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Path: ...!weretis.net!feeder9.news.weretis.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!nnrp.usenet.blueworldhosting.com!.POSTED!not-for-mail From: "Edward Rawde" <invalid@invalid.invalid> Newsgroups: sci.electronics.design Subject: Re: kids these days Date: Mon, 30 Sep 2024 13:21:56 -0400 Organization: BWH Usenet Archive (https://usenet.blueworldhosting.com) Lines: 331 Message-ID: <vdemnl$d40$1@nnrp.usenet.blueworldhosting.com> References: <v1rbfj18eqbgr1t9bfvdfqqmn1q91gcfof@4ax.com> <vd5r5k$q48h$1@solani.org> <d56ifj1angpnq16qhhb0vplmlr3tt7opnf@4ax.com> <vdbkap$tc4m$1@solani.org> <kb3jfjpejs47hqjd00fis20eog8de19ae8@4ax.com> <vddc4m$u7hu$1@solani.org> <l6ukfjl7m6q3eiki81t4ln3lr50057obl4@4ax.com> <7bglfjtll1os4g6pfqhf1i7jl0acmrvlqv@4ax.com> Injection-Date: Mon, 30 Sep 2024 17:21:57 -0000 (UTC) Injection-Info: nnrp.usenet.blueworldhosting.com; logging-data="13440"; mail-complaints-to="usenet@blueworldhosting.com" Cancel-Lock: sha1:sDGrOXwMnvhSx2rJVRNzDYf+7KU= sha256:Kivw3l07of4nT/01agEMvAm61aWqtXAQkDYULrkXIho= sha1:eKWBnTPraMprsPOSoLNC+zZs+KU= sha256:58US60HFBnmm1Ki2DZi6o6h4642JLp1VPKprqd5SSMg= X-Priority: 3 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-RFC2646: Format=Flowed; Original X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.5931 Bytes: 9972 "john larkin" <JL@gct.com> wrote in message news:7bglfjtll1os4g6pfqhf1i7jl0acmrvlqv@4ax.com... > On Mon, 30 Sep 2024 11:13:56 +0100, Cursitor Doom <cd@notformail.com> > wrote: > >>On Mon, 30 Sep 2024 05:15:02 GMT, Jan Panteltje <alien@comet.invalid> >>wrote: >> >>>On a sunny day (Sun, 29 Sep 2024 10:36:26 -0700) it happened john larkin >>><JL@gct.com> wrote in <kb3jfjpejs47hqjd00fis20eog8de19ae8@4ax.com>: >>> >>>>I wouldn't hire someone who complicates a simple question into >>>>paralysis. >>>> >>>> >>>>I draw a 10 volt battery connected to two resistors, 9K in series with 1K. >>> >>>The problem there is 'draw', no reality. >>>The battery will have an internal resistance, maybe discharged too. >>> >>>>What's the voltage across the 1K? >>> >>> >>> >>>>I hired a 3-month intern a month ago who failed the test. He said 9 >>>>volts. I hired him anyway and fired him as an intern on Friday. He's >>>>full time now. He's mostly a software engineer. I'm teaching him basic >>>>electronics now. >>> >>>Well, that is OK. >>>But needs experimenting, building circuits, else all vaporware. >>>Same with software, write it, test it, else just imagination... >>>It may not be / work for everybody.. >>>Some run for US precedent.. >>>When I have to believe the crap trump puts out these days (about Iran for example) >>>4 sure (or maybe even 00 sure <where 00 is the symbol for infinite> ) we will have >>>WW3 no matter who is winning the electtions. >>> >>> >>>>I dream of some day finding a kid who gets the voltage divider right >>>>and has something intelligent so say about the next test, an NPN >>>>emitter follower. >>> >>>Ge or Si? >> >>John mentioned a Vb of 0.6V so the 'student' is expected to know it's >>silicon. And of course, it's a Vbe of 0.6V and that distinction seems >>to trip up a lot of young folks, it seems. The Vb is 5. Once they get >>that straight, the rest of it falls into place easily enough. Should >>take < 30s for someone to figure out - and hopefully <<! > > No, I said that one EE grad claimed that Vb (not Vbe) would be 0.6 > volts to ground. > > Can anyone here say about what the base and emitter voltages actually > are? Collector current? > > +10 supply, two 10Ks making a divider into the base, 1K emitter to > ground, typical small silicon NPN. > > Extra credit: anything else to say? Why not ask about the essential features of the circuit below. Extra credit: What's it for? Knowledge of things which were useful decades ago may not be so useful now. How many students think that knowing how to design circuits like the one below will help them make money? Version 4 SHEET 1 960 1280 WIRE -272 -144 -400 -144 WIRE 112 -144 -272 -144 WIRE 352 -144 112 -144 WIRE 544 -144 352 -144 WIRE -272 -96 -272 -144 WIRE 112 -96 112 -144 WIRE 352 -96 352 -144 WIRE 544 -16 544 -144 WIRE -272 16 -272 -32 WIRE 112 16 112 -16 WIRE 192 16 112 16 WIRE 352 32 352 -16 WIRE 480 32 352 32 WIRE 112 64 112 16 WIRE 192 112 192 80 WIRE 64 128 16 128 WIRE 112 192 112 160 WIRE 240 208 208 208 WIRE 544 208 544 80 WIRE 544 208 304 208 WIRE -400 256 -400 -144 WIRE 352 272 352 32 WIRE 16 304 16 128 WIRE 112 304 112 272 WIRE 112 304 16 304 WIRE 112 320 112 304 WIRE 208 320 208 208 WIRE 208 320 112 320 WIRE 288 320 208 320 WIRE 112 352 112 320 WIRE -288 400 -576 400 WIRE -240 400 -288 400 WIRE -224 400 -240 400 WIRE -128 400 -160 400 WIRE -16 400 -48 400 WIRE 48 400 -16 400 WIRE 352 400 352 368 WIRE 544 480 544 208 WIRE 592 480 544 480 WIRE 688 480 656 480 WIRE 832 480 768 480 WIRE 880 480 832 480 WIRE -16 496 -16 400 WIRE 16 496 -16 496 WIRE 112 496 112 448 WIRE 112 496 80 496 WIRE 112 512 112 496 WIRE 224 512 112 512 WIRE 352 512 352 480 WIRE 432 512 352 512 WIRE -240 528 -240 400 WIRE -16 528 -16 496 WIRE 112 528 112 512 WIRE 352 528 352 512 WIRE -576 608 -576 400 WIRE 832 608 832 480 WIRE -16 656 -16 608 WIRE 352 656 352 608 WIRE 352 656 -16 656 WIRE 544 672 544 480 WIRE 688 672 544 672 WIRE 112 688 112 608 WIRE 112 688 -16 688 WIRE 112 704 112 688 WIRE 352 704 352 656 WIRE 544 704 544 672 WIRE -16 720 -16 688 WIRE 432 720 432 512 WIRE 688 720 688 672 WIRE -576 832 -576 688 WIRE -400 832 -400 336 WIRE -400 832 -576 832 WIRE -240 832 -240 608 WIRE -240 832 -400 832 WIRE -16 832 -16 784 WIRE -16 832 -240 832 WIRE 112 832 112 784 WIRE 112 832 -16 832 WIRE 352 832 352 784 WIRE 352 832 112 832 WIRE 432 832 432 784 WIRE 432 832 352 832 WIRE 544 832 544 784 WIRE 544 832 432 832 WIRE 832 832 832 688 WIRE 832 832 544 832 WIRE -576 880 -576 832 WIRE 224 896 224 512 WIRE 256 896 224 896 WIRE 496 896 336 896 WIRE 544 896 496 896 WIRE 688 896 688 784 WIRE 688 896 624 896 WIRE 224 1024 224 896 WIRE 256 1024 224 1024 WIRE 368 1024 336 1024 WIRE 400 1024 368 1024 WIRE 496 1024 496 896 WIRE 496 1024 464 1024 WIRE 224 1136 224 1024 WIRE 256 1136 224 1136 WIRE 368 1136 368 1024 WIRE 368 1136 320 1136 FLAG -576 880 0 FLAG 192 112 0 FLAG -288 400 input FLAG -272 16 0 FLAG 832 480 output SYMBOL pjf 64 64 R0 ========== REMAINDER OF ARTICLE TRUNCATED ==========