About LED indicators and tail-lights
Good Morning
Firstly, may I be excused for this blatant cross-post, however the discussion that follows may be of interest to readers with regard to the burgeoning use of Light Emitting Diodes in automotive applications that spans the gamut of manufacturers... The item I am going to detail has many other uses in addition to tail-lights, courtesy lights, indicators et al, including but not limited to traffic lights - see, this is on topic - IR illumination, industrial LED signalling applications and many, many more. Updates and further information may be obtained in other groups including sci.engr.lighting. Scenario: You want brake lights to double as tail-lights using the same LED array, how do you do it? http://www.geocities.com/ledaccelerator details a new invention that provides a method to make otherwise dull LED's much brighter, allows LED's to be used at two luminosity levels so making the ubiquitous LED a lot more useful...And allows LED's to be overpowered without letting the smoke out (blowing up). The invention, or rights to it are for sale probably rendering this post as an advertisement. In any case I will respond to responsible criticism. Thank you for your indulgence. Peter Lowrie ++64-4-9766712 |
Re: About LED indicators and tail-lights SPAM SPAM SPAM
"Peter Lowrie" <peterlowrie@consultant.com> wrote in message news:rP0zb.10986$ws.1018473@news02.tsnz.net... > The invention, or rights to it are for sale probably rendering this post as > an advertisement. abuse@paradise.net.nz abuse@tsnz.net |
Re: SPAM or Ad
pookeybrain wrote:
> > "Peter Lowrie" <peterlowrie@consultant.com> wrote in message > news:rP0zb.10986$ws.1018473@news02.tsnz.net... >> The invention, or rights to it are for sale probably rendering this post > as >> an advertisement. Thanks Pookeybrain, I said that. Peter Lowrie |
Re: About LED indicators and tail-lights
"Peter Lowrie" <peterlowrie@consultant.com> wrote in message
news:rP0zb.10986$ws.1018473@news02.tsnz.net... > snip < > http://www.geocities.com/ledaccelerator details a new invention that > provides a method to make otherwise dull LED's much brighter, allows LED's > to be used at two luminosity levels so making the ubiquitous LED a lot more > useful...And allows LED's to be overpowered without letting the smoke out > (blowing up). > snip < > > And what a load of rubbish it all is. |
Re: About LED indicators and tail-lights
Alien Zord wrote:
> "Peter Lowrie" <peterlowrie@consultant.com> wrote in message > news:rP0zb.10986$ws.1018473@news02.tsnz.net... > >>snip < >>http://www.geocities.com/ledaccelerator details a new invention that >>provides a method to make otherwise dull LED's much brighter, allows LED's >>to be used at two luminosity levels so making the ubiquitous LED a lot > > more > >>useful...And allows LED's to be overpowered without letting the smoke out >>(blowing up). >>snip < >> >> > And what a load of rubbish it all is. What it sounds like he's doing is using a chopper circuit to run 5V LEDs on another power source at perhaps a slight overvoltage. It's Voltage Regulation 101, and really nothing special from what I can tell. Besides, you can do the two-level brightness thing with a divider network if you were so inclined. Resistors are cheap. -lee |
Re: About LED indicators and tail-lights
Lee Cremeans wrote:
> Besides, you can do the two-level brightness thing with a divider > network if you were so inclined. Resistors are cheap. Faced with coming up with a solution for "visible taillight/bright brake brakelight combo unit based on LEDs", I'd just go with two different grids of LEDs. 30% of all LEDs in the housing are ON for the normal taillight function, the remaining 70% will be switched on once the brakes are activated. |
Re: About LED indicators and tail-lights
"Lee Cremeans" <lee@lcremeans.homeip.net> wrote in message
news:X6-dndu8_JYrglOiRVn-jA@speakeasy.net... > Alien Zord wrote: > > "Peter Lowrie" <peterlowrie@consultant.com> wrote in message > > news:rP0zb.10986$ws.1018473@news02.tsnz.net... > > > >>snip < > >>http://www.geocities.com/ledaccelerator details a new invention that > >>provides a method to make otherwise dull LED's much brighter, allows LED's > >>to be used at two luminosity levels so making the ubiquitous LED a lot > > > > more > > > >>useful...And allows LED's to be overpowered without letting the smoke out > >>(blowing up). > >>snip < > >> > >> > > And what a load of rubbish it all is. > > What it sounds like he's doing is using a chopper circuit to run 5V LEDs > on another power source at perhaps a slight overvoltage. It's Voltage > Regulation 101, and really nothing special from what I can tell. > > Besides, you can do the two-level brightness thing with a divider > network if you were so inclined. Resistors are cheap. > > The OP has cross-posted this in many NGs including some electronics ones and it transpires that he does not even know a basic Ohm's law. He's no doubt picked up a current pulsing circuit (PWM of some form) from some beginners guide to electronics book and pretends that its his own 'invention' and is trying to sell it for a close to a million bucks. http://www.geocities.com/ledaccelerator/outright.html What a laugh. In another post he claims to have invented an engine running on water: http://www.google.com/groups?q=autho...snz.net&rnum=3 Come to think of it, our forefathers did that! Its called the water wheel! |
Re: About LED indicators and tail-lights
On Wed, 03 Dec 2003 18:06:29 GMT, "René"
<garbagejunkandcrap@hotmail.com> wrote: >Lee Cremeans wrote: >> Besides, you can do the two-level brightness thing with a divider >> network if you were so inclined. Resistors are cheap. > >Faced with coming up with a solution for "visible taillight/bright >brake brakelight combo unit based on LEDs", I'd just go with two >different grids of LEDs. 30% of all LEDs in the housing are ON for the >normal taillight function, the remaining 70% will be switched on once >the brakes are activated. LEDs can be overdriven significantly with a PWM type supply, as the AVERAGE current is what is most critical. Higher current short term pulses make the led much brighter than the lower constant current. The led does not blow because the AVERAGE current is still less than the rated current. |
Re: About LED indicators and tail-lights
clare @ snyder.on .ca wrote:
> LEDs can be overdriven significantly with a PWM type supply, as the > AVERAGE current is what is most critical. Higher current short term > pulses make the led much brighter than the lower constant current. The > led does not blow because the AVERAGE current is still less than the > rated current. Clare, A phenominally astute observation - not one other person has figured this out. You are to be applauded! But with respect to the way the module works in practice - that is just less than 1/2 of the equation. Peter Lowrie |
Re: About LED indicators and tail-lights
"Peter Lowrie" <peterlowrie@consultant.com> wrote in message news:rP0zb.10986$ws.1018473@news02.tsnz.net... <snipped> > Scenario: You want brake lights to double as tail-lights using the same LED > array, how do you do it? You purchase the LED fixture designed to do that particular job. They've been available here for years. -- Brian www.accesswave.ca/~orion |
Re: Oh really
Alien Zord wrote:
> "Peter Lowrie" <peterlowrie@consultant.com> wrote in message > news:rP0zb.10986$ws.1018473@news02.tsnz.net... >> snip < >> http://www.geocities.com/ledaccelerator details a new invention that >> provides a method to make otherwise dull LED's much brighter, allows LED's >> to be used at two luminosity levels so making the ubiquitous LED a lot > more >> useful...And allows LED's to be overpowered without letting the smoke out >> (blowing up). >> snip < >> >> > And what a load of rubbish it all is. <FMywb.9505$ws.848493@news02.tsnz.net> <bpue8e$1skdgj$2@ID-183327.news.uni-berlin.de> <3fc32e19@clear.net.nz> Adam Aglionby wrote: > As some of you may have noticed I have been a vocal critic of Mr Lowrie and his claimed LED Accelerator. > In sci.engr.lighting I offered to send Mr Lowrie, with return postage paid,a disposable camera to take photographs of this development. > Mr Lowrie retains copyright of his photographs but I have licence to use them with appropriate credit in any commentary I may have on the device. > Mr Lowrie has accepted this offer and has told me that the photographs will include Voltage, Current Lux and nM meter readings with his device connected. > I remain verey very sceptical about this device but will make whatever photographs I obtain available to sci.engr.lighting, sci.electronics.design and www.candlepowerforums.com Adam Peter Lowrie follows up: http://www.geocities.com/ledaccelerator/9/index.html ....Is what it's all about. So that's all good and proper, thank you Adam. As it turns out you are not only a scholar but a gentleman also. Scott Stephens has been scratching his head, Daniel Stern ever the businessman trusts no-one and Clives LED teleporter sounds amazing...LOL. Still a prototype sits atop the oscilloscope over there on the corner of my table as it has been for about four weeks now shining away in two modes - 'accelerated' and non. Not one LED has gone Poof, snap, crackle or Pop! Whereas component values won't be displayed, I'll also shoot a temperature measurement on the bright LED's for you. Adam didn't mention input voltages which I will be able to show in photographs - that the unit is running from a 9 volt supply. Hope is I can photograph it all in such a manner as to not give a secret away and clear enough so that Daniel will be able to trace the test leads back to instruments thus verifying that no skulduggery is afoot. I do not want to lead you gentlemen astray and given the pressure exerted by way of your (and other posters) various dubious assertions of malfeasance and snake charming, methinks any lesser mortal or fraudster would have shrunk back into some dark recess, disappearing from view by now. You all have available comprehensive information from links on the site regarding my various exploits, endeavours and accomplishments by way of a downloadable CV. Terms like; open book, spring to mind. Oh, by the way, an offer arrived yesterday which I will consider in due course. :-) Yours etc Peter Lowrie |
Re: About LED indicators and tail-lights
How revolutionary. It would look nice next to my worm hole generator on my
work bench. I too have an oscilloscope not only that I know how to use it. Funny I also got an LED to glow really brightly powered from a 0-30V PSU, although what that has to do with thermocouples has me and Dr Who at a loss. A bit of experimentation showed I could get it very bright it only cost me a few blown LEDs. The reduced life span is not a worry as they are cheap and last years anyway. A PWM (Pulse Width Modulation) could also do the job a quite high overvoltage could be achieved and the pulse width changed to prevent the LED overheating. As Ohms law tells us this will chuck more current through the device until it melts, shorten pulse width to allow enough cool et voila. The human eye is all that is required to do the rest. How do you think a TV works? It is not a steady picture but one dot moved very quickly, the human eye can only detect flashes of less than 25Hz that and the phosphor coating so the picture looks steady. After reading this I tried the same in my garage and blow me down with a feather it works. The LED is brighter to the human eye. I'll give you $1 for it. Unlike my worm hole generator which at the moment is only lacking around $25Bn and a compact singularity power source. Odd you haven't got funding for this yet is it not. A quick trip to Philips and a demo should secure funds. Where do you thing they got the idea for Stargate (tm) the series, after a trip to my garage of course. However theirs is not real and they had to fudge it with an Alien device to make it work. Oh on another note, a friend of mine has a torch that does exactly this to overdrive an array of LEDs they do flash but most of the time look rock steady and very bright. It cost only a few $s from Hong Kong. I hope you find an investor, then I hope they get killed in a freak accident so they do not pass the stupid or gullible gene on to another generation. Oh how fickle humans are. Try harder next time Dave "Alien Zord" <rem.alienzord@dsl.pipex.com> wrote in message news:bql0b3$238t89$1@ID-172721.news.uni-berlin.de... > "Peter Lowrie" <peterlowrie@consultant.com> wrote in message > news:rP0zb.10986$ws.1018473@news02.tsnz.net... > > snip < > > http://www.geocities.com/ledaccelerator details a new invention that > > provides a method to make otherwise dull LED's much brighter, allows LED's > > to be used at two luminosity levels so making the ubiquitous LED a lot > more > > useful...And allows LED's to be overpowered without letting the smoke out > > (blowing up). > > snip < > > > > > And what a load of rubbish it all is. > > |
Re: About LED indicators and tail-lights
Thank you David
> how fickle humans are. And, of course, you are not. 2c PEL |
Re: About LED indicators and tail-lights
"Dave Wood" <pantsdave.wood@dsl.pipex.com> wrote in message news:3fd4e451$0$23811$cc9e4d1f@news.dial.pipex.com ... > How revolutionary. Have a more comprehnsive reply but in meantime, your vote counts ;-) http://www.led-myths.tk Adam |
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