[sdiy] [OT] LM13700 spotted in commercial product of big Manufacturer

[Roman Sowa]

OK, challenge accepted!

Partly because it's fun, partly because thought I can beat it and partly 
because David is nice guy, I took the challenge and tried to beat 
David's markup doing it in SMD, obviously without P&P.
So for me it was 72 resistors of the same value, 0603 case. Preparing 
board and parts, placing them and soldering took 15 and half minutes.
So I've lost.

But it was a valuable experience which I never did before - to measure 
the time needed for this. Placing components took 5 minutes, which was 
my biggest surprise, soldering one side 7.5 minutes and the other side 
plus final inspection - 3 minutes.
Like David, I solder SMD for pleasure, so when the time flies like crazy 
I don't even notice it.

Roman


W dniu 2022-05-16 o 18:17, David G Dixon via Synth-diy pisze:
> You're missing my essential point:  I build electronics by hand for
> pleasure.  I derive no pleasure from handling tiny parts that I can barely
> see and that have to be installed on the solder side of the PCB.  I have
> installed SMD parts on boards by hand, and it is almost impossible for me.
> On the other hand, I have systems for making through-hole PCBs and
> installing through-hole parts that make it a snap to do.  I'm actually a bit
> of a through-hole ninja.  For example, in one of my common builds, I require
> 60 10k resistors on two PCBs.  I can prepare and stuff those resistors in
> less than 10 minutes, while watching TV at the same time.  I defy anyone to
> do that with SMD resistors without a pick-and-place machine.
> 
>   
> 
> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Mike
> Bryant
> Sent: Monday, May 16, 2022 3:20 AM
> To: Gordonjcp; synth-diy at synth-diy.org
> Subject: Re: [sdiy] [OT] LM13700 spotted in commercial product of big
> Manufacturer
> 
> [CAUTION: Non-UBC Email]
> 
>> Conversely, I pretty much gave up on constructing electronics until I got
> into doing SMD, because through-hole is such a fiddly pain in the arse to
> deal with.  SMD is so much easier.
>> Gordon
> 
> 
> Same here.   MUCH easier to get an assembly house to make it up for me :-)
> 
> And at the prices JLCPCB charge for assembly it's now often cheaper to do a
> re-spin than spend hours performing major surgery to a first prototype.
> 
> 
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