Assembling a 5 Piece Pulse Drum Kit
Evans EC2 G1 Power Center Emad drum heads Meinl HCS Cymbals
Duration : 0:7:0
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Assembling a 5 Piece Pulse Drum Kit
Pulse 5 Piece Drum Kit Tour
Pulse 5 Piece Drum Kit Tour
EC2 G1 Power Center Emad drum heads Meinl HCS Cymbals
Duration : 0:1:49
Can you help with a question about analog DC "pulse power" transformers?
Now back into it, I abandoned model model railroading back in the early eighties, until a couple of years ago. In the interim, DCC took off. I own many DCC locos but I have a lot of very nice, old vintage standard DC units too.
At about the time I bowed out, there was a controversy about running locos on pulse power and it was argued by detractors as being able to harm the motors within within the models.
My question is, how did that finally shake out? Can pulse power, although allowing for more prototypical analog DC operations, do harm to these small electric motors? Is there a harmful effect on dual function (DCC/DC) engines if run on analog pulse power?
Thanx!
Oddly enough, i too stepped away from the hobby in the 80s. only slowly returning now. pulse power and dcc were both new then. however dcc being touted as the wave of the future. i see, along with outlandish pricing, that dcc has indeed become the standard.
i dont recall much talk of pulse power harming anything. it was just another way to send the power to the rails. it was still dc, and the motors didnt know the difference. and now, 30 years later, my MRC power packs still work like a charm, as do my legacy locomotives of the 70’s and 80’s. so apparently no harm ever came to them from the years of using pulse power. (please note, i wasnt using cheap equipment, and serviced it regularly)
in my best opinion i would think pulse power would enhance dcc operations. as it did regular dc back in the 80s. my equipment is 30 and 40 years old and still to this day run like a top! as for dcc, i think you have asked a very, very excellent question. but really, dcc is just a glorified dc. its only difference is in the control, not the power. again, dc is still dc, and the motors running on it are the same. they just dont know the difference.
i think for all intents and purposes this would be a good question to submit to the guru’s of our esteemed trade magazines ( MR and MRC ). i myself dont plan on going to dcc atleast while its pricing is tantemount to funding a college education or buying a house. thats NOT what this hobby is about! but you have asked an excellent question, and i would be very interested in knowing this outcome.
it seems questionable to me that the control side of dcc (the onboard controller) may have a problem handling the pulsed power. being designed for straight forward dc as opposed to pulsed dc. and this i think is the real question. the motors certainly can handle it, the controller is the weak link.
2010-6-18 The Pulse : Daya Bay Nuclear Power Plant Leak
The Chinese government and China Light and Power have played down worries over recent reports of a radiation leak at the Daya Bay nuclear power plant. Some sources are arguing such fuel rod leaks are common. Another, quoted in today’s papers, says they have not been common for fifty years. But what say does Hong Kong have in operations at the plant anyway?
Duration : 0:5:57
Advanced FWE Pulse Jet Starting Tutorial
A different version of the advanced FWE valveless pulsejet tutorial. These little engines are available on ebay.
The engine is a valveless pulsejet with no moving parts, and easily self starts on propane, just turn on the ignition and turn on the fuel….
A valveless pulsejet is a unique type of engine with no moving parts. Unlike ramjets, which must have air blown into them at high speed, either by a blower or by traveling very fast, pulsejets can run while completely still.
They can be throttled typically between 10% and 100% thrust in the blink of an eye, and dont require any spool up time like turbines or turbojets.
Because they have no moving parts, valveless pulse jets are much easier to own and operate than RC turbines. For the cost of a ducted fan setup, you could have your own real, high speed RC jet plane.
The truth is that by the time you add up turbojet planes engine weight, fuel and oil pump weight, the computerized control system, and any onboard starting systems, you not only have a small fortune invested in the plane, but its also quite heavy. Pulsejets can be made extremely light weight, and even valveless engines are capable of pumping their own liquid fuels by the venturi effect. All you then need is your standard reciever and servos and a small battery to power it, rather than a large battery to power a fuel pump.
Duration : 0:5:42
Re: HHO Test – Power Supply v.s. Battery
In my previous YouTube video, I thought it was the pulsed current throwing my meters off and distorting the data. But Zero said “Well, I don’t know if it’s distorted or not. Think about it. Just because we’re hitting it with peak voltage that’s higher than the RMS value, the RMS value is still the same. Wattage calculations remain the same.”
OK, now I’m thinking — how can I get my car to act like the charger? After all the production was higher and the efficiency much better.
Hmmmm… I think on this, and talk to my friend Richard who knows about car electronics and he says, “Your car has an alternator with diodes, it also delivers a pulsed output”.
The alternator operates like the battery charger. The diodes send a pulsed current to the battery. The idea that I needed a laboratory power supply with perfectly filtered DC output was wrong. I’m believe a battery charger with a battery will simulate the power system of a car better than a steady lab quality power supply.
Duration : 0:4:27
EMP Electromagnetic Pulse Attacks Pt5 William Forstchen
Professor William Forstchen talked about how an EMP (electromagnetic pulse) attack could disable the power grid over large swaths of America. If fission bombs were detonated above the country, a gamma ray burst would trigger an electromagnetic disturbance, knocking out the infrastructure below it, he explained. Such effects have been demonstrated with high altitude nuclear tests such as Starfish Prime, and can be seen on a smaller scale in this video clip showing what happens to a Ford Taurus that gets zapped by EMP. Forstchen said in an EMP attack the power grid might be down for months or even years. He also warned that EMP effects could be caused by solar flares, like the superstorm that occurred in 1859. He suggested that people call for Congress to recognize that EMP is a real issue, and move toward strengthening America’s infrastructure. Rep. Roscoe Bartlett has taken this subject seriously, he added.
Duration : 0:9:55
How can I power a 40w light bulb with 9v?
I want to use a 9v battery and capacitors and whatever else i need to take a low current and make it pulse at a high one. How do I do this? I have capacitors/ resistors/ transistors/ just about everything I think i need. And I want the light to be pretty bright. Thanks
The lamp is operated by a specific voltage, maybe 120V. The power in watts is voltage times current in amps, so the current = 40W / 120V = 0.3333A. Thus we need 120V at a current of 0.3333A to light this lamp properly.
It is possible to convert the 9V battery to 120V as required, but we still need to supply at least 40W from the source (battery). If there are no losses in the conversion, the current at 9V would be 40W / 9V = 4.444A. This current is too high, because most 9V batteries are too small to deliver it. A normal small 9V battery may only deliver 50mA, so 9V x 0.05A = 0.45W. Perhaps a battery made of 6 x D size Nicad cells would supply this current for a short time..
The conversion is made by using a transformer usually, so the transistors form an oscillator, chopping the DC from the battery into AC, which can be transformed, then the voltage can be stepped up using the transformer. This process could be 70% efficient, so there will be 1.4 times the power needed for the lamp drawn from the battery.
It is possible to use capacitors to step up the voltage, by a process of repeatedly charging multiple capacitors connected across the battery, then changing the circuit using transistors as switches to switch all the capacitors in series. With no losses this would need 14 capacitors connected. This would be bulky, expensive and complex compared with the transformer method, so is not used for this type of conversion.
Look up inverters for more information.
EMP Electromagnetic Pulse Attacks Pt7 William Forstchen
Professor William Forstchen talked about how an EMP (electromagnetic pulse) attack could disable the power grid over large swaths of America. If fission bombs were detonated above the country, a gamma ray burst would trigger an electromagnetic disturbance, knocking out the infrastructure below it, he explained. Such effects have been demonstrated with high altitude nuclear tests such as Starfish Prime, and can be seen on a smaller scale in this video clip showing what happens to a Ford Taurus that gets zapped by EMP. Forstchen said in an EMP attack the power grid might be down for months or even years. He also warned that EMP effects could be caused by solar flares, like the superstorm that occurred in 1859. He suggested that people call for Congress to recognize that EMP is a real issue, and move toward strengthening America’s infrastructure. Rep. Roscoe Bartlett has taken this subject seriously, he added.
Duration : 0:9:56
Simple Pulse Width Modulation (PWM) for motor speed control with 555 timer
Pulse Width Modulation (PWM) circuit using 555 timer. http://www.easterngeek.com/2008/06/simple-and-dirty-pulse-width-modulation.html
Duration : 0:0:51