I see a lot of LED flashlights that don't use any kind of current limiter, relying on the small IR drop through the LEDS and the battery resistance to avoid runaway. Well, I suppose 100 hours is a long life for a flashlight or disposable toy light.
A ballast creates a current source from the mains voltage source, balancing out the negative impedance characteristic of a fluorescent bulb or LED. It can take the form of a reactive circuit element such as an inductor, capacitor, or dissipative resistor, or an electronic circuit which feeds the proper constant current. To make a constant voltage power supply into a constant current power supply, you change the feedback loop.
If somebody came up with a fuel cell that was cheap, ran on liquid like ethanol or butanol which could be stored easily and fit existing distribution, you'd have electric cars that ran like gasoline cars.
They oughta stop carrying so much freakin' ice. I ask for no ice in my drinks, sometimes get it. It just waters down the drink, gives you a brain freeze, and most of it is left to be disposed of.
I have the same opinion about closed source hardware that I do of closed source software. May their foo-foo connectors rot in hell with Betamax and Memory Sticks.
I live in the NE, too, and there's little chance of earthquakes, tornados, or hurricanes. Stay out of flood plains, and all we have to worry about is liberal politicians. Well, it snows some, but that we can deal with (and play in).
I'm an ex-Air force R&D engineer, and I worked most of my career developing vacuum tube equipment.
Now, you will notice that you have an S-band power oscillator vacuum tube in your kitchen right now. But what the government uses is mostly big, high power linear beam amplifier tubes like traveling wave tubes and klystrons. You need lots of power to run long-range radars for air traffic control and weather. Also, transmitting data from orbit. The typical radar TWT weighs more than you do, costs over $200K, and puts out hundreds of kilowatts of peak power.
I still have one guitar amp that uses tubes, but SS is the way to go, and that's been proven by articles in Electronic Design magazine (can't find the article right now, it was last year sometime). The people who like the tube sound actually like the output transformer sound.
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Because you can buy fresh Belgian beer here.
...is something I just looked at as a replacement to Audacity (just records, processes and edits). It has some cool features, so check it out.
Look how well it worked for Microsoft.
I escaped to the country with a degree from the University of Detroit in 1970. Doing OK now.
Went back to visit last summer, got a 2 inch drywall screw stuck in my tire. Won't be back again.
I'd worry about some of the dimbulbs running for election.
Cue the Wiener jokes.
I see a lot of LED flashlights that don't use any kind of current limiter, relying on the small IR drop through the LEDS and the battery resistance to avoid runaway. Well, I suppose 100 hours is a long life for a flashlight or disposable toy light.
A ballast creates a current source from the mains voltage source, balancing out the negative impedance characteristic of a fluorescent bulb or LED. It can take the form of a reactive circuit element such as an inductor, capacitor, or dissipative resistor, or an electronic circuit which feeds the proper constant current. To make a constant voltage power supply into a constant current power supply, you change the feedback loop.
Thank you for your opinion, though.
We (Rome NY) replaced them all many years ago, and I never see them replacing them, and one or two "sick" ones.
I'm running a Microsoft mouse on Mint.
The increase in adoption on supercomputers has come to a standstill also (flat line). There is no increase in market share possible.
If somebody came up with a fuel cell that was cheap, ran on liquid like ethanol or butanol which could be stored easily and fit existing distribution, you'd have electric cars that ran like gasoline cars.
Conservativism died with William F. Buckley.
..like where I live, in NY.
They can be pretty resourceful. I've seen guys change car struts with a bumper jack, and a sturdy belt as a spring compressor.
They oughta stop carrying so much freakin' ice. I ask for no ice in my drinks, sometimes get it. It just waters down the drink, gives you a brain freeze, and most of it is left to be disposed of.
I'd like to see if Print Master gold runs on Wine/Mint, but I don't have a 5-1/4 floppy drive any more.
I have the same opinion about closed source hardware that I do of closed source software. May their foo-foo connectors rot in hell with Betamax and Memory Sticks.
I told my dad (91) it's cheaper than a nursing home. Told my nephew it's cheaper than paying for a college education.
Yes, Microsoft was the customer. YOU are the product.
I hope they did more than a back of the envelope calculation, since they spent $2e9.
If half the people in Albuquerque put PV panels on their roofs to feed their air conditioners, your price of electricity might not go up as much.
I have a vacuum pump for sale for $75, which I though was a good deal. If you can get it for $0, don't pass it up.
http://utica.craigslist.org/tls/4120375327.html
I live in the NE, too, and there's little chance of earthquakes, tornados, or hurricanes. Stay out of flood plains, and all we have to worry about is liberal politicians. Well, it snows some, but that we can deal with (and play in).
I'm an ex-Air force R&D engineer, and I worked most of my career developing vacuum tube equipment.
Now, you will notice that you have an S-band power oscillator vacuum tube in your kitchen right now. But what the government uses is mostly big, high power linear beam amplifier tubes like traveling wave tubes and klystrons. You need lots of power to run long-range radars for air traffic control and weather. Also, transmitting data from orbit. The typical radar TWT weighs more than you do, costs over $200K, and puts out hundreds of kilowatts of peak power.
I still have one guitar amp that uses tubes, but SS is the way to go, and that's been proven by articles in Electronic Design magazine (can't find the article right now, it was last year sometime). The people who like the tube sound actually like the output transformer sound.
So TWTs are "interesting"? If they ran out of spares, a lot of satellites, comm links and radars would go dark. THAT would be "interesting".
...which they don't need or want, but is made from parts from every congressional district.