Basics
in [Electronics]
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ringing inductor in boost circuit I breadboarded a little voltage booster. Here's the business end of the circuit: +5v | ,------------+ | | | | | ) | )220uH /e ) -1k--| | \c ,---... 28 Jun 2010 19:28
Garbage in, Garbage out (Was Re: Why the Ignorant / Stupid Are the First Responders to Good Math / Science / Tech OPs) On Jun 22, 12:34 pm, Bret Cahill <BretCah...(a)peoplepc.com> wrote: You've seen it happen a thousand times. The first responses to a good OP will be those with nothing to say and no interest in the subject, IOW, the stoopid. Later on the knowledgeable appear exposing the first responders as complete fo... 22 Jun 2010 22:39
BP loves Waxman-Obama cap&trade (circa Kyoto Protocol, or Waxman's '91 bill) that *was* rather easy. so, why can't we just have a little tax on carbon, instead of this "free trade" rip-off? This is easy to explain: --le theoreme prochaine du Fermatttt! http://wlym.com ... 22 Jun 2010 21:33
Why the Ignorant / Stupid Are the First Responders to Good Math / Science / Tech OPs You've seen it happen a thousand times. The first responses to a good OP will be those with nothing to say and no interest in the subject, IOW, the stoopid. Later on the knowledgeable appear exposing the first responders as complete fools. This is easy to explain: 1. The thoughtful, by definition, are goi... 6 Jul 2010 22:14
Fueling your car with natural gas from home Dear Everyone, as you know the price of the Oil is more and more increasing, while the oil supply is decreasing. Moreover Oil is causing wars, terror, oil spills, a lot of greenhouse gases. Do you know that there is plenty of natural gas ? The supply will last for many decades, probably for hundred years. A lot o... 22 Jun 2010 06:06
Barcode Label Printing Now I know im not the only one who has had problems trying to do their own <a href="http://www.aclabels.co.uk">barcode label printing</a>. I started trying to print my own about 6 months ago but kept encountering lots of problems. I downloaded good software and bought a label printer (Zebra), but still I came acros... 23 Jun 2010 09:31
Rare Example of Instrumented Bldg Damaged During During An Earthquake http://www.usc.edu/dept/civil_eng/Earthquake_eng/Selected_Publ/PDF/ICS_Paper_II.pdf Two interesting questions: Why aren't they instrumenting bldgs today with relatively cheap MEM accelerometers? Who decided to spend the equivalent of 200K on force balance accelerometers and other electronics 40 years ago for... 22 Jun 2010 23:44
Photovoltaic inverter question I have a photovoltaic inverter related question. Recently I have been looking into the possibility of building a grid-tie photovoltaic inverter. A number of semiconductor vendors e.g., Freescale, TI etc., sell controller kitss that have built-in pulse width modulation units etc., to process the DC input from the ... 23 Jun 2010 05:09
Video cards Hi, I am wondering how these Video cards are made. I have now studied little bit of Verilog and VHDL - very interesting indeed. I assume commercial video cards use ASICs. But are they defined with the HDL-languages ? I guess yes because otherwise it would be impossible to design them... Is there anywhere mo... 18 Jun 2010 20:11
Capacitor discharge probes Hello, I recently bought a Blue ESR meter and assembled it and it is working well. In the instructions it mentions making a jig with a 100 ohm 5 watt resistor attached to some probes for discharging capacitors before testing them with the ESR meter. How does one calculate the required resistor wattage for d... 22 Jun 2010 09:22 |