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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I got a shock from the soldering iron [on hold]

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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49 views

My personal battle in repairing my Asus Zenbook's DC in [on hold]

I'm struggling here saving my laptop. Zenbook's charger gives problems to lots of people google says, and it was giving me problems too. I tried buying a new one, but it ended up not working well ...
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2answers
119 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
80 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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2answers
54 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
48 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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261 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
49 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
161 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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71 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
109 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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147 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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198 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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79 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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117 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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172 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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98 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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66 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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81 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
78 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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213 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 ...
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2answers
95 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
182 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
112 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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372 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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44 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 ...
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227 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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97 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?
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71 views

Headphone wires without insulation

I have some quality earbuds that have no sheath on the wires, because the copper unwinds all by itself, it's held in some thin nylon loose fibres that acts as the insulating material. it's seems very ...
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459 views

Choice of solder influencing quartz crystal?

I had problems with DS1307 based real time clocks, the culprit seems to be the solder we used. Let me explain. We were using an Adafruit DS1307 based RTC I2C ...
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120 views

Is there a way to join metal to plastic?

The plastic I would like to use is Polycarbonate, which will melt if you try to solder metal to it. If you can't weld the two, is there another way in which you can join metal to plastic? Ideally, I ...
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86 views

How does one reuse a thick film circuit?

I have a thick film circuit from a calculator that I want to use. How can I attach external connections to the sheet? I tried simply using the circuit as a contact in between a battery positive and an ...
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1answer
93 views

Best way to short these pins?

The pins that the arrows are pointing to are for the power button on my camera. If I take a small piece of wire and touch the two leads (they seem microscopic), then the camera turns on and off. I ...
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106 views

How do I solder a LED in place of an earphone?

I have a super basic bluetooth headset. I've taken off the earphone, and want to put a very low power, basic LED in its place. I plan on just soldering the anode to the red wire and the cathode to ...
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389 views

Using copper clad for RF projects

As a novice reading "Build Your Own Transistor Radios" by Ronald Quan I was kind of mystified by the author's statement that using "vector" board would be easier than using prototype boards, but the ...
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51 views

Visaton speaker, how to wire up [closed]

I just got some Visaton speakers in the mail. But I'm not sure how to solder on the + and - wire. There are four solder blobs (as seen in the picture below). To which ones do I solder?
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91 views

Why would solder paste not wick in completely during reflow?

I'm using a hot plate to reflow a PCB. Aside from a rather egregious amount of solder paste (this was the second time around, and somewhat intentional), why would solder paste, at temp, not wick in ...
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149 views

Played with some lead solder without washing my hands for awhile, should I be concerned?

I was using some lead solder at work, and wasn't aware it was lead solder nor had anyone told me that it can be dangerous. For the most part I was just handling it. This was last week and I don't ...
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1answer
77 views

DIY SMD - options for covering exposed vias?

I printed a PCB + got a kapton stencil made for a project I'm working on. One of the components is a BGA chip, and has vias close to the bga pads. The vias on the board don't have solder mask on them, ...
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655 views

Thick vs Thin Sponge for Soldering

After purchasing a TC205 sponge and comparing it with the default sponge that came with my soldering station, I noticed that the TC205 sponge is very thin in comparison! Is the thin sponge used for a ...
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185 views

Circuit working in breadboard but not perfboard

I am making a circuit to unlock my car doors. The central locking in my car works with 2 wires one at 12V, the other at 0V. When the 12V line is pulled low, the door locks. When the 0V line is pulled ...
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3answers
118 views

Easy Soldering to Aluminum?

I am building an antenna with aluminum elements. Is there any easy way to solder copper wire to the aluminum? I do not need a very strong connection, just a good electrical connection so I can then ...
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107 views

Loose connection when attaching an Arduino shield with header pins

I am adding this Spectrum Analyzer shield to my Mega: Using these header pins: The square pegs of the header pins are worringly loose inside the holes of the shield. I know soldering is an option, ...
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152 views

Lead Free Soldering and bad looking joints

For years I've been soldering with normal Sn60Pb40 solder wire. But now I try to switch to lead free solder. In many forums over the internet I found the Amasan BF32-3 solder wire. It's a Sn95Ag4Cu ...
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79 views

I've just bought a new Soldering Iron with the intent of making Art, however I seem to have a problem [closed]

I bought this: http://www.amazon.com/Weller-SP40NKUS-Medium-Soldering-Black/dp/B00B3SG7F0/ref=sr_1_2?ie=UTF8&qid=1394083021&sr=8-2&keywords=weller+soldering+iron The other day so that I ...
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2answers
151 views

Soldering guidelines for freezer applications?

I'd like to do a home project where I take temperatures inside of my freezer and inside liquids. Liquid-compatibility aside, I'm mostly curious about whether or not anyone can recommend some best ...
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1answer
80 views

Heating and Chilling ICs instantly from 200C to 0C? Does it damage the silicon inside?

I soldered VCXO oscillator and suddenly tried to cool it down with a cooler spray. Do you think that sudden cooling and heating damages the chip. The heating and cooling were well within the spec ...
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4answers
533 views

Advice Needed On Removing Stubborn Circuit

I'm new to soldering and I've done some research on what I need in terms of material and tools and what I need to do in terms of removing and replacing a circuit. The circuit I'm replacing is a Laptop ...
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498 views

Soldering underside pads of Teensy 3.1

I have to place this Teensy 3.1 on a PCB, I am planning to make the PCB such that it has headers on which the whole Teensy will fit. Essentially, it is similar to making a shield like we make for ...
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1answer
179 views

How to solder a connector when spacing of PCB pads is not equal to spacing of component pads?

After delivery of my PCB, I realized that the spacing of PCB pads is not equal to the connector pitch (the PCB footprint is bigger than the OLED connector)! (sad) Look: Any idea how to solve this ...