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I can't stand seeing or using non-SMD parts. Am I sick?
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SiliconWizard:

--- Quote from: tom66 on February 24, 2020, 02:56:22 pm ---
--- Quote from: SiliconWizard on February 24, 2020, 02:29:30 pm ---Back when I was still occasionally making my own PCBs, which were single-sided only (never bothered making double-sided PCBs, too much hassle), I used to mix SMDs and TH components to ease routing, as the SMD/TH mix would allow having parts on both sides with almost no need for straps - I'd call that 1 1/2 sided :-DD
--- End quote ---

This is still practiced quite a lot in the industry.  Look at power supplies, SMD one side, through hole the other side.  SMD and through hole parts act as bridges as necessary, with jumper wires minimised if possible.

--- End quote ---

True :)
PKTKS:

--- Quote from: SiliconWizard on February 24, 2020, 03:05:52 pm ---
--- Quote from: tom66 on February 24, 2020, 02:56:22 pm ---
--- Quote from: SiliconWizard on February 24, 2020, 02:29:30 pm ---Back when I was still occasionally making my own PCBs, which were single-sided only (never bothered making double-sided PCBs, too much hassle), I used to mix SMDs and TH components to ease routing, as the SMD/TH mix would allow having parts on both sides with almost no need for straps - I'd call that 1 1/2 sided :-DD
--- End quote ---

This is still practiced quite a lot in the industry.  Look at power supplies, SMD one side, through hole the other side.  SMD and through hole parts act as bridges as necessary, with jumper wires minimised if possible.

--- End quote ---

True :)

--- End quote ---

True again.

With the following needed comment:
- SMD  **CAN NOT** be bended or twisted - it fails miserably
- SMD  **CAN NOT** hold the stress of  huge/large/heavy connectors
- SMD  **CAN NOT** deform and vibrate (being PLANAR) as THT
- SMD  tends to accumulate more power density than THT

Reason why  PSUs are mostly THT and several connector
boards are *must be*  THT  (automotive and stress environs)

IMHO  While being fancy smaller cute cheaper
PLANAR mounting tends to crack (MLCC and friends)
and are not as good as THT in power dissipation
Thing of:  using the PCB as a HEAT SINK ?

Solutions are not that effective in SMD for high heat sinking problems

Where THT still is ahed?
= it deforms insanely more without cracking
= vibration is less an issue ( they are NOT COPLANAR - own resonance)
= THERMAL SOLUTIONS ARE FAR BETTER
= the boards can DEFORM/BEND and TWIST (including connectors)
= MUCH HIGH MECHANICAL STRESS.

Still a serious  issue where it fits.  - fancy stuff aside

Paul

schmitt trigger:
In addition to what other posters have mentioned, (thermal dissipation, connector ruggedness)  the time I like to use TH components is when I am building a retro project.

When I do, as an aesthetic reason, I also like to orient resistors to have the tolerance band all facing the same direction.

But even then, there will be components which are only available as SMT. In those instances, I place them hidden on the board's bottom.  ;)
PKTKS:

--- Quote from: schmitt trigger on February 24, 2020, 03:59:08 pm ---(..))
When I do, as an aesthetic reason, I also like to orient resistors to have the tolerance band all facing the same direction.
(..)

--- End quote ---

Another excellent reason..  SMD has become so tiny
soooooo tiny - they are mostly UNREADABLE

They have become a hazard solution when you need
to replace something without a single clue of specs.

That does not happen in THT - they are marked
and responsible codes can be taken seriously.

SMD in the present form represents a safe issue
for replacing non marked - even obscure tiny things
you can not even identify ...

Another very *VERY* don't underestimate that.. safety reason
where it fits

Paul
Miti:

--- Quote from: KaneTW on September 25, 2019, 03:10:23 am ---The only time I use TH parts is for when I need the mechanical stability. Everything else is SMD.

--- End quote ---

^^^ This and power devices unavailable in SMT but I do some proto with THs.
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