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<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial>Hi David,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial>I've spent the last few hours working on a layout on a 6" x 8"
PCB, which is nearly completely stuffed. In this case, it is a complete
Frequency Shifter circuit with a dual-core TZFM Quadrature VCO, a 12-stage
90-degree Phase Displacement Network, a dual 4-Quadrant Multiplier and summing
and differencing output amps. This was originally four separate
2.1" x 5.5" PCBs that I decided to put all together on a single PCB
for a customer in Iceland. The challenge is making all the
interconnections between the circuit blocks.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial>Maybe I'll try to make a brief video where I lay out something
simple. One problem with this method is that it is very easy to do in
Excel 2003, but pretty hard to do in later Excel programs. Microsoft
really got the Office 2003 suite right, but it has been going downhill
ever since.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial>Incidentally, the main reason I came up with this thing in the
first place was to lay out breadboards. I really hate breadboarding, and
the thing I hate the most about it is how messy it all turns out when not
planned properly. With my breadboard layout tool in Excel, I can lay out
breadboards on the computer and get them looking pretty and organized, and then
actually stuffing them at the bench is quick and easy, and almost guaranteed to
work the first time. I cut the leads on resistors and things so that they
sit tight to the breadboard -- this really helps make the circuit more
reliable.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial>Here's a picture of a breadboard for a pretty
basic 2164-based VCO -- note the colour-coded jumpers, which are actually
little wires with those colours of insulation that come in a little plastic
jewel box (this is very old, but I haven't used a breadboard in years
because making a PCB is still easier) -- the breadboard image was scanned
and imported into Excel:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=044540608-03112020><IMG border=0 hspace=0
alt="" align=baseline src="cid:044540608@03112020-070F"></SPAN></DIV><BR>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> David Simpson
[mailto:davidosimpson@gmail.com] <BR><B>Sent:</B> Monday, November 02, 2020 7:34
PM<BR><B>To:</B> David G Dixon<BR><B>Cc:</B> synth-diy mailing
list<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 dir=auto>
<DIV>David,
<DIV dir=auto>I'd still love to see a screencast/recording of this Excel process
in action, if you are ever so inclined.
<DIV dir=auto><BR></DIV>
<DIV dir=auto>One never knows when they'll be stuck in an underground bunker
with deprecated hardware and an emergency synth needs building...<BR>
<DIV dir=auto><BR></DIV>
<DIV dir=auto>FYI <A href="http://emergencysynth.com">emergencysynth.com</A> is
still available...</DIV>
<DIV dir=auto><BR></DIV>
<DIV dir=auto><BR>
<DIV dir=auto><BR></DIV></DIV></DIV></DIV><BR><BR>
<DIV class=gmail_quote>
<DIV dir=ltr class=gmail_attr>On Mon, Nov 2, 2020, 6:43 PM David G Dixon <<A
href="mailto:dixon@mail.ubc.ca" rel=noreferrer
target=_blank>dixon@mail.ubc.ca</A>> wrote:<BR></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote><U></U>
<DIV dir=auto>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Hi
Jeremie,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>I use an
HP Laser Jet MFP 130fw. It was about $100, and it doesn't run too
hot. It's not as nice as the old beige cubes (2100M) but my last beige
cube bit the dust a year or so ago.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>To address
Gordon's comment, yes, for general PCB work you'd be far better off learning
KiCAD or something else "real" but the Excel thing works for
me.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial>Cheers,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial>Dave</FONT></SPAN></DIV><BR>
<DIV dir=ltr lang=en-us align=left>
<HR>
<FONT size=2 face=Tahoma><B>From:</B> Jérémie Salles [mailto:<A
href="mailto:jeremie.salles@hotmail.com" rel="noreferrer noreferrer"
target=_blank>jeremie.salles@hotmail.com</A>] <BR><B>Sent:</B> Monday,
November 02, 2020 5:30 AM<BR><B>To:</B> David G Dixon<BR><B>Cc:</B> <A
href="mailto:synth-diy@synth-diy.org" rel="noreferrer noreferrer"
target=_blank>synth-diy@synth-diy.org</A><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 dir=ltr>Hi David,
<DIV><BR></DIV>
<DIV>That’s really a great process. Thanks for sharing. </DIV>
<DIV><BR></DIV>
<DIV>Which laser printer model are you using? I have a brother laser printer
HL1112 but I heart that transfer won’t work due to toner issue? Do you have
any experience using a brother laser printer for transfer? What would you
recommend?</DIV>
<DIV><BR></DIV>
<DIV>Jeremie. <BR><BR>
<DIV dir=ltr>Sent from my iPhone
<DIV><BR></DIV>
<DIV><SPAN>Private & Confidential<BR>The information contained in this
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<DIV dir=ltr><BR>
<BLOCKQUOTE type="cite">On 1 Nov 2020, at 18:09, David G Dixon <<A
href="mailto:dixon@mail.ubc.ca" rel="noreferrer noreferrer"
target=_blank>dixon@mail.ubc.ca</A>> wrote:<BR><BR></BLOCKQUOTE></DIV>
<BLOCKQUOTE type="cite">
<DIV dir=ltr>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Part
Two...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Next, I
turn all the traces black and superimpose the Pads on them to make
the Transfer pic. This is what gets printed onto PnP Blue transfer
paper:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><IMG border=0 hspace=0 alt="" align=baseline
src="cid:037363723@02112020-2AE8"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Finally,
I copy the Transfer pic, cover it with a translucent rectangle, and
superimpose the Parts pic on top of that. This makes up the Guide
pic, which is what I look at when stuffing the board:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><IMG border=0 hspace=0 alt="" align=baseline
src="cid:037363723@02112020-2AEF"></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>This is
what the board ultimately looks like. Using this Guide pic to stuff
boards is infinitely easier for me than stuffing silkscreened boards.
All the colour codes and cap values are there. I can also wire the
panel from this pic if it isn't too complicated. Stuffing and
soldering a board this size takes me about half an hour. The
longest part is actually making the jumpers, which I do with a piece of
broken protoboard while sitting in front of the TV.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>All of
this is done in Excel 2003 (in Windows XP). After the
actual Layout, making the subsequent pictures takes all of 10 or 15
minutes. When I'm done, I have a nice PCB layout that I can use again
and again.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Actually
making the boards is pretty easy. Print, transfer (using a T-shirt
press -- the best $300 I ever spent), etch (in an HCl/H2O2 solution), drill
(using a drill press -- the best $165 I ever spent -- I wore out my first
drill press after 10 years of PCB making), tin (with Liquid Tin solution
that I make myself), and it's ready to stuff. The entire process takes
about half an hour for a board this size. Hence, for something of this
complexity, I can sit down from scratch after dinner and have a working
prototype up and running well before bedtime that is nice enough to sell to
other people.</FONT></SPAN></DIV><BR>
<DIV dir=ltr lang=en-us align=left>
<HR>
<FONT size=2 face=Tahoma><B>From:</B> Synth-diy [mailto:<A
href="mailto:synth-diy-bounces@synth-diy.org" rel="noreferrer noreferrer"
target=_blank>synth-diy-bounces@synth-diy.org</A>] <B>On Behalf Of </B><A
href="mailto:sleepy_dog@gmx.de" rel="noreferrer noreferrer"
target=_blank>sleepy_dog@gmx.de</A><BR><B>Sent:</B> Saturday, October 31,
2020 4:57 AM<BR><B>To:</B> <A href="mailto:synth-diy@synth-diy.org"
rel="noreferrer noreferrer"
target=_blank>synth-diy@synth-diy.org</A><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><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 type="cite">
<DIV>
<P class=MsoNormal><SPAN>Hi all.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>I use perfboard, but I don’t try to make it into
a PCB.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>I wire point-to-point with single core Kynar
wire, normally used for wire-wrapping.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>I use blue, black, red and yellow on the back for
-12V, GND, +5V and +12V.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>I use green for all signals, always on the
component side.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>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.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>Then I follow the schematic, which might take
several days – this isn’t a mass-production
process.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>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.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>Hope this might help
somebody,<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>Al<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN><U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>If the picture comes through, it’s most of a
Thomas Henry MAXIMUS 3340 VCO.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN>The front is just as
ugly.<U></U><U></U></SPAN></P>
<P class=MsoNormal><IMG style="WIDTH: 3.281in; HEIGHT: 4.718in"
id=m_5698886048979022377m_521365157601970841Picture_x0020_3
src="cid:037363723@02112020-2AF6" width=315
height=453><SPAN><U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN><U></U><U></U></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 href="mailto:synth-diy-bounces@synth-diy.org"
rel="noreferrer noreferrer"
target=_blank><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 href="mailto:synth-diy@synth-diy.org"
rel="noreferrer noreferrer"
target=_blank><synth-diy@synth-diy.org></A><BR><B>Subject:</B> Re:
[sdiy] favorite Youtube genre - "old guys repairing
electronics"<U></U><U></U></SPAN></P></DIV>
<P class=MsoNormal><U></U><U></U></P>
<DIV>
<DIV>
<P class=MsoNormal><IMG style="WIDTH: 2.333in; HEIGHT: 2.062in"
id=m_5698886048979022377m_521365157601970841Picture_x0020_1
src="cid:037363723@02112020-2AFD" width=224
height=198><U></U><U></U></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?<U></U><U></U></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. <U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></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.) <U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal>Thanks All!<U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal>Tim<U></U><U></U></P></DIV></DIV>
<P class=MsoNormal><U></U><U></U></P>
<DIV>
<DIV>
<P class=MsoNormal>On Fri, Oct 30, 2020 at 10:34 AM Ryan B8S <<A
href="mailto:ryan@pimpdroid.com" rel="noreferrer noreferrer"
target=_blank>ryan@pimpdroid.com</A>> wrote:<U></U><U></U></P></DIV>
<BLOCKQUOTE
style="BORDER-BOTTOM: medium none; BORDER-LEFT: #cccccc 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 6pt; PADDING-RIGHT: 0cm; MARGIN-LEFT: 4.8pt; BORDER-TOP: medium none; MARGIN-RIGHT: 0cm; BORDER-RIGHT: medium none; PADDING-TOP: 0cm">
<DIV>
<P class=MsoNormal><U></U><U></U></P>
<DIV>
<P class=MsoNormal>Not an old guy, but I can't believe no one
mentioned Synth Chaser at Synth Chaser dot com.<U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><A
href="https://www.youtube.com/c/SynthChaser/videos"
rel="noreferrer noreferrer"
target=_blank>https://www.youtube.com/c/SynthChaser/videos</A><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal>My favorite youtube channel by an order of
magnitude.<U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV></DIV>
<P class=MsoNormal><U></U><U></U></P>
<DIV>
<DIV>
<P class=MsoNormal>On Wed, Oct 21, 2020 at 7:08 PM David Simpson <<A
href="mailto:davidosimpson@gmail.com" rel="noreferrer noreferrer"
target=_blank>davidosimpson@gmail.com</A>>
wrote:<U></U><U></U></P></DIV>
<BLOCKQUOTE
style="BORDER-BOTTOM: medium none; BORDER-LEFT: #cccccc 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 6pt; PADDING-RIGHT: 0cm; MARGIN-LEFT: 4.8pt; BORDER-TOP: medium none; MARGIN-RIGHT: 0cm; BORDER-RIGHT: medium none; PADDING-TOP: 0cm">
<DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal>I recently found this video and was astonished by
the skill, technique quietude ala Bob Villa.<U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><A href="https://youtu.be/_ypW45Y8VSs"
rel="noreferrer noreferrer" target=_blank>How to solder grid style PCB
/ 555 PWM DC-motor driver (EEEL1-3)</A><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></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...<U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<P class=MsoNormal><BR clear=all><U></U><U></U></P>
<DIV>
<P class=MsoNormal><U></U><U></U></P></DIV>
<P class=MsoNormal>-- <U></U><U></U></P>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal>david o. simpson | cameraperson | <A
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<P><BR></P><SPAN>_______________________________________________</SPAN><BR><SPAN>Synth-diy
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