degreaser is that your employees use it, not you. The reason is because even that simple device is beyond your understanding.
So you are not going to understand the drive circuit in my LED lamp.
Hell, it took you nearly a decade to figure out how to add a pathetic, self aggrandizing sig to your pathetic, abusive posts.
He knows how to push your buttons. :(
-- You can't have a sense of humor, if you have no sense.
In other words, you don't know?
Jamie
-- Actually, I did peruse two of those sites and found that with the voltage drop across the diode, at the currents you mentioned, both cases resulted in real-world power dissipation in excess of the limits allowed. In addition, the Fairchild site which, in figure 5, clearly plots the ordinate in millivolts, is wrong. Apparently not having noticed that, I suspect you'll now make excuses and bitch on forever about how unimportant accuracy is.
Now you are weaseling.
It's not a matter of "accuracy", it's an obvious typo. The axis is obviously volts.
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
-- Nope, just stating a fact.
The y-axis on that fig 5 graph is obviously volts, and the "m" is obviously a typo. Given that, there's no accuracy problem. My job is to design stuff, not freeze in my tracks at the slightest excuse.
If you look at a smattering of 1N4148 data sheets, there's a huge spread of I-V curves. So I certainly wouldn't design a circuit that depends on the high-current I-V curve without making sure we'd purchase only one vendors's parts, and even then it would be risky. I wouldn't depend on their capacitance or reverse leakage behavior, either. 1N4148 is a very sloppy part.
All of which is aside from the issue of paralleling LEDs, which lots of people seem to do.
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Cool, let's talk about that:
OK, you have your super multimode Wal-Mart LED flashlight, maybe with optional laser pointer. The question is, how does it regulate the LED current? Inductive boost? Capacitive charge pump? Resistor? Linear or PWM current-regulator IC? Raw battery connected to LEDs?
You could take it apart and see what's inside. Or you could search the web for controller ICs. Or, more fun, you could learn some things about the issue without opening the flashlight at all.
Any ideas how?
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
I don't know either. He should tell us how his flashlight regulates current. Or, if he doesn't know (which he doesn't) he could do a little work to find out, and tell us. Which he won't.
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
What is this another attempt at a social insult?
Fuck off and DIE, John Larkin. You are a sad excuse for a civil, intelligent man. That may well mean that you qualify for none of the three titles. Likely even. You are worse, in fact, than Ross Perot could have ever been. And his remarks were not racist. It was just a poor choice of words. You actually were trying to be insulting. Big difference.
It means that a real, intelligent man like Ross has more honor and character than an insulting, pathetic, self aggrandizing piece of shit like you ever will.
Interesting that you would take a slight of a *flashlight* as such a personal insult....
...it's like he was insulting your manhood. You certainly respond as such. I wonder what Freud would have to say?
The first time you have spoken the truth in this group in quite some time.
I would, but only if it is MY desire, you pathetic, cringing little milksop.
Back to the lying horseshit behavior already, I see. There was a time when a man would simply drop you where you stand for pathetic, uncivil behavior like that. That is where the Colt motto came from.
You are an idiot.
For all you know, utilization of LEDs is what will make me rich.
Fact is, you don't know a goddamned thing, you pathetic, characterless, honorless piece of shit.
You mean it is the first time you have understood comments made from JL in a long time?
I am sure it would be your desire to do so, if you only knew, and then most likely would be a case where we wouldn't be able to shut you up!
And there were and still is, times where the pen is mightier than the sword.
Yes, how shameful of him to make such rude remarks about you doing work!
Well, there is a sucker born in every crowd. I am sure with your skills you'll be able to find some. Most people tend to hang with their own kind.
He may appear to you to be character less in your eyes, but I believe that would be due to lack of time on his part, wasting such traits to pamper the likes of you.
Have a good day, I am sure i'll be next on the list.
Jamie
It's truly amazing what woman are pushing out these days.
Jamie
You're an idiot. Go away, little boy.
Which is why we see you "hanging with" John, particularly in the midst of his dishonorable moments, which is nearly always.
You are pathetic. A coattail hanging twit, if there ever was one.
Hey, I like Wal-Mart. Too bad there are none nearby. We go to the ones in Sacramanto or Reno when we're in the neighborhood.
Which means that you don't know how your flashlight works, and you're not interested anyhow.
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Then start by understanding how they work. How does your high-end flashlight regulate LED current?
-- John Larkin, President Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
It must be hell to be manic depressive. ...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I do not suffer from stress, but I am a carrier.
Nah, some of my favourite transistors are bipolar.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
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