What are people happy soldering ?

for bbc micro/electron hardware, peripherals & programming issues (NOT emulators!)

Can you select the hardest you can mange ?

I can't solder so I would get someone else to do it.
3
6%
Board uses conventional through hole parts and a ribbon cable
17
35%
Board uses smaller 1/8 watt resistors (so you might not have them in stock)
6
12%
Board uses 1206 SMT resistors and SOT23 devices
2
4%
Board uses SMT ICs (1.27mm)
6
12%
Board uses SMT ICs ( 1mm)
1
2%
Board uses SMT ICs ( 0.65mm)
14
29%
 
Total votes: 49

dp11
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Re: What are people happy soldering ?

Post by dp11 » Tue Sep 25, 2018 1:31 pm

Thanks to everyone who voted, I was surprised to see how many people are actually happy solder SMT, it is skill with a little practice you can become quite good at it.

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flynnjs
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Re: What are people happy soldering ?

Post by flynnjs » Tue Sep 25, 2018 9:03 pm

Where's the 0.4mm and 0,5mm options :mrgreen:

cmorley
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Re: What are people happy soldering ?

Post by cmorley » Tue Sep 25, 2018 9:11 pm

Or the 0201 option? :P

dp11
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Re: What are people happy soldering ?

Post by dp11 » Tue Sep 25, 2018 9:18 pm

While I do those by hand for work. My beeb projects are unlikely to need them. Should I add 0.5mm pitch BGAs and 01005 :D

Prime
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Re: What are people happy soldering ?

Post by Prime » Tue Sep 25, 2018 9:29 pm

flynnjs wrote:
Tue Sep 25, 2018 9:03 pm
Where's the 0.4mm and 0,5mm options :mrgreen:
Not done 0.4mm but have done a fair few of the 0.5mm TQFP 100 pin Xilinx devices, evend done them on home etched boards :)

There's another thing to be considdred, whilst I can pretty easily do a device such as that, plenty of flux etc, the device itself is actually quite easy to manipulate whilst aligning / tacking / checking / soldering, as it's actually quite big (2cm / 20mm along each side of the package), what I do find an absolute pain in the butt is surface mount resistors & capacitors, transistors and voltage regulators less so as they are normally slightly bigger and have another leg you can hold them by with the tweezers whilst soldering. One of the reasons I still tend to use PTH resistors and caps, the other reason being with self etched plated through boards you can often use them as a 'free' via.....

Cheers.

Phill.

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Elminster
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Re: What are people happy soldering ?

Post by Elminster » Tue Sep 25, 2018 10:26 pm

I would not go smaller unless you have to, I think apart from people with microscopes, the enjoyment gets less as the parts get smaller, but time taken increases. Not only that but less people would be inclined to get them unless one of the usual suspects decides to do a small run of them. RC2014 projects are as popular as they are as they almost never use SMD, the compact flash card being the exception.

If someone buys me a snazzy microscope I will give 0.4 a go!
Did you give a clue on the project yet?

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guddler
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Re: What are people happy soldering ?

Post by guddler » Wed Sep 26, 2018 1:12 am

SMT itself is OK. Actually I quite like it, it's quite neat. But clearly there's various levels of SMT. Have I soldered very fine pitch components with dozens (hundreds?) of leads, yes? Did I enjoy it? Hell no.

TBH, of more concern than can you SOLDER SMT, I would say is, can you remove it again should you need to? And obviously have it be in a condition that can be reused? Through-hole is very easy in this regard and also pretty forgiving as long as you don't make such a hash of it that you start to rip out via's. But for removing QFP FPGAs I had to go and buy some really quite expensive stuff - quick chip was it, maybe? Basically solder that melts at a very low temperature. Works really well and was easy to use but was really expensive and you wouldn't want to have to do it very often! I had no choice, I'd damaged an FPGA on an expensive PCB so I had to get it off and replace it or throw around £300's worth of PCB in the bin.

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Elminster
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Re: What are people happy soldering ?

Post by Elminster » Wed Sep 26, 2018 7:26 am

Chip quik.

Also a hot air gun is useful, definitely low melt fine solder and/or solder paste.

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Re: What are people happy soldering ?

Post by Prime » Wed Sep 26, 2018 8:31 am

Elminster wrote:
Wed Sep 26, 2018 7:26 am
Also a hot air gun is useful, definitely low melt fine solder and/or solder paste.
Will second that I've used the one on the Aoyue 2702 quite a few times for removing flatpacks, just a matter of heating all the pins in a round the edge pattern so allong one edge, then the next etc in a reasonably quick motion, whilst gently leavering up in one corner with a pair of fine tweezers.

Cheers.

Phill.

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Elminster
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Re: What are people happy soldering ?

Post by Elminster » Wed Sep 26, 2018 8:40 am

Prime wrote:
Wed Sep 26, 2018 8:31 am
Elminster wrote:
Wed Sep 26, 2018 7:26 am
Also a hot air gun is useful, definitely low melt fine solder and/or solder paste.
Will second that I've used the one on the Aoyue 2702 quite a few times for removing flatpacks, just a matter of heating all the pins in a round the edge pattern so allong one edge, then the next etc in a reasonably quick motion, whilst gently leavering up in one corner with a pair of fine tweezers.
I also use it to remove normal throughhole IC as well. Only gone as high as 10 pin IC on Beeb but can get them out in minutes, takes much longer with desolder gun.

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1024MAK
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Re: What are people happy soldering ?

Post by 1024MAK » Wed Sep 26, 2018 9:14 am

Elminster wrote:
Wed Sep 26, 2018 8:40 am
Prime wrote:
Wed Sep 26, 2018 8:31 am
Elminster wrote:
Wed Sep 26, 2018 7:26 am
Also a hot air gun is useful, definitely low melt fine solder and/or solder paste.
Will second that I've used the one on the Aoyue 2702 quite a few times for removing flatpacks, just a matter of heating all the pins in a round the edge pattern so allong one edge, then the next etc in a reasonably quick motion, whilst gently leavering up in one corner with a pair of fine tweezers.
I also use it to remove normal throughhole IC as well. Only gone as high as 10 pin IC on Beeb but can get them out in minutes, takes much longer with desolder gun.
It’s possible to remove 40 pin DIL chips using hot air as well. If you are careful and have a suitable nozzle, you can do it with an electric paint stripper as well :-)
Although if there are nearby SMD parts, you will need a heat shield.

Mark

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JudgeBeeb
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Re: What are people happy soldering ?

Post by JudgeBeeb » Sun Oct 21, 2018 4:36 pm

Elminster wrote:
Sat Sep 22, 2018 8:38 am
Perhaps we should save up for an ABUG flow oven.
I have finally invested in a reflow oven. It's the (infamous) T962A which is very well known and sold by a variety of Chinese vendors on eBay and AliExpress. It has a number of significant problems and is not recommended in it's unmodified form. There are details online of a variety of DIY hacks and mods including a much better firmware.

However, I bought this kit. That was not without its own set of problems. Notably, the controller board was faulty because, ironically, the solder hadn't been reflown properly. So I had to reflow it myself using a hot air gun. I did get it working nonetheless and ESTechnical immediately agreed to send me a replacement board as soon as they have the parts in.

These are from my first test of the ovenn.
2016_0124_071720_003.JPG
2016_0124_071628_002.JPG
2016_0124_071616_001.JPG
I am rather pleased with the results.
There is so much wonder in the universe; why should you want to imagine that there is more?

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Re: What are people happy soldering ?

Post by Ramtop » Fri Nov 09, 2018 10:40 am

JudgeBeeb wrote:
Sun Oct 21, 2018 4:36 pm
I have finally invested in a reflow oven. It's the (infamous) T962A which is very well known and sold by a variety of Chinese vendors on eBay and AliExpress. It has a number of significant problems and is not recommended in it's unmodified form.
I would say that's a very sensible warning. A colleague of mine bought a 962A from Ebay and the first time he switched it on it filled the room with foul smelling fumes and smoke. :shock:

Before that I'd thought about buying one myself as I find high pin count fine-pitch SMD parts highly unpleasant to hand solder. I suppose they are less of a problem for people with a good microscope and steady hands, both of which I lack. I had to solder some 100-pin 0.5mm QFPs recently and didn't enjoy the experience at all.
Gary

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vanekp
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Re: What are people happy soldering ?

Post by vanekp » Mon Nov 12, 2018 4:16 pm

Recent projects:-
Digital Oscilloscope
20181012_202425.jpg
Gigatron TTL Computer
20181112_171120.jpg
Maximite Color computer
20181109_232131.jpg
Peter.

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