Unusual functions of cheap parts
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From: Steven Swift on 24 Dec 2005 11:53 Back when one of my tasks at Fluke was to interview college recruits, I was asked to describe my job as an Analog Design Engineer. My answer: "To design precision instruments using cheap, junk parts." A tip of the hat to Norm Strong... Steve. -- Steven D. Swift, novatech(a)eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA
From: Winfield Hill on 24 Dec 2005 21:51 Michael A. Terrell wrote... > > Winfield Hill wrote: >> >> Michael A. Terrell wrote... >>> >>> How many do you need, and can you use ones pulled from PC boards? >>> I may have some left that I pulled from damaged boards. >> >> One or two may be enough for proof-of-principle measurements. > > I'll see if I can find a couple for you. OK, I'll trade you some 1500V damper diodes, with datasheets. They should be interesting additions to your parts inventory. -- Thanks, - Win
From: Roberto Waltman on 17 Jan 2006 19:00 <otc_friend(a)gmx.net> wrote: >Do you know of other interesting devices or circuits good for misuse? Old thread, but still worth answering. * Small signal germanium transistors in glass packaging, (OC45 comes to memory, TO1 package,) make good photodetectors after scrapping the paint. * Zener diodes are good noise generators (This is widely known and used.) * Some small (toy) dc motors wired in series with a speaker make good siren sounds. Roberto Waltman [ Please reply to the group, ] [ return address is invalid. ]
From: Michael A. Terrell on 22 Jan 2006 08:57 Winfield Hill wrote: > > Michael A. Terrell wrote... > > > > Winfield Hill wrote: > >> > >> Michael A. Terrell wrote... > >>> > >>> How many do you need, and can you use ones pulled from PC boards? > >>> I may have some left that I pulled from damaged boards. > >> > >> One or two may be enough for proof-of-principle measurements. > > > > I'll see if I can find a couple for you. > > OK, I'll trade you some 1500V damper diodes, with datasheets. > They should be interesting additions to your parts inventory. > > -- > Thanks, > - Win Win, I did a lot of digging and the best I can find is five glass 1N4004s. I have either used up all of the glass 1N4007s, or didn't but them back into the right place the last time I used some of them. Are they high enough voltage to test your circuit? If they are, E-mail me with a shipping address, and I'll send them to you. I appreciate the offer of the parts, but I am to the point that I don't feel well enough to do anything at my workbench. It has been about 18 months since I felt like trying to do anything, and most of my test equipment was water damaged in the 2004 hurricanes. Its just too depressing to try to work with what little is left. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida
From: clifto on 22 Jan 2006 16:13
Michael A. Terrell wrote: > I appreciate the > offer of the parts, but I am to the point that I don't feel well enough > to do anything at my workbench. It has been about 18 months since I felt > like trying to do anything, and most of my test equipment was water > damaged in the 2004 hurricanes. Its just too depressing to try to work > with what little is left. That sucks. Sorry it happened to you. -- If John McCain gets the 2008 Republican Presidential nomination, my vote for President will be a write-in for Jiang Zemin. |