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UserNameTitleDescriptionPost Date
indigoerHelp put together some junction boxesHi, I’m putting together some junction boxes for domestic lighting using RS own brand DIN terminals in a suitable enclosure (home automation later would favour grouping the wiring into a limited number of JBs with space to accept relays later). One thing that came to mind was to do with these: They are the special DIN terminals that have a screw operated clamp to the DIN rail which claims to provide electrical continuity. How might I decide if these would provide suitable and reliable continuity for the circuit CPC on say a circuit protected by a C10 RCBO? Or do you reckon they are just fine? Points I’ve considered: Reliability – these clamp to a plated steel rail – so providing the plating holds and the rail does not corrode, then OK Clamping action seems positive. Contact resistance: haven’t attempted to measure yet, but I suspect it would be off the bottom of the range of my Megger. Fault current – worst case scenario: hundreds of amps but no more than 1kA for a very short time. There is a little leeway in that the circuit is RCD protected, but I feel it would be bad practice to factor that in as a key design consideration. What do you folk think of such devices? Many thanks, Thursday, January 23, 2020
3:05 AM
John SeitzWhat is the official name of the metal plate inside the control cavity of some Gibson Les Paul guitars?There is a metal plate inside the control cavity of some newer Gibson Les Paul electric guitars. This plate has all 4 potentiometers fastened to it. What is the official part name of this plate? Thursday, November 24, 2016
9:50 PM
jameswiliamDuct Inspection RobotsThe SPRW duct cleaning companies in India providing inspecting and cleaning services for your commercial, industrial and residential needs. For anyone who want to inspect and clean your things, use duct cleaning robots today. Saturday, April 9, 2016
5:56 AM
JabberwockyFun facts about xerography! Xerography was invented by American physicist Chester F. Carlson (1906–1968) in 1938. After earning his physics degree from the California Institute of Technology in 1930, Carlson accepted a job working for the P.R. Mallory Company, an electronics business in New York. Working in the patent department, Carlson was frustrated by the difficulty of obtaining copies of patent drawings and specifications. He decided to use his time away from work to find a solution to the problem. Focusing on the concept of electrostatics, Carlson spent four years before succeeding in production his first "dry-copy." The first successful copy was a notation of the date and location that read "10.-22.-38 Astoria." (Carlson lived in Astoria, Queens, New York at the time.) In 1940, Carlson obtained the first of many patents for his xerographic process. Wanting to find a company that would help him develop and market his idea, Carlson began showing his solution to many organizations. After more than twenty firms turned down his invention, Carlson finally reached an agreement in 1944 with the Battelle Memorial Institute, a nonprofit research organization. Three years later, the Haloid Company (later the Xerox Corporation) became a partner in the development of the xerography technology. Finally, after years of development, the first office copier—the Xerox 914—was introduced in 1959. Read more: Friday, December 19, 2014
6:57 AM
jorgeRodriguezconnecting two transistors operating from AC powerHi... I am new in this forum... Thanks for accepting me. I have an colpitts oscillator operating with one single transistor fed from AC voltage coming from a very small power generation (about 10 Vpp). This transmitter is embedded on a device working at 120degC and I am receiving its transmission outside of the device at normal temperature..... I wonder if instead to transmit when the cycle of the generator is positive... why not to another transistor and also use the negative cycle as well.... My wondering is if one transistor is coming in short, must not affect the other and the oscillator should be still working with the remanding transistor. Thanks very much for any idea. Jorge Pretoria Monday, April 21, 2014
2:14 AM
Shabaresh kumar.pSubstation automation with the use of micro controllerBy making the use of the microcontroler or embedded system technology we can make the substation working as automation in this v can make any of the type of substation as automatad this reduces the power loss while switching and others Monday, February 20, 2012
2:23 AM
TDietrich2010Does technology destroy or create jobs?I’ve been hearing a lot lately that part of the unemployment problem, in the US and worldwide, is that technology is replacing workers with automation. It’s really a moot point because the development of technology isn’t going to end. Labor saving inventions go back centuries, so it’s certainly not a new problem either. Robotics and automation have eliminated the need for many manual labor jobs, but those industries have also created many new ones – millions in fact. Tuesday, January 3, 2012
2:21 PM
eng58Prediction of powering homes with the physical activity of the residents isn’t feasibleAt the Niagara Falls Power Project visitor center they have an exhibit with an exercise bike, alternator, and 100 watt light bulb. If you peddle as hard as you can you can just get the bulb to full brightness. It’s hard work though, and you can’t keep up the pace for more than about a minute. Even a small energy efficient house uses many more times the energy of a 100 watt bulb. Any amount of energy harvested from physical activity is going to impede that activity and make it more difficult. You can’t generate energy without a cost. Just to generate a tiny fraction of what your house would require would make daily life in the house difficult and tiring. You could save yourself that by purchasing that same amount of energy from your utility for about a buck or two per month. Tuesday, December 20, 2011
11:43 AM
Bill_J62How “smart” should a smart grid be?The concept of a smart grid makes perfect sense: better coordination, better load balance and utilization of transmission lines, etc. The human element is important, however, and too much reliance on computer technology could be a mistake. In just the past year some of the best tech companies have suffered hacks, crashes, network outages, and issues that couldn’t be diagnosed and explained. I don’t want to see a whole city go dark because the smart grid turned out to be not so smart. Friday, October 28, 2011
4:40 PM
P_StephensPaul Allen vs. Ray Kurzweil on the human/machine 'singularity'The singularity is defined as a tipping point where machine intelligence catches up with human intelligence. Ray Kurzweil believes that the rate of technological advancement is increasing exponentially and that we may reach the singularity somewhere around 2045. Paul Allen, Bill Gates’ co-founder in Microsoft, disagrees and thinks it’s a very long way off. He believes that the more we learn about the human mind the more vast and complex that knowledge will become, and the more difficult it will be to comprehend in its entirety and emulate. He refers to this as the “complexity brake”. I agree with Paul Allen completely. The reality of computer advancement is much slower than the perception of that advancement. Computers still process in simple binary bits, there’s just a lot more transistors now. Quantum computers promise a quantum leap in power but most of that promise is still just in the theoretical stage. Just look at how frustratingly slow progress in fusion energy has been. I think Ray Kurzweil underestimates the complexity of the human mind and overestimates the rate of technological progress. Sunday, October 16, 2011
11:28 AM
DigitalHeadThe PC is dead? I don’t think so!I’ve been hearing ‘the PC is dead’ for about 10 years but I think that statement looks at it the wrong way. PC is an acronym for ‘personal computer’. Laptops, tablets, and smart phones are all personal computers, or PCs. The issue is really just an evolution of the form factor. Better screen, processor, and battery technology has allowed personal computer power in a much smaller and portable form factor than the original desktop tower. From that perspective I can’t imagine a day when the PC will be dead. Tuesday, September 13, 2011
9:23 PM
Bob SBMW’s laser headlightsThis is really cool technology! It would be even better if they had a high-power pulse button on the dashboard for those times when there’s a very annoying driver ahead of you. :-) Wednesday, September 7, 2011
9:14 PM
BSimmonsThe Higgs boson – a.k.a. “god particle” – looks pretty elusive and maybe not what they thought it would be.I’m completely in favor of big science and the Large Hadron Collider. It would be really sad if humanity said, “We’ve learned enough, let’s just stop here.” I can’t help wondering that a single particle might not be an oversimplification of the answer to mass that they’re looking for. Maybe the Higgs isn’t a particle but a vastly complex system of some kind. We’re in a realm that’s so small that our best instrument may never be able to reveal a true defining signal from the background noise. Tuesday, August 23, 2011
3:30 PM
Sam_T_76Reliability of spintronic computer processors.I understand the theoretical benefits of spintronic devices. I’m curious about the reliability though. It seems the operating process is pretty delicate and has some statistical unpredictability to it. I also wonder how easily a device could be effected by environmental magnetic fields or EMF. I’m thinking you might not want something like a manned spacecraft to be a first-adopter. Maybe start out with a video game console chip, where the consequence of errata would be minimal. Tuesday, July 5, 2011
10:24 PM
GeoDocElectron charge in ionosphere before Japanese earthquakeWhen I read the MIT article about this ( it sounded like something you’d hear on “Coast to Coast AM”, where the guest links it to some ultra-secret military project. The science of it is pretty interesting though, and seems plausible. If the correlation proves to be true this effect could serve as a valuable warning method to give populations enough time to prepare. Wednesday, May 18, 2011
7:55 PM
GreenMachineNuclear power plant safety and proceduresThere’s a lot of “news fog” about what’s happening with the Japanese nuclear power plants. It’s uncertain whether their safety systems are operating exactly as they should or if there are some problems. I hope it proves that the contingency plans and safety systems worked properly. Nuclear has a downside but the other renewable methods aren’t enough to significantly reduce fossil fuel use in the near future. Friday, March 11, 2011
4:28 PM
Slick1122AC vs DC voltageWe have a heater that operates on either AC or DC current at 90W to 120W. DC current flows in one direction. AC current flows in two directions. During operation the heaters work perfectly using AC or DC voltage. We know that a heater must be in contact with another surface to transfer energy or it will eventually burn itself out. Our operators occasionally will have to disengage the heater and do not always turn them off immediately. When running on AC voltage the heater may fail during this production stoppage, however when we wire the heaters in DC voltage we rarely or never see a heater failure during this same production stoppage. Can someone help explain why the difference? Wednesday, March 9, 2011
7:12 AM
DMcFarlandInductor energy storage vs. capacitor energy storageI just read the article on DC power supplies. It explains the fundamental differences between linear and switch-mode power supplies. It explains that switch-mode PSs rely on inductors for temporary energy storage in the circuit. I know that capacitors and inductors can store energy in different ways and I’m wondering why switch-mode uses inductors. Saturday, January 29, 2011
11:46 AM
AuroraThorium reactors – “One ton of thorium can produce as much energy as 200 tons of uranium and 3.5 million tons of coal.”This is really exciting potential, in my opinion. I’d like to see them expedite a pilot reactor then work to get public opinion behind it. I just hope environmentalists who are warning us about global warming don’t become an obstacle because they also don’t like nuclear. Thursday, September 2, 2010
9:39 PM
AdminPaulhInternational Linear Collider – “The next machine to look deeper into the atom”There’s a lot of controversy over whether or not to invest large amounts of money into these major science projects. There’s no guarantee of return on investment but it’s the opinion of this site that these projects are very valuable and worthwhile. Friday, August 20, 2010
4:18 PM

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