I noticed that Fairchild and OnSemi have marked several of their TO-92 JFET parts as "Last time buys being accepted", including J201, MFP102, 2N5457, and 2N5458.
What's the deal with this? Are they really being discontinued, or am I just misinterpreting the meaning of the product status? Will there be a replacement, or are they just being obsoleted?
Here's an example:
http://www.fairchildsemi.com/pf/2N/2N5457.html
:icon_eek:
The effects world has always ridden on the coattails of the rest of the electronics industry. There has never been enough volume in guitar effects to justify their own parts. As a result, when the larger electronics industry does not generate enough return on investment per part, the part is taken out of the active manufacturing line. This is one manifestation of what I call MBA Disease.
In this, the ongoing life of discrete JFETs in TO-92 cases will mimic the demise of germanium transistors. The manufacturers quit making them, then they are dumped for essentially zero cost onto the secondary markets, then if there is any small need they will be hunted down for huge prices. IF there is any small need, like for effects.
Musical electronics is very much an insignificant pimple on the wider electronics industry.
Thanks, RG.
I figured that was the reason, I just wanted to make sure I wasn't reading it wrong.
I think that the beloved 2N5952 is on the chopping block with Fairchild as well :'(
Well that's just a kick in the balls right there. The J201 and 2n5457 are pretty damn essential to stompboxes....and me!
Checking availability on element14 ... Surely all will go into smoke 1 day :icon_cry:
2N3819 .. Definitely ended long time ago . Only 288 left .
2N3820 ... Worse still only 20 left .
2N5461 ... 350 left
2N5486G ... 107 left
BF244 ... 349 in UK
BF244B ... 970 left
BF245A ... 1033 left in UK
BF245A,112 ( NXP) 193 left
BF245B ... 30 left WTF !
J108 stocks nearly exhausting ... 495 ( Vishay )
J111,J112 ... 5 and 314
J113 ... 24 Luckily there aren't much engineers in my land .
J175 ... 1200
J177 ... 13 ( Vishay )
J309 ... 26
PN4392 ... 10233 ( ALOT ! )
2N3820 ... 110 locally but 2526 in UK
2N5458 ... 1990 Hmm , that's quite alot .
2N5459 ... 44 but 426 in UK
2N5460 ... 53 but 485 in UK
2N5461 ( I had been sold this instead of 2N5457/58/59 by some bastards at a electronics tower before ) ... 185
2N5484 ... 175
2N5485 ... 372
2N5486 ... 490
2N5486.. ... 247
2N5951 ... 669
2N5951.. ... 2510 in the US
2N5952 ... 255
BF246A ... 1966 in UK
BF256C ... 80
J105 ... 78
J107 ... 23
J108 ... 228 in UK
J109 ... 524 in UK
J111 ... 5371
J112"D74Z ... 585 in UK
J174 ... 114
J176 ... 320
J177 ... 25
J177"D26Z ... 1676 in US
J201 ... 1044 Locally + 2955 UK + 3705 US
J202 ... 70
J211"D74Z ... 1840 in US
J270 ... 148 in UK
J310 ... 4252 US , 1740 UK , 93
J310G ... 135
MPF102_D27Z ... 226
PN4117A ... 101 , 3428 in UK
PN4392.. ... 22
PN4393 ... 275
NTE parts ? Don't bother , too expensive for a JFET . But you can choose one of them , seems like they all have been discontinued :icon_cry:
Quote from: bean on January 06, 2012, 12:05:17 PM
Well that's just a kick in the balls right there. The J201 and 2n5457 are pretty damn essential to stompboxes....and me!
Tell me about it. I'm glad I already bought a shitload of J201/2N5457 a couple months back. But I suppose we should get handy with SMD soldering if we want to continue using JFETs in the long term.
I'm betting Steve at Smallbear knew about this with enough time to buy a boatload of each part. I think we'll be in good supply for the foreseeable future. If not, well, then I suppose RunoffGroove is a lot more Mojo than it was yesterday. :icon_mrgreen:
All the more reason for all of us to get to know and trust each other, eh? It won't be long before WE are our only sources of such things.
Sadly element14 hasn't brought in MMBFJ201 :(
Hey, maybe CoolAudio will start making the V201, V5457, etc. :icon_mrgreen:
Quote from: culturejam on January 06, 2012, 12:09:48 PM
I'm betting Steve at Smallbear knew about this with enough time to buy a boatload of each part.
I did, and I have been working on securing supplies of what we Must have to support DIY. But it is going to be difficult down the road.
ok, I just stocked myself with 200 x j201 (I'll need for the spitfire!!),100 x 2n5457 & 100 x 2n5458, lets hope they last a while :-)
Quote from: Jorge_S on January 07, 2012, 01:55:57 AM
ok, I just stocked myself with 200 x j201 (I'll need for the spitfire!!),100 x 2n5457 & 100 x 2n5458, lets hope they last a while :-)
Jorge, can I ask where you got the J201's from ?
Quote from: culturejam on January 06, 2012, 12:09:48 PM
I think we'll be in good supply for the foreseeable future. If not, well, then I suppose RunoffGroove is a lot more Mojo than it was yesterday. :icon_mrgreen:
(http://runoffgroove.com/lolfetzer.jpg)
This seller has quite a few JFETS in quantity. Prices are not the cheapest, but not terrible, either: average is 15-20 cents per piece.
http://myworld.ebay.com/kimfashion4/?_trksid=p4340.l2559
I'm sure Steve will come through with a good supply, too.
Quote from: bean on January 07, 2012, 08:07:35 AM
This seller has quite a few JFETS in quantity. Prices are not the cheapest, but not terrible, either: average is 15-20 cents per piece.
http://myworld.ebay.com/kimfashion4/?_trksid=p4340.l2559
I'm sure Steve will come through with a good supply, too.
That's the supplier I just bought my stuff from. $25 per 200 j201's ($0.125 a piece) + free international shipping. He sells a lot of other stuff too, with 99.9% positives.
Since I am in South America the free shipping made it for me.
Whats the big fuss about?
SMD FETs will still be availible and the are not hard to solder
Quote from: crane on January 07, 2012, 12:19:56 PM
Whats the big fuss about?
SMD FETs will still be availible and the are not hard to solder
Try socketing them...
Quote from: Jorge_S on January 07, 2012, 12:24:58 PM
Quote from: crane on January 07, 2012, 12:19:56 PM
Whats the big fuss about?
SMD FETs will still be availible and the are not hard to solder
Try socketing them...
Or breadboarding them.
soon available: gooped smt fets in a leaded tin can?
time for someone to post a photo tutorial on a diy smd transistor to socket adaptor?
I can imagine a smaller concern stepping in to carry on the manufacture of TO-92 FETs in smaller quantities for the market sectors that still require them. Maybe the product range will have to be rationalised somewhat. There are precedents, such as when Ampex stopped manufacturing audio tape, and everyone thought they'd have to scrap their Studers. It's worth remembering that valves and Ge transistors are still manufactured decades after the big names ceased production.
arghhhhhhhhhhhhhhh don't stop making j201's.......wtf?.........arghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh............... :icon_evil:
They could always be put on a little board like this and used as normal through hole components ;)
(http://i90.photobucket.com/albums/k243/lenny1dog/Untitled-1.jpg)
Or mount a header on the board sideways like this: http://www.tayloredge.com/storefront/SmartNixie/IN17b/1357a.jpg (http://www.tayloredge.com/storefront/SmartNixie/IN17b/1357a.jpg)
Annoying and extraneous for prototyping, yes. Functional and straightforward, yes.
"arghhhhhhhhhhhhhhh don't stop making j201's.......wtf?.........arghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..............."
Well, they haven't stopped making them yet, so at least there's still time to stock up.
^yep i have.. ;)
anyone made an smd breadboard?....mine might be obsolete soon...arggggggggghhhhh again.. ;D
Quote from: Ice-9 on January 07, 2012, 01:36:50 PM
They could always be put on a little board like this and used as normal through hole components ;)
(http://i90.photobucket.com/albums/k243/lenny1dog/Untitled-1.jpg)
You are really digging Dip Trace 3D, aren't you! 8)
I'm gonna need new spectacles for this surface mount lark!
The chaepest i have found the t092 fets are
Rapid have a stock of 2n5457's at £0.05 (5 pence)
http://www.rapidonline.com/SearchResults.aspx?kw=2n5457
Farnell have the J201's at £0.056 (6p ish)
http://uk.farnell.com/fairchild-semiconductor/j201/transistor-jfet-n-to-92/dp/1017715
iv'e bought enough to keep me going as the pedals i build to sell use these.
Edit for price info, forgot to mention you have to but quite a few for these prices
i bought 100 j201's on ebay from a guy in the usa for £10.00 free post to uk too.....and came quick... :icon_cool:
I had ordered like 70 J201's before from Element14 at SGD$0.096 per piece below 10 and 0.087 above 10 and 0.082 above 100 ... naturally i ordered 170 again .
Don't forget BS250 P channel mosfets for Obsidians, BS170 N channel mosfets for Boosters, BOR, etc, and 2N7000 N channel mosfets for having the coolest part number ever. Once they stop making them, the Mojo will increase significantly. ;)
Quote from: WGTP on February 03, 2012, 03:36:23 PM
Don't forget BS250 P channel mosfets for Obsidians, BS170 N channel mosfets for Boosters, BOR, etc, and 2N7000 N channel mosfets for having the coolest part number ever. Once they stop making them, the Mojo will increase significantly. ;)
BS250's are already long gone :icon_neutral:
Only 2N7000 and BS170 will continue production for quite some time .
http://www.ebay.com/itm/20x-MOSFET-Transistor-P-Channel-45V-230mA-BS250-/220906778008?pt=LH_DefaultDomain_2&hash=item336f11ed98#ht_621wt_1165
BS250's 20 @ $8.24
Quote from: iccaros on February 04, 2012, 12:40:09 AM
http://www.ebay.com/itm/20x-MOSFET-Transistor-P-Channel-45V-230mA-BS250-/220906778008?pt=LH_DefaultDomain_2&hash=item336f11ed98#ht_621wt_1165
BS250's 20 @ $8.24
That's bloody expensive :icon_neutral:
I couldn't find it on element14 that's why i said BS250 is no longer in production .
BSS84P is a cheap one for SMD people .
FQP7P06 is the one i bought for non-SMD since it only costs me $USD0.40 .
What about soldering legs onto the SMD Fets?
Quote from: JacktheRiffer on February 06, 2012, 09:04:20 PM
What about soldering legs onto the SMD Fets?
I know about that , but what if the joints desolder when you solder the legs to the board ? ( Well , leadfree to solder the legs and 63/37 to the board ? )
And i have my stuff really small .
Quote from: Govmnt_Lacky on February 07, 2012, 03:14:09 PM
Quote from: DavenPaget on February 07, 2012, 03:04:56 PM
And i have my stuff really small .
::)
That could work or you could loop wire around the legs then solder so its lassoed in place?
instead of the thru hole board you should just make a board like the sip8 to dip8 adaptors with the legs on them.
also, just ordered 100 5457's off of ebay, gonna stock up on a few more too with the next paycheck
Quote from: Seven64 on February 08, 2012, 01:28:11 AM
instead of the thru hole board you should just make a board like the sip8 to dip8 adaptors with the legs on them.
also, just ordered 100 5457's off of ebay, gonna stock up on a few more too with the next paycheck
I order from element14 , cheap and lots of stock left . Ebay is a scam .
Oh and adaptors are pointless , expensive and useless .
Want SMD , go smd .
Please Note:
http://www.smallbearelec.com/Updates.htm
Central Semiconductor and InterFet will continue to offer several TO-92 and even TO-18 types for a while yet, at ruinous prices. InterFet was a wafer fab foundry for several of Fairchild (or maybe Vishay/Siliconix) JFETS over the last few years. I am not sure about distribution or order quantities at this time.
Fairchild announced intention to obsolete these parts about two years ago. Not sure about Vishay/Siliconix.
This whole thing makes me look at Siliconix's "Designing with Feild Effect Transistors" and think they are traitors. ???
Sean
My question with all of the through-hole components becoming harder and harder to find is, even if I do learn to work with and solder SMD, how does one ever breadboard with that stuff!? Without being able to breadboard, I can't really see tinkering with electronics, personally.
Should this really be a concern after all? Do hobbist shops like smallbear and jameco demonstrate the small market of hobbyists, and hence we can expect parts to be available and made by someone somewhere willing to make small-scale dollars?
I try not to worry about the future, but I do, and I also think I may as well start moving to SMD myself if it's inevitable...stocking up on lifetime supplies of through-hole parts so I can continue to work on electronics seems futile and pathetic, and sad either way.
Steve, you the man. :icon_mrgreen:
Quote from: liquids on February 14, 2012, 03:29:11 PM
My question with all of the through-hole components becoming harder and harder to find is, even if I do learn to work with and solder SMD, how does one ever breadboard with that stuff!? Without being able to breadboard, I can't really see tinkering with electronics, personally.
Should this really be a concern after all? Do hobbist shops like smallbear and jameco demonstrate the small market of hobbyists, and hence we can expect parts to be available and made by someone somewhere willing to make small-scale dollars?
I try not to worry about the future, but I do, and I also think I may as well start moving to SMD myself if it's inevitable...stocking up on lifetime supplies of through-hole parts so I can continue to work on electronics seems futile and pathetic, and sad either way.
You might not be able to breadboard anything but you can run a sim and build a pcboard just to test . Or have some spare parts lying around ( like a few J201's ) for breadboarding and convert it to SMD .
That's the easiest way .
If you can solder a wire to it, you can bread board with it.
For what it is worth, I have ended up with boatloads of these things.
is it worth sending a pretty please begging letter? :P
Quote from: boogietone on February 15, 2012, 10:52:40 AM
For what it is worth, I have ended up with boatloads of these things.
"these" you mean TO-92 JFETS ?
Quote from: defaced on February 15, 2012, 10:49:39 AM
If you can solder a wire to it, you can bread board with it.
You can but how would you hold the chip ? You can't .
So just use the through hole equivalents , and use the SMD ones .
Likewise saying , keep the through hole stuff only for testing , SMD for the real stuff .
Oh and do not attempt to use SMD J201's now . Either they don't exist (MMBFJ201) or (SST201) is overly expensive .
QuoteYou can but how would you hold the chip ? You can't .
Hold the chip? What? You're making it too hard.
Take a SMD transistor, solder three solid wires to it, stuff it in a bread board. Done.
Quote from: DavenPaget on February 15, 2012, 01:18:25 PM
Oh and do not attempt to use SMD J201's now . Either they don't exist (MMBFJ201) or (SST201) is overly expensive .
They are available and they are cheap MMBFJ201 £0.075 thats cheap digikey
Quote from: defaced on February 15, 2012, 01:45:09 PM
QuoteYou can but how would you hold the chip ? You can't .
Hold the chip? What? You're making it too hard.
Take a SMD transistor, solder three solid wires to it, stuff it in a bread board. Done.
Okay...while that might only be generally annoying for a fet...14 pin CMOS chips would be a whole new level of nuisance...and solder is not a very reliable connector, mechanically speaking...ah well.
SMT to DIP adapters, as already discussed, exist.
The solder connection only has to last long enough to bread board an idea. It's mechanical properties will do just fine for a plastic bread board sitting on a desk. Necessity is the mother of invention. It is generally much more productive to find solutions to problems than point out/dream up problems with approaches.
dang those pesky kids with their loud music and ever shrinking technology. get off of my lawn!
Quote from: defaced on February 15, 2012, 10:49:39 AM
If you can solder a wire to it, you can bread board with it.
Not my finest photography, but I think it illustrates the point.
(http://img571.imageshack.us/img571/1719/smtforbreadboard.jpg)
Quote from: Ice-9 on February 15, 2012, 01:54:29 PM
Quote from: DavenPaget on February 15, 2012, 01:18:25 PM
Oh and do not attempt to use SMD J201's now . Either they don't exist (MMBFJ201) or (SST201) is overly expensive .
They are available and they are cheap MMBFJ201 £0.075 thats cheap digikey
At least on where is near me , on element14 . But i should consider that's 0.075 means SGD$0.15 HMM . I think i'll be better off with SST201's now ... they're still 30 cents whole lot more then a J201
Quote from: defaced on February 15, 2012, 09:52:42 PM
Quote from: defaced on February 15, 2012, 10:49:39 AM
If you can solder a wire to it, you can bread board with it.
Not my finest photography, but I think it illustrates the point.
(http://img571.imageshack.us/img571/1719/smtforbreadboard.jpg)
OK , i get the point now , the perfboard idea is great . just great .
Quote from: DavenPaget on February 16, 2012, 02:07:31 PM
Quote from: Ice-9 on February 15, 2012, 01:54:29 PM
Quote from: DavenPaget on February 15, 2012, 01:18:25 PM
Oh and do not attempt to use SMD J201's now . Either they don't exist (MMBFJ201) or (SST201) is overly expensive .
They are available and they are cheap MMBFJ201 £0.075 thats cheap digikey
At least on where is near me , on element14 . But i should consider that's 0.075 means SGD$0.15 HMM . I think i'll be better off with SST201's now ... they're still 30 cents whole lot more then a J201
From my working out 1 spd = about £.050 GBP which means you would get 6 mmbfj201's for you dollar, thats good for me but not Singapore. sorry.
I was wrong . The SST201 costs SGD$1.22
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
Quote from: DavenPaget on February 16, 2012, 02:09:51 PM
Quote from: defaced on February 15, 2012, 09:52:42 PM
Quote from: defaced on February 15, 2012, 10:49:39 AM
If you can solder a wire to it, you can bread board with it.
Not my finest photography, but I think it illustrates the point.
(http://img571.imageshack.us/img571/1719/smtforbreadboard.jpg)
OK , i get the point now , the perfboard idea is great . just great .
How difficult was it to solder legs onto the fet?
Not really because I tinned the wire first leaving a small amount of solder behind. Align, add a little heat, done.
Quote from: dthurstan on February 21, 2012, 03:09:05 AM
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
If SMD is obsolete , we can't do electronics anymore !
You actually believe such "Education" website's rubbish they constantly write and never get any further ?
EDIT : They are talking about the internals of a CPU .
SMD will remain existant and useful , there's no better mounting technique .
Quote from: DavenPaget on February 21, 2012, 05:23:32 PM
Quote from: dthurstan on February 21, 2012, 03:09:05 AM
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
If SMD is obsolete , we can't do electronics anymore !
You actually believe such "Education" website's rubbish they constantly write and never get any further ?
EDIT : They are talking about the internals of a CPU .
SMD will remain existant and useful , there's no better mounting technique .
To quote a comment elsewhere about this:
"Scientists in search of nanocomputers succeed in making a transistor out of just a single atom, 50 feet of stainless steel tubing, and a hundred liters of liquid helium.
Win!" [Truman North]
Italics mine.
Quote from: defaced on February 15, 2012, 09:52:42 PM
]Not my finest photography, but I think it illustrates the point.
Now alls you needs to do is dip them in catalyzed epoxy. :icon_biggrin:
Quote from: boogietone on February 21, 2012, 05:32:03 PM
Quote from: DavenPaget on February 21, 2012, 05:23:32 PM
Quote from: dthurstan on February 21, 2012, 03:09:05 AM
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
If SMD is obsolete , we can't do electronics anymore !
You actually believe such "Education" website's rubbish they constantly write and never get any further ?
EDIT : They are talking about the internals of a CPU .
SMD will remain existant and useful , there's no better mounting technique .
To quote a comment elsewhere about this:
"Scientists in search of nanocomputers succeed in making a transistor out of just a single atom, 50 feet of stainless steel tubing, and a hundred liters of liquid helium. Win!" [Truman North]
Italics mine.
Scientists do not know the real world . How the hell are hobbyists or most EE's going to see the transistor ? Don't get me started on the very limited power dissipation !
I have considered that very idea R.G.
Quote from: DavenPaget on February 22, 2012, 02:43:26 AM
Quote from: boogietone on February 21, 2012, 05:32:03 PM
Quote from: DavenPaget on February 21, 2012, 05:23:32 PM
Quote from: dthurstan on February 21, 2012, 03:09:05 AM
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
If SMD is obsolete , we can't do electronics anymore !
You actually believe such "Education" website's rubbish they constantly write and never get any further ?
EDIT : They are talking about the internals of a CPU .
SMD will remain existant and useful , there's no better mounting technique .
To quote a comment elsewhere about this:
"Scientists in search of nanocomputers succeed in making a transistor out of just a single atom, 50 feet of stainless steel tubing, and a hundred liters of liquid helium. Win!" [Truman North]
Italics mine.
Scientists do not know the real world . How the hell are hobbyists or most EE's going to see the transistor ? Don't get me started on the very limited power dissipation !
Um, how do we see the transistors on the surface of the CPU dies mad with 32 micro meter technology that's common today? You and I certainly can't. People with expensive machines take a wafer covered in the itty bitty transistors and stuff it in a plastic case, and presto, we have something to work with.
Considering it's Hertz's birthday, it's funny you mention scientists. The scientists of yesteryear who "didn't know the real world", guys like Hertz who wanted to communicate through the air with stuff you couldn't see, got you things like radio, tubes, your beloved J201, and the CPU that's currently being made with 35 micro meter technology. Maybe this exact permutation of the single atom transistor isn't practical, but every great idea has to start with a "proof of concept" to get anywhere.
Quote from: defaced on February 22, 2012, 09:37:56 AM
Um, how do we see the transistors on the surface of the CPU dies mad with 32 micro meter technology that's common today? You and I certainly can't. People with expensive machines take a wafer covered in the itty bitty transistors and stuff it in a plastic case, and presto, we have something to work with.
Considering it's Hertz's birthday, it's funny you mention scientists. The scientists of yesteryear who "didn't know the real world", guys like Hertz who wanted to communicate through the air with stuff you couldn't see, got you things like radio, tubes, your beloved J201, and the CPU that's currently being made with 35 micro meter technology. Maybe this exact permutation of the single atom transistor isn't practical, but every great idea has to start with a "proof of concept" to get anywhere.
it's 32nano-meter . They are all 28nano-meter now .
I know Hertz did all that , but what about the "scientists" who stay in their lab most of the time ?
They are almost always the ones who bring a concept but never manage to make it real .
My bad, you're right, it is nano. 32 or 28 nm, the fundamental point is still valid, you and I can't see the transistors on that CPU die, but you and I can take a CPU and use it. Same thing with this single atom transistor. If it can be developed and practically used, it'll be stuffed in a package and one day you and I can hold a bagazillion transistors in our hand.
QuoteI know Hertz did all that , but what about the "scientists" who stay in their lab most of the time ? They are almost always the ones who bring a concept but never manage to make it real .
What do you think Hertz did? In between teaching, he hung out in his lab and played with stuff until he proved something; that's what scientists do. He never made a product to sell, but yet we have radio today. So how did that happen? Someone's got to figure everything out, that's the scientist. Someone's got to see the science and find a practical application for it, that's the inventor. Someone's got to figure out how to make it, those are the manufacturing engineers. And someone has to figure out how to sell it, our beloved marketing folk can't be left out. Very rarely can a single person do all of those things. I think this line from Hertz wiki entry nicely illustrates the difference between primary research and invention/product development:
QuoteHertz's experiments would soon trigger the invention of the wireless telegraph, radio, and later television.
Quote from: R.G. on February 21, 2012, 06:52:47 PM
Quote from: defaced on February 15, 2012, 09:52:42 PM
]Not my finest photography, but I think it illustrates the point.
Now alls you needs to do is dip them in catalyzed epoxy. :icon_biggrin:
..and sell the as "magic-mojo-part"... :P
Quote from: defaced on February 22, 2012, 10:59:56 AM
My bad, you're right, it is nano. 32 or 28 nm, the fundamental point is still valid, you and I can't see the transistors on that CPU die, but you and I can take a CPU and use it. Same thing with this single atom transistor. If it can be developed and practically used, it'll be stuffed in a package and one day you and I can hold a bagazillion transistors in our hand.
QuoteI know Hertz did all that , but what about the "scientists" who stay in their lab most of the time ? They are almost always the ones who bring a concept but never manage to make it real .
What do you think Hertz did? In between teaching, he hung out in his lab and played with stuff until he proved something; that's what scientists do. He never made a product to sell, but yet we have radio today. So how did that happen? Someone's got to figure everything out, that's the scientist. Someone's got to see the science and find a practical application for it, that's the inventor. Someone's got to figure out how to make it, those are the manufacturing engineers. And someone has to figure out how to sell it, our beloved marketing folk can't be left out. Very rarely can a single person do all of those things. I think this line from Hertz wiki entry nicely illustrates the difference between primary research and invention/product development:
QuoteHertz's experiments would soon trigger the invention of the wireless telegraph, radio, and later television.
Yeahyeah ... Don't forget the EE's ... They make them real .
The reason i replied to him saying what i said was because he said "smd maybe obsolete now"
Quote from: DavenPaget on February 21, 2012, 05:23:32 PM
Quote from: dthurstan on February 21, 2012, 03:09:05 AM
Looks like smd maybe obsolete now too.
http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html (http://www.purdue.edu/newsroom/research/2012/120219KlimeckAtom.html)
Should be fun trying to solder these... oh no I've just burnt a million transistors!
If SMD is obsolete , we can't do electronics anymore !
You actually believe such "Education" website's rubbish they constantly write and never get any further ?
EDIT : They are talking about the internals of a CPU .
SMD will remain existant and useful , there's no better mounting technique .
yeah I know... :), sorry I should of put a smiley face after that. I just saw it, thought it was cool. It is going of on a tangent though.
Quote from: Johan on February 22, 2012, 11:19:40 AM
..and sell the as "magic-mojo-part"... :P
Yeah - only the green ones are any good. :icon_lol:
Do you match them after soldering the legs ? :icon_rolleyes:
Quote from: frank_p on February 22, 2012, 07:04:43 PM
Do you match them after soldering the legs ? :icon_rolleyes:
Don't forget there's actually a jfet inside it :icon_mrgreen: