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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81 views

How should I solder one board to another?

I have a small power regulator/charger and a IOIO-OTG that I'm trying to solder onto my protoboard. My current idea is to use male/male headers. Is there another way? What is the best practice when ...
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2answers
39 views

What is the difference between a 2 and a 3 solder terminals socket (coaxial jack dc)

I'm not pro with electronics and electricity and I want to replace my notebook socket so I'm looking for a coaxial jack dc socket but, as I only have two cables (a positive and a negative one) to ...
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2answers
93 views

Can I solder back together a single broken copper winding wire in an electric washing machine motor? [closed]

Can I solder back together a single broken copper winding wire in an electric washing machine motor? This is the motor: ...
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2answers
75 views

Soldering problem when changing component on tablet board [closed]

I needed to change demaged Schottky SMD diode (2.2x1.2mm) at chineese tablet board. But I was not able to melt solder even I used hot gun at 400°C or soldering tip at 480°C. Finally I more or less ...
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1answer
98 views

How can I solder LCD Pins when solder does not “stick”?

I have a 16 * 2 LCD Display, with 16 input pins. However while I am soldering the pins it it does not stick or "take". How can I fix this? Is there any other metal for soldering a display ?
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645 views

Strange Solder Spots on PCB

I was tearing down some old CD drives and while taking a look to the PCB I found two pointy solder spots, connected to the first pin of each side of a chip which makes me think is an EEPROM. There ...
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1answer
94 views

Can this be reworked with a hot air gun?

I posted before about the Microchip RN4020 (Bluetooth Low Energy) PicTail failing. I have some spare RN4020 modules and access to a heat gun. If I can take this RN4020 off and put a new one on, how ...
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1answer
100 views

What is the type of solder used in a playstation 3 (PS3)? And its melting temperature?

I have a hot air station and I'm trying to replace the HDMI port on a PS3 (playstation 3). The problem I'm having is trying to melt the solder on the hdmi port. I'm curious to what kind of solder its ...
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0answers
43 views

Soldering oxidized parts

I have some old parts I would like to solder. The problem is that the matal pins/legs got oxidized over time and it is very hard (impossible) to get lead on them. I tried to use different fluxes but I ...
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0answers
13 views

How to properly solder apple's thunderbolt to vga [migrated]

I just bought a cheap Thunderbolt to VGA conversor, for a macbook pro. It didn't work at all so I decided to open the case. I found a silicon lump and most of the cables just hanging there. Just as ...
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6answers
2k views

What is the purpose of a PCB with no copper tracks, but only unconnected copper rings?

I have a PCB which has the perfect size for a project of mine, so I would like to use it if possible. However, the copper plating on the back side of PCB only surrounds the individual holes (that is, ...
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2answers
171 views

Consequences of mixing lead and lead-free alloys when soldering

Would it be a problem to use a lead solder paste to solder lead-free BGA package parts? Are there contamination/compatibility issues? Does it affect the physical connection integrity between the ...
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1answer
333 views

What is the “temperature code” of a soldering tip?

I am looking for a replacement tip similar to the ones below on the picture. On the bottom of my tip there is a number 6 which might be this "temperature code" that I found next to these types of tips ...
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3answers
552 views

Will solder usually connect copper vias on a 2-sided PCB?

I've seen videos where the board is suspended in a solution with an applied voltage to plate the vias, but I don't really have the resources to do that. Is soldering parts a reliable method to ensure ...
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2answers
65 views

Removing hot glue

When modding electronics it is usually recommended to apply copious amounts of hot glues when you solder a wire to a board contact pad to prevent accidental removal of said pad from the board.. I did ...
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2answers
103 views

How do I solder to these pads?

Quick question. I'm trying solder some wires onto the 5 pads (top right of board) in the image. What's the best way to achieve this? I cant get the solder to stick to the board and I have no flux. I ...
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1answer
146 views

Soldering BGA components DIY

If I understood correctly, current BGA components contain solder balls under the package. Do I still need additional solder paste to put on the board, or the amount of solder on the component contacts ...
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0answers
61 views

Do I need to fill in the vias under BGA pads?

I have a very dense BGA footprint. There is no way I can place the via between the pads - the PCB manufacture's tolerances do not let me. Also, the thinnest allowable traces do not fit between the ...
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0answers
60 views

How did soldering a different pin cause my IC to die?

I have an instrumentation amplifier and an op-amp on this PCB (home made), and everything was working fine. JP1/2/3 are all 2.54mm jumpers. Like so: Today I decided to solder two long wires onto ...
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1answer
165 views

How can I solder this circuit board without breaking it?

I bought a current sensor (link). I would like to connect it to my project, and I was planning to do so by just soldering on copper wires. There is a resistor on each side, with blobs of tin on ...
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1answer
55 views

Cleaning no clean flux paste

I am using no-clean flux paste for assembling the PCB board. Although it is 'no-clean', I need to clean it. Can anyone please suggest on cleaning the 'no-clean' flux? What do I need? And how to clean? ...
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2answers
53 views

How can I fix this Firewire 800 header by soldering? [closed]

Unfortunately I found the headers on my computer's belkin 3-port Firewire 800 all tilted back somehow, and they snapped off when I tilted them forward to where they should be. As a quick fix, I have a ...
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0answers
55 views

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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3answers
104 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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1answer
27 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
184 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
50 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
81 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
438 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
72 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
313 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
119 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
76 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
122 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
425 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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2answers
110 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
110 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
151 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
93 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
97 views

Cleaning solder SPONGE?

So how should I go about cleaning a soldering tip sponge?
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1answer
65 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
26 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
113 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
92 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
178 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
292 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
109 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
107 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
66 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 ...