[sdiy] favorite Youtube genre - "old guys repairing electronics"
sleepy_dog at gmx.de
sleepy_dog at gmx.de
Sun Nov 1 22:17:13 CET 2020
David Simpson wrote:
> I too often get hung up only knowing the "right" way to do something
but am increasingly learning there is largely no such thing.
Yeah, I'd say there is no one right way of doing it, but probably there
are some generally not-favorable ways.
Although it also depends on what "it" is, the requirements for the end
result.
Btw, the reason why I mentioned thicker silver wire GND wires over other
laquered copper wires as a kind of ripping-off protection for longer ones:
- I like to use thin wire (say 0.1mm) where thicker one is electrically
not required - the coat is burnt off much quicker for tinning the ends
(something like blink of an eye vs. 2..5 sec) than e.g. 0.3mm. (@ image
posted earlier is on the thicker side, was just floating around on the
bench I guess)
Am 01.11.2020 um 20:58 schrieb David Simpson:
> hi Steve.
>
> love the ingenuity!
>
> seeing this type of physical problem solving is super helpful to a
> newcomer like myself.
>
> I too often get hung up only knowing the "right" way to do something
> but am increasingly learning there is largely no such thing.
>
>
> On Sat, Oct 31, 2020, 2:05 PM <sleepy_dog at gmx.de
> <mailto:sleepy_dog at gmx.de>> wrote:
>
>
> Ok, I did find *something*, that's 7 years old, poor camera, poor
> photographer, and not made for demo'ing ;)
> It does alas not show what I described w.r.t. some longer copper
> wire connections being held in place in a less fragile manner by
> doing the GND wires last ,with silver wire across thinner copper
> wires.
> What is visible here are the legs of a 4x opamp DIP package (blue
> dotted line) stuck in from the top side of the perfboard, and a
> bunch of 0805 SMT components soldered underneath.
> This forms two sallen-key low pass filters IIRC, for some control
> signal conditioning, and additionally the IC has 2 decoupling
> capacitors.
> That would be 8 resistors, 10 caps.
> You can see, about half the passive components are under the
> opamp, making the whole thing take less board space than a only
> top-populated THT circuit, even if you curve the one resistor leg
> to make a standing resistor use 2 adjacent holes (making the
> populated board higher - sometimes not what you want).
> (this is less flat than it could be as I stacked capacitors in
> some places to get a more close value to what was needed vs. what
> I had at hand)
>
> https://i.postimg.cc/qvrMrtvM/SAM-0502-sml-annot.jpg
>
>
>> Am 31.10.2020 um 16:12 schrieb David Simpson:
>>> Hi Steve.
>>> Thanks for this excellent description of your process. lots of
>>> helpful tips.
>>> Would love to see some pictures if you have them handy.
>>
>> I don't have anything handy that would somehow showcase
>> especially the "tablet aided construction" as it were ;)
>> I reckon the end result doesn't really look much different than
>> anyone else's boards, other than I mentioned it specifically as
>> an aid to make circuits of somewhat higher density than usual
>> experimentel perfboard circuits.
>> I can imagine there are persons who find this too fiddly mucking
>> with the software and are practised enough to just do it all in
>> their head and by sight of the circuit flawlessly, but I'm not
>> such a one, so I thought I throw it in there, maybe someone finds
>> it useful.
>>
>> Forgot to mention about the green plated-through perfboards that
>> many chinese eber sellers have,
>> while the fact they have contacts from top to bottom can help,
>> you also need to take extra care of course, to not make
>> unintended connections, especially with the lazy use of
>> not-insulated wires to make long traces I mentioned - then
>> accidentally crossing one of the bottom side with one on the top.
>>
>>
>>>
>>>
>>>
>>> On Sat, Oct 31, 2020, 7:59 AM <sleepy_dog at gmx.de
>>> <mailto:sleepy_dog at gmx.de>> wrote:
>>>
>>>
>>> Heh. If I need something quickly, cant wait for PCB, but
>>> also it does have certain physical dimension requirements,
>>> 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?
>>> 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.
>>> 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,
>>> as things get more crowded and less intuitively placed, I
>>> found the following to be helpful:
>>>
>>> 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.
>>> 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.
>>>
>>> Also, in the type of scenario where I would, if I could,
>>> prefer a small PCB, but don't want to wait,
>>> I might already have a captured schematic in my chosen EDA
>>> software anyway - or if it's small, I'll just do it quickly.
>>> Then convert to PCB, and usually don't route anything, or at
>>> best a few special traces to mark special preferences.
>>>
>>> I put that on my small-ish tablet with stylus support, that
>>> actually fits on my crowded soldering bench.
>>> that also runs the EDA software. Then I:
>>>
>>> foreach non-GND-net:
>>> highlight net in PCB software
>>> connect all net points in circuit with insulated "coil
>>> wire", point-to-point
>>> 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
>>>
>>> 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 ;) ).
>>> Can basically do that half-asleep without making a mistake.
>>> (just make sure to display the bottom side mirrored
>>> appropriately :D)
>>>
>>> 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.
>>>
>>>
>>> - Steve
>>>
>>>
>>> Am 31.10.2020 um 11:23 schrieb ShedSynth:
>>>>
>>>> Hi all.
>>>>
>>>> I use perfboard, but I don’t try to make it into a PCB.
>>>>
>>>> I wire point-to-point with single core Kynar wire, normally
>>>> used for wire-wrapping.
>>>>
>>>> I use blue, black, red and yellow on the back for -12V,
>>>> GND, +5V and +12V.
>>>>
>>>> I use green for all signals, always on the component side.
>>>>
>>>> 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.
>>>>
>>>> Then I follow the schematic, which might take several days
>>>> – this isn’t a mass-production process.
>>>>
>>>> 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.
>>>>
>>>> Hope this might help somebody,
>>>>
>>>> Al
>>>>
>>>> If the picture comes through, it’s most of a Thomas Henry
>>>> MAXIMUS 3340 VCO.
>>>>
>>>> The front is just as ugly.
>>>>
>>>> *From:*Synth-diy <synth-diy-bounces at synth-diy.org>
>>>> <mailto:synth-diy-bounces at synth-diy.org> *On Behalf Of
>>>> *Timothy Burns
>>>> *Sent:* 30 October 2020 15:17
>>>> *Cc:* SYNTH DIY <synth-diy at synth-diy.org>
>>>> <mailto:synth-diy at synth-diy.org>
>>>> *Subject:* Re: [sdiy] favorite Youtube genre - "old guys
>>>> repairing electronics"
>>>>
>>>> Good lord, I wish I watched this yesterday. Also what the
>>>> heck, did he /plan/ before he started soldering in
>>>> components? What fun is that?
>>>>
>>>> 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.
>>>>
>>>> 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.)
>>>>
>>>> Thanks All!
>>>>
>>>> Tim
>>>>
>>>> On Fri, Oct 30, 2020 at 10:34 AM Ryan B8S
>>>> <ryan at pimpdroid.com <mailto:ryan at pimpdroid.com>> wrote:
>>>>
>>>> Not an old guy, but I can't believe no one mentioned
>>>> Synth Chaser at Synth Chaser dot com.
>>>>
>>>> https://www.youtube.com/c/SynthChaser/videos
>>>>
>>>> My favorite youtube channel by an order of magnitude.
>>>>
>>>> On Wed, Oct 21, 2020 at 7:08 PM David Simpson
>>>> <davidosimpson at gmail.com
>>>> <mailto:davidosimpson at gmail.com>> wrote:
>>>>
>>>> I recently found this video and was astonished by
>>>> the skill, technique quietude ala Bob Villa.
>>>>
>>>> How to solder grid style PCB / 555 PWM DC-motor
>>>> driver (EEEL1-3) <https://youtu.be/_ypW45Y8VSs>
>>>>
>>>> What are your favorite channels for
>>>> informative/instructive electronics repair?
>>>> Preferable those who don't yell or are in a
>>>> constant state of outrage...
>>>>
>>>>
>>>> --
>>>>
>>>> david o. simpson | cameraperson | binarymob.com
>>>> <http://binarymob.com> | earth
>>>>
>>>> _______________________________________________
>>>> Synth-diy mailing list
>>>> Synth-diy at synth-diy.org
>>>> <mailto:Synth-diy at synth-diy.org>
>>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>>>
>>>> _______________________________________________
>>>> Synth-diy mailing list
>>>> Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Synth-diy mailing list
>>>> Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>>
>>>
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
>>> http://synth-diy.org/mailman/listinfo/synth-diy
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20201101/b2c10244/attachment.htm>
More information about the Synth-diy
mailing list