- posted
8 years ago
This ADC dissipates only 7.5 milliohms!
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- posted
8 years ago
That's really low!
I didn't know that anyone still made dual-slope ADCs, much less serial adapters for them.
Bizarre.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement
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- posted
8 years ago
I've seen this typo in a couple of different places lately. It's almost as if a certain page layout package has suddenly started interpreting uppercase 'W's as lowercase omegas and rendering them in their original upper case.
Makes no sense, I agree, but how could something like this happen through human error? Experience leads me to blame Adobe by default.
-- john, KE5FX
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- posted
8 years ago
Truly a breakthrough in fundamental physics!
-- Tim Wescott Wescott Design Services
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- posted
8 years ago
0.0075 OHMS? Have your apples been mating with your oranges lately*?
- Wait -- you're from the Bay area. Maybe so.
-- Tim Wescott Wescott Design Services
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- posted
8 years ago
It's not as if many people waste time proof-reading data sheets any more.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement
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- posted
8 years ago
It makes good sense, actually. MacOS has always mapped omega to the Z key (use option-z to type an uppercase omega). So there's probably a font-change somewhere, and instead of a 256-character ASCII extension, someone has used an escape sequence. And someone else clobbered the interpretation (or used a font without the right characters). Font substitution would explain it.
I've had trouble recently typing anything in monospace fonts (like, for schematics); some automated process shortens my whitespace, occasionally. Those darned invisible actors in the background: the modern name is 'daemon'. Perhaps we should revert to the traditional 'gremlin'!
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- posted
8 years ago
I didn't know anyone still made 14 pin DIP's.
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- posted
8 years ago
I invented the dual-slope ADC when I was a kid. Could have made a fortune. But all I could think of was relays to switch the integrator inputs, and that wouldn't work well, so I didn't pursue it.
And also one time, as a kid, I stepped on a dead-bug DIP14 barefoot. That hurt 14 times as much as you might expect.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement
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- posted
8 years ago
I trod barefoot on a windowed 28 pin eprom, that hurt double!
piglet
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- posted
8 years ago
It is much worse when you stand on the end of a splinter from a multi-strand wire. It's easy to see the DIP packages and pull them out (I've done that too) - but when a tiny bit of wire gets stuck in, it's a bugger to find and remove.
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- posted
8 years ago
I invented the 16-segment British flag display at 11, and interleaved memory as a teenager, but they both already existed.
I was too careful to have them lying on the floor. But when I worked in a locksmith shop grinding keys I got brass splinters in my eye a couple of times, in spite of wearing goggles. They made a 2-point bounce on my face and the goggles. Hardly felt it, but it's a little scary to pull it out with a tweezer.
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- posted
8 years ago
On Thu, 17 Dec 2015 09:37:25 -0500, "Tom Del Rosso" Gave us:
I got impacted with a steel shaving from a grinding wheel once when I was a kid, and the eye doc used a magnet to pull it out.
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- posted
8 years ago
They have MRIs for that now.
-- Rick
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- posted
8 years ago
But the magnet is just as likely to pull it through the other side.
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- posted
8 years ago
Isn't that why we have "managed" health care?
-- Rick
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- posted
8 years ago
With the eyeballs attached.
Best regards, Piotr
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- posted
8 years ago
The field in an MRI is, at great expense, extremely uniform. So there is nearly no gradient. So it won't move a splinter.
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- posted
8 years ago
The great gradient is present at the entry/leave phase. The superconducting coils are always energized.
Best regards, Piotr
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- posted
8 years ago
If the magnetic object is not spherical, there will be a torque. There were a number of "nonmagnetic" materials used before MRI became common - titanium clips, screws, plates etc. Commercially pure titanium has a very low (slightly paramagnetic) susceptibility but it suffers from poor shear strength. It's routine to use chromium, iron, cobalt and nickel to improve mechanical properties at levels as high as 2%. There were a number of "misadventures" before that got under control.
-- Grizzly H.