Soldering is the metallurgic process used to fix electronic components to a PCB. Soldering can be done by hand or automatic. PTH boards were usually wave soldered, SMT uses reflow technology.

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Feed Raspberry Pi camera module with external clock signal

I want to frame synchronize multiple Raspberry Pi camera modules - I guess I can do this by feeding all the modules with a single external clock signal. The thing is being discussed in this post. The ...
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42 views

How do I pick a flux cleaner that's safe for use without industrial ventilation?

I was looking at getting this flux cleaner: Fluxclene FLU200D but then I noticed that in the datasheet, it mentions an inhalation toxicity of 300 ppm. That sounds like it's easily exceeded by just ...
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22 views

Conductive welding primer on fabric

I saw the discussions about conductive fabric with the links to lessemf.com and others. I'd like to get anyone's thoughts about painting a schematic on cloth using welding conductive primer such as ...
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3answers
143 views

What is the best way to solder these wires to circuit board?

What is the best way to solder these stranded wires onto a vero board (strip board)? I am thinking maybe using some kind of connector instead of just soldering on. It will make things more flexible. ...
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1answer
46 views

Elongate the power supply p4 connector [closed]

I've got pico-psu, tiny little power supply for computers. Recently I've moved onto a new motherboard, connectors on this mobo are located further than before. So I had to elongate psu-p4 connector ...
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2answers
72 views

How do I tell what sort of solder I have?

My soldering iron came as part of a kit and I have really not used it very much at all in all the years I have had it. (Read zero meaningful uses). I cannot remember who gave it to me or why. The kit ...
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3answers
371 views

How does power affect soldering irons? Is 30 Watts enough?

Soldering Irons seem to come in different Wattages. I imagined that it was just an indicator of how fast they get hot but might there be other considerations? How do the different power ratings ...
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2answers
65 views

What sort of soldering iron tip do I need for very fine PCB work?

I have a very fine PCB (illustrated in an answer to Soldering with a delicate looking board) but I have discovered that the screwdriver like tip I have seems to be too clumsy to clear solder from so ...
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1answer
304 views

Am I risking a short circuit/gaping situation?

I am rather new to the DIY/hobbyist electrical engineering scene. I am working with an arduino, a 9V power supply, and a few 7805 voltage regulators. I bought some sort of run of the mill PCB board ...
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1answer
110 views

Is there any problem with soldering a charged battery?

I have a project in mind that amounts to little more than rebuilding a broken eGo-T (electronic cigarette). The battery when I took the busted eGo-T apart had quite a kick and I got a minor burn from ...
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2answers
69 views

How-To: Bridge 2 Pins Without Soldering

I need to bridge two pairs of pins together on an Xbox 360 AV adapter, and the most common method is to solder them together (to fix a rebooting issue). I don't mind doing this, but I'd like to create ...
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2answers
112 views

Soldering with a delicate looking board

Short story: I want to solder cable to a pretty delicate looking board. There is not a lot of room to get at things so I need to be careful not to just screw everything up plus the PCB looks fragile ...
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3answers
398 views

Can I prevent copper traces from delaminating due to soldering heat?

I'm making a PCB that has a 100pin QFP pacakge microcontroller. After gaining experience with the UV photoresist process and reliably making the small, 0.5mm traces, I have a new problem: the copper ...
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1answer
71 views

GPU reflow soldering profile

I've had my ENGTX480/2DI/1536MD5 GPU for 3 and half years now. Over the past 2 months it started causing trouble. At first, it started seldom displaying big zones with weird color, but simply ...
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2answers
108 views

What is this connector?

I'm working on soldering a 3.5 mm female jack to the Thinkgeek Personal Soundtrack Shirt Controller so I can output to any speaker I please, however I am wondering if this is an actual connector I can ...
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4answers
136 views

High precision soldering of through hole components

I have a through hole component with many leads spaced closely together, see picture: I'm looking to unsolder it from the PCB and then solder it back again. Unfortunately, the leads are spaced so ...
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4answers
4k views

Is it bad if I held solder with my mouth?

When soldering, I have on a few occasions, used my teeth to hold a strand of solder while my hands were busy. I do not do this frequently, but sometimes I forget that solder is made of lead and I ...
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2answers
86 views

Lead solder toxicity after cooling?

Now I am sure that most people have read discussions on the possible hazards of handling solder and how your supposed to wash your hands after handling it. My question is, after soldering something, ...
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4answers
95 views

Cleaning solder SPONGE?

So how should I go about cleaning a soldering tip sponge?
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1answer
57 views

Soldering CPUs/GPUs/FPGAs - temperature issue

I am thinking about making my own FPGA board and soldering using reflow. The tutorials I've read all say the process requires temperatures in excess of 220 °F. However, at least according to this ...
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0answers
21 views

Problems with hole.lbr Eagle

I am simply trying to make two holes in a Eagle schematic using holes.lbr to connect two wires to. It appears as though I cannot connect it to any part, I have tried using the net, wire and junction ...
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2answers
87 views

I messed up the tip on my soldering iron. Is there any saving it? [duplicate]

I accidentally left my soldering iron, an XYTronic 258, on all night last night, set to a pretty high temp setting. Today I found that the tip was all oxidized and pitted looking. I tried cleaning it, ...
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2answers
90 views

Soldering capacitor pins

When soldering capacitors, is the order on which you solder them important? I am about to solder a project but I don't know this information For example, I can solder each pin however I like, or one ...
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1answer
131 views

I got a shock from the soldering iron [closed]

I bought a soldering iron from market. I used it for about 15 minutes and it worked great, but after that, when I touched the soldering wire to the tip of the soldering iron, I got a threatening ...
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2answers
163 views

How to solder large gauge wire to terminal

Apologies if this is not an appropriate question or if there are answers elsewhere, I am looking for a definitive answer which I have been unable to find. I want to solder some heavy gauge, ...
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1answer
94 views

Solder sticks to PCB (not just the pads!)

I'm having a severe problem with solder adhering to the FR4 PCB material. I made my boards (myself, my first time) using positive developer and etchant on a pre-sensitized board. I washed the etchant ...
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3answers
90 views

Soldering iron temperatures

I am working on surface mount circuit boards and having trouble removing components (through hole) due to the power and ground planes sucking away all of the heat from the soldering iron. Do you have ...
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1answer
57 views

Is it possible to toner transfer and hand solder MSOP's?

The chip is 3mm by 3mm (10 lead) My printers max DPI is 1200dpi If etching isn't possible, are the MSOP breakout boards on eBay an option? The breakout boards dimension says 1.25mm between the ...
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307 views

Troubleshooting/debugging PCB

This may be an off topic question, but I'm sure many of you have the knowledge and experience to help out here. A quite complicated motherboard was flexed. The resulting symptoms include cross-talk ...
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2answers
65 views

Consequences of not following reflow profile

I found many questions about how to perform reflow soldering, but my main concern is What are the consequences of not following the recommended reflow profile. Would there be any risk going the ...
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4answers
229 views

Holding components without bending leads when soldering upside down?

I am gaining experience in soldering components onto PCBs. I'm working through some one sided through hole PCBs and one thing that I'm having trouble with is holding components once I flip the board. ...
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1answer
74 views

melting ic epoxy casing

I was attempting to remove solder with faulty solder braid (there was no flux in the section I was using (for some reason...)), and I kept the soldering Iron on it for far longer healthy. Now the ...
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1answer
119 views

what lead-free solder type is convenient to use on hand-soldering?

I have read some discussions about the lead-free solders on the forum, but could not see what solder type is easier to use on hand soldering (for lead-free ones)? As an example, I see only two RoHS ...
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2answers
190 views

What's the difference between the chisel tip and screwdriver tip for soldering irons?

I've decided to take up learning soldering and I've seen people recommend the chisel tip for the kind of work I want to do. I took a look online and found that screwdriver tips look very similar to ...
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1answer
223 views

SMD Removal Process

I'm practicing my SMD soldering skills and done my research on how to remove SMD devices from a PCB motherboard and brought a T8280 PREHEATING STATION and 852D SMD station. I understand you have to ...
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3answers
218 views

What's the correct way to solder wires on that (LiPo) battery's terminals?

I need to solder a wire on each of the terminals on the battery shown below. They are approx. 15mm large. Should I solder the wires, of use some sort of clamp? It looks like the terminals are made of ...
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137 views

Solder Fumes - Activated Charcoal vs Outside Venting

Like probably everyone else here I do a ton of soldering. When I setup my current workshop I built a fume extractor that actually goes in a window near my bench. Basically just a length of dryer duct ...
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3answers
181 views

How to troubleshoot soldering issue?

I have circuit working perfectly on a breadboard - motors are spinning as expected. But same circuit with same components is not working when I soldered it - motors barely can spin (you hear buzz ...
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3answers
102 views

How to use a desoldered capacitor?

I live in a rural locality so it is much harder to get new capacitors than finding used ones at home. I found many capacitors, 2 of them are big with capacitance of 220 and 1500 micro Farad. But the ...
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2answers
74 views

Soldering thin polyurethane covered wire

Is it possible to "solder through it" or does it have to be fully stripped? The material is 0.15mm copper wire.
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1answer
91 views

Problem with solder

I'm having problems when I try to solder anything to my PCB. The solder doesn't come off the iron. I can't put nice solder dots like all the people in the videos do. It is really hard for me to put it ...
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1answer
81 views

What is the value of x-ray inspection of an assembled PCB?

I've heard discussion of x-ray inspection of assembled PCBs. I understand this to be useful for things like BGAs, where there's no other way to inspect all the solder joints under the package. Is it ...
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1answer
228 views

Metcal: why do they heat with HF?

I got a used Metcal station from ebay for my home-lab and everything I read about soldering with it is right, it is a completely different feeling. I understood that stuff about controling the ...
3
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2answers
107 views

Header plastic melts while desoldering

While I was trying to desolder a 6-pin header, the plastic holding the headers together melted. Now, that is fine, because I can pull out the individual pins that way, my question is, will the plastic ...
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2answers
1k views

Are AA battery and 18650 battery the same? [closed]

I have an Antex SZ004W0 wireless soldering Iron which uses three 1.5V, AA batteries, but I don't know if it supports rechargeable batteries. I know that it supports non-rechargeable battery named ...
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2answers
126 views

What is a good lab surface to hot-air rework on?

I have been scouring the internet for information regarding what would be a good surface to do hot air rework on. Right now, my lab, if you want to call it that, is a wooden bench with cardboard ...
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1answer
422 views

How does soldering affect the internal bonding between the IC die and its package?

In other words, How does the IC fabricator solder these thin wires between the die and the pads and guarantee that the soldering iron temp (300C for example) on the IC pads won't desolder them?
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48 views

Pb-free reflow soldering of thick packages on PCB

We have a PCB board with approx. 600 SMT components (various IC, passive components, etc.). This board is to be assembled by our manufacturing house and they do use a reflow oven to solder our ...
8
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1answer
300 views

How to neatly solder the following TRRS connector?

I would like to solder the following TRRS connector, which seems to be more difficult than the usual TRS connectors: I already know the order of the connections (TRRS = left, right, gnd, mic), what ...
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1answer
104 views

How to strip wire using Wire Wrapping Tool from OK Industries

For learning wire wrapping, I have a wire wrapping/unwrapping tool from OK Industries (HW-UW-3C) and some 30 AWG wire wrapping wire. Is it possible to use this tool to strip the wire?