[Noisebridge-discuss] A simpler circuit for ... [driving multiple LEDs with minimal batteries]

Taylor Alexander tlalexander at gmail.com
Wed Jan 19 13:26:15 PST 2011


"I don't understand the affair of soldering with hot air...
I transfer heat with more focus and speed using conduction than using
convection."

When you're assembling a whole board with most or all SMT components,
hot air is amazing. You can hand apply paste to each pad, put down all
the components at once, and then heat the entire board once, and
reflow everything without much effort. With a soldering iron, you have
to hold the part to make sure you don't move it, while holding the
solder and the iron - that takes 3 hands! And every pin on every chip
needs attention. With paste, you can be really lazy and it works
really well. And you're only ever doing one thing at a time - placing
paste, placing a component, or using hot air - so its really, really
easy. Also, hot air can solder chips that are nearly impossible to
solder with an iron - like a QFN chip.

Maybe someone could put on a hot air soldering class? I never have
time, but could try if no one else does.

-Taylor

On Wed, Jan 19, 2011 at 1:09 PM, miloh <froggytoad at gmail.com> wrote:
> On Wed, Jan 19, 2011 at 12:02 PM, Taylor Alexander
> <tlalexander at gmail.com> wrote:
>> Yeah. Well if you come up with that, let me know. ;)
>>
>> I can see 9 parts being a pain if you're wiring it by hand, but on a
>> PCB, its nothing. So if I stop being lazy, maybe I'll lay something
>> out. Or maybe something better will come up!
>>
>> Does noisebridge have a hot air gun for soldering? That would go a
>> long way towards people being less afraid of this kind of stuff.
>>
>
> somewhat outdated list of our equipment includes the Aoyue rework
> station ("Great for 'fixing' Xbox"):
> https://www.noisebridge.net/wiki/Resources/Electronics_Lab
>
> I don't understand the affair of soldering with hot air...
> I transfer heat with more focus and speed using conduction than using
> convection.
>


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