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<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>Seeing this discussion, I feel compelled to share my process
for making PCBs. I'll use a fairly simple one (a dual voltage-controlled
crossfader) as an example.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>First, the schematic, drawn in Multisim (for one of two
identical channels):</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><IMG border=0 hspace=0
alt="" align=baseline src="cid:905444917@31102020-0CAF"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>Next, the Layout -- Red is +15V, Black is -15V, Green is GND,
Yellow is +5V, Orange is -5V, and (mostly) pink is everything else, although I
do use other colours for clarity on occasion. All resistors and diodes are
0.4" unless it absolutely cannot be avoided. The thick dark blue lines are
wire jumpers:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><IMG border=0 hspace=0
alt="" align=baseline src="cid:905444917@31102020-0CA8"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>For this circuit, this layout took me probaby about half an
hour to do. Of course, I'm starting from an existing layout, so all the
parts are already made and it's just a matter of moving things around (on a
"Snap-to-Grid" basis), and possibly opening up another layout file to get a part
that I needed that wasn't on the one I started with. Actually organizing
the circuit from the schematic for a circuit like this is very fast for me,
because I always use the same layout scheme for analog circuits (a 2.1"
wide PCB, chips down the middle, then one row on either side for stability
caps and other connections, then the resistors and diodes with up to 3
traces running underneath for signal flow, then the connector row, then
ground).</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>Next, I copy this and erase all the traces, just leaving the
Parts. From this, I can copy all the parts over to the BOM and line them
up for quick and easy retrieval from the parts bins:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><IMG border=0 hspace=0
alt="" align=baseline src="cid:905444917@31102020-0CB6"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>Next, I copy the Layout again and remove all the parts, then
build up the Traces using a scheme involving up to 5 different layers. For
this part, the erasing of the parts takes the most time. Building up the
trace layers for a board this size takes me less than two minutes. Note
how the power traces are thicker than the signal traces. Also note the
rounded corners on all the traces.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><IMG border=0 hspace=0
alt="" align=baseline src="cid:905444917@31102020-0CBD"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial>Next, I build up the Pads by superimposing special circular
images over all the connections on the Parts picture. Again, I'm always
starting from another layout. This part generally takes less than two
minutes. Mounting holes, power headers, MTA connectors, and parts all have
their own pad sizes:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><IMG border=0 hspace=0
alt="" align=baseline src="cid:905444917@31102020-0CC4"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT size=2
face=Arial>The rest will be shown in a subsequent message (cuz otherwise it'll
be too long for Synth-DIY).</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=905444917-31102020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Synth-diy
[mailto:synth-diy-bounces@synth-diy.org] <B>On Behalf Of
</B>sleepy_dog@gmx.de<BR><B>Sent:</B> Saturday, October 31, 2020 4:57
AM<BR><B>To:</B> synth-diy@synth-diy.org<BR><B>Subject:</B> Re: [sdiy] favorite
Youtube genre - "old guys repairing electronics"<BR></FONT><BR></DIV>
<DIV></DIV><SPAN
style="BACKGROUND-COLOR: #ffecb3; COLOR: #000000; FONT-SIZE: 12px"><SPAN
style="BACKGROUND-COLOR: #ffecb3; COLOR: #000000; FONT-SIZE: 12px"><SPAN
style="PADDING-BOTTOM: 3px; LINE-HEIGHT: 1.6; BACKGROUND-COLOR: #ffecb3; FONT-STYLE: normal; PADDING-LEFT: 3px; PADDING-RIGHT: 3px; COLOR: #000000; FONT-SIZE: 12px; FONT-WEIGHT: normal; PADDING-TOP: 3px">[<STRONG>CAUTION:</STRONG>
Non-UBC Email]</SPAN></SPAN></SPAN>
<DIV class=moz-cite-prefix><BR>Heh. If I need something quickly, cant wait for
PCB, but also it does have certain physical dimension requirements,<BR>then I do
get really "boring" and do "plan" perfboard - "what is the fun in that" someone
asked - indeed, what is the fun in that sort of tedious, repetitive work
alltogether?<BR>Better make it as short as, and least error prone possible. It's
so much easier to reason about misbehavior of a circuit if it actually matches
what you have drawn - at least from the obvious (not parasitic) components and
their supposed connections.<BR>While it's perhaps reasonabnly unlikely to make
mistakes if you have all the space in the world and basically solder together
the circuit as-is-drawn on some big ass perfboard, also leaving lots of room for
adding more stuff to experiment,<BR>as things get more crowded and less
intuitively placed, I found the following to be helpful:<BR><BR>First of all,
esp. for single-sided perfboard, I like to combine THT ICs with SMT 0805
passives, as you can often put them comfortably between legs and under the IC
(on the bottom side of the board), that already saves a lot of space - and
wiring effort.<BR>There are also these, often green, plated-through double-sided
perfboards - may reduce the insulated connections you have to make (which take
longer due to the need for burning away the insulation / tinning), e.g. all GND
with silver wire on the bottom, +V on the top side, or so, other nets with
insulated wire, where unconnected crossings would be at least.<BR><BR>Also, in
the type of scenario where I would, if I could, prefer a small PCB, but don't
want to wait,<BR>I might already have a captured schematic in my chosen EDA
software anyway - or if it's small, I'll just do it quickly.<BR>Then convert to
PCB, and usually don't route anything, or at best a few special traces to mark
special preferences.<BR><BR>I put that on my small-ish tablet with stylus
support, that actually fits on my crowded soldering bench.<BR>that also runs the
EDA software. Then I:<BR><BR>foreach non-GND-net:<BR>
highlight net in PCB software<BR> connect all net points in
circuit with insulated "coil wire", point-to-point<BR> hide
net's ratlines (or color existing traces) to make visible what's still TODO -
this shrinks more and more, and you can see the light at the end of the
tunnel<BR><BR>This, for me anyway, proved much less error prone than staring on
a paper printout and comparing it with the current physical as-is schematic all
the time (even when pencil checking traces ;) ).<BR>Can basically do that
half-asleep without making a mistake. (just make sure to display the bottom side
mirrored appropriately :D)<BR><BR>Then for the GND net I do the above, except I
user silver coated copper wire, a bit sturdier, and wherever possible, do not
cut, but bend around corners, using one long piece of wire across many
connections, saving some work steps. The silver wire will be over all those coil
wires, holding them in place a bit better, esp. longer ones, and make it less
likely that you will rip off any connection by accidentally grabbing too hard
anywhere.<BR><BR><BR>- Steve<BR><BR><BR>Am 31.10.2020 um 11:23 schrieb
ShedSynth:<BR></DIV>
<BLOCKQUOTE cite=mid:067401d6af6f$e27cd1f0$a77675d0$@gmail.com type="cite">
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<DIV class=WordSection1>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">Hi
all.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I use perfboard,
but I don’t try to make it into a PCB.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I wire
point-to-point with single core Kynar wire, normally used for
wire-wrapping.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I use blue,
black, red and yellow on the back for -12V, GND, +5V and
+12V.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I use green for
all signals, always on the component side.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I lay out the big
things like pots, DIL sockets and capacitors on the board itself, and always
try to leave rows of 4 holes to place resistors flat.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">Then I follow the
schematic, which might take several days – this isn’t a mass-production
process.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">I separate each
functional block with a pair of pins + a jumper so I can test on the scope as
I go and also so I can bodge blocks of completed circuits into something
else.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">Hope this might
help somebody,<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN
style="mso-fareast-language: EN-US">Al<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN
style="mso-fareast-language: EN-US"><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">If the picture
comes through, it’s most of a Thomas Henry MAXIMUS 3340
VCO.<O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN style="mso-fareast-language: EN-US">The front is just
as ugly.<O:P></O:P></SPAN></P>
<P class=MsoNormal><IMG style="WIDTH: 3.281in; HEIGHT: 4.718in"
id=Picture_x0020_3 src="cid:905444917@31102020-0C9A" width=315
height=453><SPAN style="mso-fareast-language: EN-US"><O:P></O:P></SPAN></P>
<P class=MsoNormal><SPAN
style="mso-fareast-language: EN-US"><O:P></O:P></SPAN></P>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; PADDING-RIGHT: 0cm; BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P class=MsoNormal><B><SPAN lang=EN-US>From:</SPAN></B><SPAN lang=EN-US>
Synth-diy <A class=moz-txt-link-rfc2396E
href="mailto:synth-diy-bounces@synth-diy.org"><synth-diy-bounces@synth-diy.org></A>
<B>On Behalf Of </B>Timothy Burns<BR><B>Sent:</B> 30 October 2020
15:17<BR><B>Cc:</B> SYNTH DIY <A class=moz-txt-link-rfc2396E
href="mailto:synth-diy@synth-diy.org"><synth-diy@synth-diy.org></A><BR><B>Subject:</B>
Re: [sdiy] favorite Youtube genre - "old guys repairing
electronics"<O:P></O:P></SPAN></P></DIV>
<P class=MsoNormal><O:P></O:P></P>
<DIV>
<DIV>
<P class=MsoNormal><IMG style="WIDTH: 2.333in; HEIGHT: 2.062in"
id=Picture_x0020_1 src="cid:905444917@31102020-0CA1" width=224
height=198><O:P></O:P></P></DIV>
<P class=MsoNormal>Good lord, I wish I watched this yesterday. Also what the
heck, did he <I>plan</I> before he started soldering in components? What fun
is that?<O:P></O:P></P>
<DIV>
<P class=MsoNormal>Thanks for the suggestions of video and audio channels,
this will be great to have on hand as I re-solder everything from the last 36
hours. <O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>I'm not saying I'm going to start now, but does anyone have
suggestions software or shortcuts for planning perfboard builds? Fritzling?
(Asking for a friend.) <O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>Thanks All!<O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>Tim<O:P></O:P></P></DIV></DIV>
<P class=MsoNormal><O:P></O:P></P>
<DIV>
<DIV>
<P class=MsoNormal>On Fri, Oct 30, 2020 at 10:34 AM Ryan B8S <<A
href="mailto:ryan@pimpdroid.com"
moz-do-not-send="true">ryan@pimpdroid.com</A>> wrote:<O:P></O:P></P></DIV>
<BLOCKQUOTE
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<DIV>
<P class=MsoNormal><O:P></O:P></P>
<DIV>
<P class=MsoNormal>Not an old guy, but I can't believe no one mentioned
Synth Chaser at Synth Chaser dot com.<O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><A href="https://www.youtube.com/c/SynthChaser/videos"
target=_blank
moz-do-not-send="true">https://www.youtube.com/c/SynthChaser/videos</A><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>My favorite youtube channel by an order of
magnitude.<O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV></DIV>
<P class=MsoNormal><O:P></O:P></P>
<DIV>
<DIV>
<P class=MsoNormal>On Wed, Oct 21, 2020 at 7:08 PM David Simpson <<A
href="mailto:davidosimpson@gmail.com" target=_blank
moz-do-not-send="true">davidosimpson@gmail.com</A>>
wrote:<O:P></O:P></P></DIV>
<BLOCKQUOTE
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<DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>I recently found this video and was astonished by the
skill, technique quietude ala Bob Villa.<O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><A href="https://youtu.be/_ypW45Y8VSs" target=_blank
moz-do-not-send="true">How to solder grid style PCB / 555 PWM DC-motor
driver (EEEL1-3)</A><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal>What are your favorite channels for
informative/instructive electronics repair? Preferable those who don't
yell or are in a constant state of outrage...<O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<P class=MsoNormal><BR clear=all><O:P></O:P></P>
<DIV>
<P class=MsoNormal><O:P></O:P></P></DIV>
<P class=MsoNormal>-- <O:P></O:P></P>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal>david o. simpson | cameraperson | <A
href="http://binarymob.com" target=_blank
moz-do-not-send="true">binarymob.com</A> |
earth<O:P></O:P></P></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV>
<P
class=MsoNormal>_______________________________________________<BR>Synth-diy
mailing list<BR><A href="mailto:Synth-diy@synth-diy.org" target=_blank
moz-do-not-send="true">Synth-diy@synth-diy.org</A><BR><A
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moz-do-not-send="true">http://synth-diy.org/mailman/listinfo/synth-diy</A><O:P></O:P></P></BLOCKQUOTE></DIV>
<P
class=MsoNormal>_______________________________________________<BR>Synth-diy
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