<div dir="ltr"><div><div><div>I was looking up something else, and ran into diagrams that reminded me of this discussion ...<br><br></div>I don't know who plagiarized from whom, but here is the same diagrams on a Basic Electronics website: <a href="https://www.slideshare.net/DanielMusyoka1/basic-electronics-39643994">https://www.slideshare.net/DanielMusyoka1/basic-electronics-39643994</a> (slide 21 of 54)<br><br></div>Also there is a massive mess of other diagrams (and their associated books and/or websites) by searching Google images: <a href="https://www.google.com/search?newwindow=1&site=&tbm=isch&source=hp&biw=1216&bih=897&q=npn+water+analogy&oq=npn+water+analogy&gs_l=img.12...12226.25175.0.28832.23.8.2.13.15.0.120.676.0j6.6.0....0...1ac.1.64.img..2.6.676.0..0j0i5i30k1j0i8i30k1j0i24k1.QIxB8gT7zuI">https://www.google.com/search?newwindow=1&site=&tbm=isch&source=hp&biw=1216&bih=897&q=npn+water+analogy&oq=npn+water+analogy&gs_l=img.12...12226.25175.0.28832.23.8.2.13.15.0.120.676.0j6.6.0....0...1ac.1.64.img..2.6.676.0..0j0i5i30k1j0i8i30k1j0i24k1.QIxB8gT7zuI</a><br><br></div>- sgh<br><div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 10, 2017 at 1:52 PM, Pete Soper via TriEmbed <span dir="ltr"><<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
<br>
On 03/10/2017 12:54 PM, Brian via TriEmbed wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Anybody else notice that the "pulley system" for the PNP diagram is mechanically wrong? A single pulley like that would have the E-C door /closing/ as the E-B door opened. Not to mention the magical semi-rigid string that can transmit a compressing force...<br>
</blockquote></span>
Good catch! I only have access to the 3rd edition. Does somebody have the 4th edition to say whether it's been fixed? Looking up the figure using Mike's link only shows the bottom few characters of the figure for me.<br>
<br>
Maybe they figure gravity will obviate the need for a compressible string if you hold the book upright. :-)<br>
<br>
Also, the bias springs in the 3rd edition are drawn like the type that would resist tension but obviously need to be resisting compression. And what is the little black knob on the end of the NPN's base door supposed to be?<br>
<br>
What's to keep the CE junction "trap door" for the PNP being so far up that the connection to the base door is via rigid rod (hinged on both ends)? If I redraw it this way the notion of emitter current being shared by both base and collector is preserved, so I wonder what led them to even use a pulley (without thinking it through)?<br>
<br>
I can't bring myself to rip off this drawing, but making improved versions seems very OK at the moment.<span class="HOEnZb"><font color="#888888"><br>
<br>
-Pete</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
XD<br>
<br>
-B<br>
<br>
<br>
On 03/10/2017 12:14 PM, Pete Soper via TriEmbed wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Too funny. The horrible <a href="http://images.googlee.com" rel="noreferrer" target="_blank">images.googlee.com</a> graphic I was looking at made<br>
me guess it was many decades old. But it's on Page 436 of the third<br>
edition copy. That's just exactly what was after. THANKS!<br>
-Pete<br>
<br>
On 03/10/2017 11:59 AM, Mike Lisanke wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Look's like<br>
<br>
<a href="https://books.google.com/books?id=lhSCCwAAQBAJ&q=NPN+Water+Analogy&dq=NPN+Water+Analogy&hl=en&sa=X&ved=0ahUKEwjFruWdtMzSAhWIWSYKHdYECQYQ6AEIHDAA" rel="noreferrer" target="_blank">https://books.google.com/books<wbr>?id=lhSCCwAAQBAJ&q=NPN+Water+<wbr>Analogy&dq=NPN+Water+Analogy&<wbr>hl=en&sa=X&ved=0ahUKEwjFruWdtM<wbr>zSAhWIWSYKHdYECQYQ6AEIHDAA</a> <br>
<br>
<br>
Practical Electronics for Inventors, Fourth Edition<br>
<br>
<br>
On Fri, Mar 10, 2017 at 11:40 AM, Pete Soper via TriEmbed<br>
<<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a> <mailto:<a href="mailto:triembed@triembed.org" target="_blank">triembed@triembed.org</a>><wbr>> wrote:<br>
<br>
Can anybody help me identify the book this explanation of junction<br>
transistors comes from?<br>
<br>
<a href="http://web.mnstate.edu/lindaas/explore/docs/Transistor2.pdf" rel="noreferrer" target="_blank">http://web.mnstate.edu/lindaas<wbr>/explore/docs/Transistor2.pdf</a><br>
<<a href="http://web.mnstate.edu/lindaas/explore/docs/Transistor2.pdf" rel="noreferrer" target="_blank">http://web.mnstate.edu/lindaa<wbr>s/explore/docs/Transistor2.pdf</a><wbr>><br>
<br>
Thanks,<br>
Pete<br>
PS Meeting Monday: See "March 13" blog page at <a href="http://TriEmbed.org" rel="noreferrer" target="_blank">http://TriEmbed.org</a><br>
<br>
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</blockquote>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Scott G. Hall<br>Raleigh, NC, USA<br><a href="mailto:scottghall1@gmail.com" target="_blank">scottghall1@gmail.com</a></div>
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