You and your OP-Amp Kit are Stranded on a Deserted Island ...
CounterRotatingProps
Posts: 1,132
You have enough solar power·from your ship-wrecked boat... Of course, you'd want any and all op amps related to signaling. So let's exclude those specialized·for radio/transmitting because you'd take them·anyway.
You can pick any other Op-Amps. You're limited to 20 types, with say 100 each...
Unfortunately for you, you will be stranded for 5 years - and there is nothing else to do on the Island except be haunted by the theme from Gilligan's Island.
What Op Amps would you take?··And a short "why" would be great.
thanks,
-Howard
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You can pick any other Op-Amps. You're limited to 20 types, with say 100 each...
Unfortunately for you, you will be stranded for 5 years - and there is nothing else to do on the Island except be haunted by the theme from Gilligan's Island.
What Op Amps would you take?··And a short "why" would be great.
thanks,
-Howard
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Comments
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Sure, the 741 *might* belong in the list - but since it's not got much headroom between the rails, and other issues, it's probably not good enough for "professional survival mode" [noparse]:)[/noparse])
Then, again, maybe a few are needed to be expendable before using the good stuff.
Any more takers please? Even if you list only a couple, that's great. The real purpose of this is to get a consensus on essential OpAmps to stock a basic electronics lab for a serious hobbyist or pro working alone... I'll consolidate the list at the thread top if/when we get a good number of chips listed.
So your suggestions hopefully will be of assistance to other folks here too.
thanks
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The 741 was the one that popped in my head immediately (386 too but audio only if I remember). 741 might not be the best, but it is very common, and I would certainly recognize it in a circuit board ... the slew rate might be worse than a 386 though. Of course I would probably be looking for diodes, transistors, caps, etc... and a big fire (which would serve a few purposes). I'm afraid using the boat battery for powering a makeshift soldering iron would not be very efficient. Hmm, a magnifying glass and the equatorial sun might help Fahrenheit 451?. I would also want a meter if it was available ... in lieu of that, a long thin wire, nails, and some frogs (or fish) might help.
Great picture by the way [noparse]:)[/noparse]
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--Steve
Propeller Tools
I have to admit I haven't done much that requires more than the readily available generic TL082 or LM1458 could handle.
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As for Op-amps to have handy, the ones mentioned are fine but some are out of date, how about a few of these to try??
LM358 dual op-amp for $0.50 from Parallax
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
I am asking for OpAmps only - not really for survival or rescue tips (which we hope we'll never need, eh?)
In other words, you won't be rescued for 5 years, but all you have is food, shelter, power, and OpAmps to keep you from loosing your mind. (OK, sure, as a travelling tech, you had your test gear, meter, scope, soldering iron and an inverter, on board [noparse]:)[/noparse]
Ouch - The sharks ate your marine radios.
Looking for the useful, practical ones, but also for interesting, new, or unusual items like:
- micro-power or rail to rail, e.g. TI's TLV276x
- high slew-rate, wide bandwidth, e.g. TI's THS452x differential
- filters, etc for ADC/DAC, e.g. Linear Tech's LTC6603
- precision, zero drift instrumentation, e.g. Linear's LTC2053
- high-current, feedback line drivers, e.g. Linear's LT1210
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Post Edited (CounterRotatingProps) : 8/31/2009 9:25:14 PM GMT
The LTC1078 is one of my favorite micro power Dual-Op Amps
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
LOL
that's very funny - so ok, in your case -and yours only- you can have a direct radio connection to Mike Green... but when he tells you what to get, please let us know. [noparse]:)[/noparse])
- H
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· -- Carl, nn5i@arrl.net
The FCC wouldn't care either, in such a situation (I think being stranded counts as life threatening) it is perfectly legal to use any frequency available to you.
Rich H
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--Steve
Propeller Tools
"Code practice oscillator? You want someone to hear the audio? Me, I'd want to generate some RF instead."
jazzed,
I thought Beau was talking about making a spark-gap generator
Considering who would be putting it together, you never know what technical borderline I would be breaking.
...The next survival reality TV show in the making.
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
have you been studying the Professor's role from Gilligan's Island again?
Make's me think of the good line from another oldy, "Lost in Space":
"It must be a dented diode or a twisted transistor."
LOL
- H
PS more op amps, please?
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Op amps though:
LM10 one of the original low power rail to rail op amps with a built in 0.2 volt reference. Versatile. It should be packed in along with Jim Widlar's original descriptions and application notes, because you can spend 5 years figuring out how it works and trying the circuits.
LT1490A a micropower op amp, rail to rail with good accuracy. I really like this one. Others are bringing the LM358s and the LT1078s, so we can share.
LTC1051 autozeroing for high accuracy, 5 microvolts input offset. But will we need such accuracy on the island?
LMC6062 for femtoAmp input bias current for our pH meters that we will need for our fish farm.
LTC6241 for higher bandwidth, 18 mHz with 1pA input bias for our light wave communication system (just in case).
LT1028 for best noise figure and 75 hHz bandwidth, for audio, Hey! we may as well have top notch audio gear.
Matched transistor arrays. Plenty of time to build our own op amp or special function Better bring the book.
Sample box of op-amps with a wide range of characteristics. There is a reason there are so many available, no single one is ideal.
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Tracy Allen
www.emesystems.com
good, now we won't be too bored on the island, will have yummy fish and good accuracy for measuring sand-grain diameters...
Here's some reading material for the hammock hung between the palms:
http://www.national.com/rap/Horrible/widlar.html
link from there to some of Widler's app notes [noparse]:)[/noparse]
- H
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And he for one really looks like he actually has been stranded on a desert island with just a couple of opamps ;-)
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> I love reading Bob Pease's columns...· Don't know why National got rid of him.
Maybe because he asked, "What's all this National Semiconductor Management Stuff, Anyhow?"
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
I liked Tracy's comment on the OpAmp question,·"There is a reason there are so many available, no single one is ideal."
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
Post Edited (Whit) : 9/2/2009 3:41:28 PM GMT
I was thinking from the angle of being a former co-worker, but yes I agree, I suppose it does "take one to know one" - grin
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
I started using the LM34 temperature sensor soon after it came out from National, and called their tech support line for advice about calibration. The operator said, "one minute", I found myself talking to Bob Pease. Not just some guy from marketing. Bob explained how they did the calibrations at the wafer level in production and compared that to the double cardboard boxes they had in the development lab and the tricks to setting it up to get accurate results. His writings are amazingly eclectic, from how to troubleshoot a leak in your roof, to motorbike trekking in Thailand.
More Bob Pease about Bob Widlar: www.national.com/rap/Story/widlar.html
And Widlar's article New Op Amp Ideas, incidentally, written while he was working sort of on an island, out of a post office box in Puerto Vallarta.
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Tracy Allen
www.emesystems.com
Wow, Tracy
looks like you've dug up some buried treasure - arrr matey!
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Post Edited (CounterRotatingProps) : 9/1/2009 9:46:48 PM GMT