idiot bird. *There WERE design notes. *All of them having to do with the ELECTRONICS of the design; none of them having to do with EMI, thermal, operational, and all the rest of the stuff you consider when you build something for an aircraft. As far as a passing knowledge of electronics-that is why I asked the original question. *The last paragraph of the August issue of Kitplanes, "Optics 101:We start the LED nav light series": *"Stay tuned. *We may be able to do the landing light for less than a tenth of the $500 those suckers were going for last year at Oshkosh." * Are we doing landing lights or nav lights? *Implication is that this is a buildable project. *No errors in any of these articles... Talk about Alzheimers...long rambling discourse with no particular point.... B. * You stated "there are noise problems with ANYTHING that generates a signal", but earlier you answered "It all depends on how you build it" *to the original question: " Is there a noise filter requirement to minimize disruption of radio operation?". * *Jim, which is it? Both? Both or neither. *You evidently have never done any design involving EMI or you wouldn't have asked such a sophomoric question. *If you put sharp risetime pulses down a 30 foot wire (antenna) and expect them not to have an effect on close-by electronic devices, then you are a novice. *If you put the sharp pulses out at the end of a 15 foot metal wing, enclosed in a copper shield box grounded to the center of the earth, filtered to a fair-thee-well with all sorts of bypass and such, then you probably won't even know that the pulses are there. *The vast world of practical design lies in the middle between these two. C. *See A., above, you should really remember where you submit your articles for publication. *I'm embarassed for you. See my answer. *If you don't get the irony of the answer, then I'm embarassed for your lack of understanding. More feedback. *It seems easier for you to respond with a personal attack than possibly admitting an oversight on your part or an editor's and/or just answering the question. No, and I refuse to continue a battle of wits with an unarmed man. Discussion over. Jim Jim, Any one that reads your last dissertation will see and probably agree that you proved my points. Adios. |
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