Author Topic: 0.8mm pitch hand soldered ?  (Read 6130 times)

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Offline Simon

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0.8mm pitch hand soldered ?
« on: July 14, 2013, 06:31:25 pm »
Is it worth considering hand soldering a 0.8mm pitch package ?
 

Offline Skimask

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Re: 0.8mm pitch hand soldered ?
« Reply #1 on: July 14, 2013, 06:40:41 pm »
Sure, easily done.  Even down to .4mm isn't too bad with a steady hand and the right tip on the iron...
I didn't take it apart.
I turned it on.

The only stupid question is, well, most of them...

Save a fuse...Blow an electrician.
 

Offline c4757p

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Re: 0.8mm pitch hand soldered ?
« Reply #2 on: July 14, 2013, 06:44:09 pm »
A flux-drenched walk in the park.
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Offline Skimask

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Re: 0.8mm pitch hand soldered ?
« Reply #3 on: July 14, 2013, 06:44:46 pm »
A flux-drenched walk in the park.
Roger that...
I didn't take it apart.
I turned it on.

The only stupid question is, well, most of them...

Save a fuse...Blow an electrician.
 

Offline Simon

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Re: 0.8mm pitch hand soldered ?
« Reply #4 on: July 14, 2013, 06:45:41 pm »
ok i'm convinced, I may just put the dip away
 

Offline c4757p

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Re: 0.8mm pitch hand soldered ?
« Reply #5 on: July 14, 2013, 06:47:43 pm »
DIP sucks. You could park a truck on top of the chip...
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Offline SeanB

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Re: 0.8mm pitch hand soldered ?
« Reply #6 on: July 14, 2013, 06:48:46 pm »
I have soldered SMD parts with a soldering gun ( OK, they were resistors, capacitors and diodes with the odd transistor but still the tip was a lot bigger than the part) so you should have no problems provided you use enough flux, a good light source and a good magnifier to see what you are doing.
 

Offline Kremmen

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Re: 0.8mm pitch hand soldered ?
« Reply #7 on: July 14, 2013, 07:51:13 pm »
Down to .65 mm it is quite easy. That said and depending on the exact method you choose, a high magnification loupe would be a good idea. Sooner or later you are going to accomplish a solder bridge and they may be somewhat hard to spot with the naked eye.

.8 mm is a walk in the park.
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Offline hlavac

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Re: 0.8mm pitch hand soldered ?
« Reply #8 on: July 14, 2013, 08:05:13 pm »
My hands are shaking as hell but I still prefer SMD over through hole :) I want the small stuff...
Just leave enough space around the pads to get there comfortably with soldering iron and solder wick without melting off the surrounding components should the things go south...

And don't be afraid of solder paste and reflow, its even easier than hand soldering.
Just get a suitable hot plate/ pancake maker.

When doing manual solder paste with proper consistency you can even try to do it in reverse - dip the component legs in solder paste then place it on the pcb :) Auto solder pasting pick and place machine, anyone? :)

Good enough is the enemy of the best.
 

Offline lewis

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Re: 0.8mm pitch hand soldered ?
« Reply #9 on: July 14, 2013, 09:56:12 pm »
No probs. Plenty of flux and tin the pads, you'll be fine. Some good tweezers help too...
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Offline poorchava

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Re: 0.8mm pitch hand soldered ?
« Reply #10 on: July 15, 2013, 11:56:53 am »
Sure, easily done.  Even down to .4mm isn't too bad with a steady hand and the right tip on the iron...

Respect... for me there's a huge gap between 0.5 and 0.4. 0.5 is rather trivial for me, but 0.4mm is a total bitch to solder.

0.8mm can be hand soldered even in volume production environment I guess.
I love the smell of FR4 in the morning!
 

Offline EEVblog

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Re: 0.8mm pitch hand soldered ?
« Reply #11 on: July 15, 2013, 12:15:26 pm »
0.8mm is large enough to do each pin by hand with fine (<0.5mm) rosin core solder if you prefer.
But of course you'd usually just drag solder.
I assume you have solder mask between pins?
 

Offline Simon

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Re: 0.8mm pitch hand soldered ?
« Reply #12 on: July 15, 2013, 12:25:40 pm »
On production yes, for prototypes probably not, I'll risk it when the time comes, at the moment it's functional prototyping versus finished product prototyping.
 

Offline Zbig

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Re: 0.8mm pitch hand soldered ?
« Reply #13 on: July 15, 2013, 07:59:35 pm »
Go for it Simon, you won't regret it. I went straight from "SMT by hand? You gotta be kidding!" to hand soldering TQFP144 0.5 mm. The feeling of suddenly no longer being restricted to DIP stuff was one of the greatest moments I had with this hobby. And I only have freeware Eagle license so table-sized PCB was out of the question for me ;) I use magnifying monocle (what is the proper English term for that?) - the kind of what old-school watchmakers used.
 

Offline c4757p

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Re: 0.8mm pitch hand soldered ?
« Reply #14 on: July 15, 2013, 08:02:40 pm »
Loupe, if I understand you correctly. I'll assume you're not using a real monocle.

(Damn. Add "loupe" to the list of perfectly valid English words that Google Chrome's spell check doesn't recognize. What are they, illiterate? :P)
No longer active here - try the IRC channel if you just can't be without me :)
 

Offline Zbig

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Re: 0.8mm pitch hand soldered ?
« Reply #15 on: July 15, 2013, 08:18:49 pm »
Heh, that was too easy :) We call this "lupa" as well yet somehow I was convinced you only call the hand-held type (like in search icon) that in English. Anyway, I found it works best for me even if you look a little weird wearing it (I got some funny looks at the fab when I was inspecting my first PCB). I wonder how would the USB microscope work out but I'm not sure about the eye-hand coordination while looking at the screen instead of the thing you're working on.
 

Offline IanB

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Re: 0.8mm pitch hand soldered ?
« Reply #16 on: July 15, 2013, 08:29:16 pm »
Most loupes appear to be of the hand-held kind. But there is a kind that you hold in your eye socket like a monocle, leaving both hands free. My father used one when he was engraving. I've tried Googling, but I am unsure how to describe that particular device compared to the regular hand-held kind.
I'm not an EE--what am I doing here?
 

Offline Zbig

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Re: 0.8mm pitch hand soldered ?
« Reply #17 on: July 15, 2013, 08:46:25 pm »
And this is exactly the thing I'm talking about, IanB. I find it perfect for SMD soldering. And I got it from my father, too.
 

Offline Simon

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Re: 0.8mm pitch hand soldered ?
« Reply #18 on: July 16, 2013, 05:21:21 am »
I just use reading glasses. refocusses my eyes closer so I can look closer at the board
 

Offline nukie

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Re: 0.8mm pitch hand soldered ?
« Reply #19 on: July 18, 2013, 12:17:52 am »
They are called eye loupes, used everyday by watchmakers. I drill holes on the side wall body of my loupe body for ventilation, it fog up after long hours of use.

Some people might find eye loupes hard to fit in their sockets, you can buy head band for it.

If you wear glasses, you can get clip on loupes.

If possible, get stereo magnifier, mono vision is less 3D hard to work with 2D? vision and it can cause lazy eyes syndrome.
 

Offline ptricks

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Re: 0.8mm pitch hand soldered ?
« Reply #20 on: July 18, 2013, 02:27:40 am »
I use a contraption I threw together with a usb camera and a 5" LCD.
usb camera is positioned close to work, found out you can adjust the lens on most of them to get very close, within 10mm of work easily.
LCD is held in place above the work area so when I look down I see the image as though it were like a window to the work surface.
Found that works best because it gets rid of the move hand up try to match the image issue that I had with the display in the normal vertical position.
 

Offline Psi

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Re: 0.8mm pitch hand soldered ?
« Reply #21 on: July 18, 2013, 02:48:13 am »
I just use an illuminated magnification lens, the kind that mounts to the desk and can be moved around.

My chin almost touches the lens (really close) i find that provides the most detail.
It probably doesn't 'look' cool but it works really well for me.

If your shortsighted it helps because you can focus on things closer than other people.
« Last Edit: July 18, 2013, 02:49:59 am by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline Zbig

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Re: 0.8mm pitch hand soldered ?
« Reply #22 on: July 20, 2013, 10:04:51 am »
They are called eye loupes, used everyday by watchmakers. I drill holes on the side wall body of my loupe body for ventilation, it fog up after long hours of use.
[..]

Right, that's exactly what's been done with mine on the photo as well.
 


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