[sdiy] SMD experiences

[David G Dixon]

I'm finding that opamp circuits generally require lower impedances (say, 10k
rather than 100k resistors) and more careful application of stability caps
in SMD

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of 
> Matthew Smith
> Sent: Thursday, September 08, 2011 6:15 PM
> To: Ian Smith
> Cc: Synth DIY
> Subject: Re: [sdiy] SMD experiences
> 
> Quoth Ian Smith at 09/09/11 10:30...
> > I was wondering about everyone's experiences with SMD work. 
> Smaller pcbs are less expensive after all...
> 
> I vastly prefer working with SMD to through-hole. Since I 
> discovered the delights of drag-soldering, I've been handling 
> 0.5mm lead pitch packages with relative ease - provided that 
> you've got soldermask. Wouldn't attempt the fine stuff with 
> homebrew boards with no soldermask.
> 
> I'm getting my boards done here:
> http://dorkbotpdx.org/wiki/pcb_order
> 
> ...so at $5 a square inch (and you get three copies,) small 
> PCBs really can be inexpensive.
> 
> About the only through-hole stuff I've put into board designs 
> recently are pin headers and other connectors, rotary 
> encoders, and "legacy" 
> parts like Nixie tubes and Soviet-era VFDs.
> 
> > Do SMD components consume less power/current?
> For the same device, no. It's just different packaging.  What 
> you WILL find is that your board design will have to 
> accommodate the requirements of parts that put out any amount 
> of heat - but that should all be in the datasheets. (Some 
> parts are designed to dissipate to the board, not an external 
> heatsink.)
> 
> -- 
> Matthew Smith
> 
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