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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recommended wattage for soldering station

I'm looking at buying a new soldering station and trying to figure out what would be the right wattage. I'm going to soldering everything from electronic components (not much SMD, if any) to 16mm2+ ...
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2answers
64 views

What makes lead-free solder harder to use? [duplicate]

Soldering in a RoHS-compliant way normally means using a solder that does not contain lead - the metal that made up most part of common solder before. Handsoldering using lead-free solder seems to be ...
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3k views

What makes solder harden?

Soldering wire is very soft and pliable, but solder on a circuit board is hard. Why? I haven't been able to find a definitive answer, but some ideas that come to mind are: Some kind of chemical ...
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1answer
45 views

Solder mask custom shape in altium

I want to have a region in my PCB without solder mask while the other regions should have solder mask. I am not sure how do I do it in Altium? To be precise I want say a custom shape solder mask free ...
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51 views

Solder mask free regions on PCB

I have noticed many PCBs with solder mask free regions/areas on the edges. I am attaching an image with this. What is the purpose of such areas ? What I can think of is heat transfer to the ambient ...
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1answer
39 views

What is the critical temperature when (batch) desoldering?

I have seen videos on youtube with some guys using hot air pistols (or even small propane burner with bunsen flame) to desolder the components from a PCB. The job is done REALLY quick! The components ...
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0answers
69 views

Cheap Gas or cheap electric soldering iron?

I have a worn down cheap soldering iron from Radio Shack. It is barely hot enough to solder and takes a while to heat up. I want to know if I should use a gas one next. Pros: Heats up instantly ...
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2answers
109 views

Is it possible to recover from this un-soldering mistake?

I did a real mistake when un-soldering this PCB : The metal part of the PCB was accidentally removed. Now it is impossible to solder anything at this place again: the solder material (what's the ...
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1answer
63 views

How to identify solder

Recently, my headphones mic stopped working and I figured it was probably the jack (although I'm not 100% sure). So what I've set out to do is to solder a new jack on. I asked my Dad and he said the ...
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48 views

Soldering USB cables : USB male to pin headers?

I find it quite difficult to work with USB cables by reusing premade ones : the wires in them are very thin, and it is quite hard to solder them properly, without breaking them. How do you solder ...
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2answers
1k views

White hairs inside a headphones cable

I have a cheap set of Phillips SHE3000 earphones with a broken wire on the plug. Since I was repairing another set of headphones, with the same problem, I bought an extra plug, just to try repairing ...
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1answer
65 views

Max current through solder tracks?

I've searched Google and couldn't find a simple answer to this question. I'm guessing the only limiting factor is the solder's melting temperature? I don't think I should have a problem with < 20A, ...
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1answer
77 views

Documented health effects when exposed to solder / flux smoke? [duplicate]

I run a repair shop and occasionally we do soldering work, but nothing too crazy. I was wondering what are the documented health effects when exposed to solder smoke. We do have an open space with low ...
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1answer
67 views

Can I use masking tape for 12V max insulation?

Hello. Would it work if I put masking tape over a solder joint as insulation which would carry 12V max? I'm connecting a general-purpose 3-12V AC adapter to some wires. Any help would be appreciated. ...
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4answers
1k views

Which are the safety recommendations for soldering?

I was reading about tin alloys for electronics soldering and found it it has about 40% of lead in composition. Lead, everyone knows, it's very dangerous to breathe it due to being a heavy metal. Also, ...
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2answers
83 views

Soldering multiple resistors in series

I'm starting the wiring for my project and would like to solder two resistors together in series. There is good chance that the wire will be exposed to heat and gentle turbulence. What is the best ...
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1answer
50 views

Split USB Port Into 2 Separate Ports

I've a device (An old NES cart, actually) that I've fitted with a USB port and a flash drive. I'm using it in a NES to Raspberry Pi conversion. My idea was to have a port on the side for connecting to ...
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4answers
59 views

Cutting off metal anchor legs on an HDMI port or Metal connector? What to use?

I'm looking for some advice on how to cut an HDMI port anchor leg off using some type of miniature cutting wheel. I bought a dentist micro drill, but I'm unsure which type of burs to purchase and type ...
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1answer
79 views

Coating a soldered connection on a small circuit board

I have a small PCB, about the size of a quarter and having a Bluetooth chip on it. I have 4 wires soldered to the board. 2 of which are for a 3.7 Volt battery connection and 2 are to connect a small ...
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1answer
70 views

What will happen if I solder two 120mm 12v computer fans to one 12v phone charger?

After enough YouTubing and self educating, I decided to take the plunge and purchase a soldering iron. It took me two attempts (apparently the cable of the charger that has the grey dashes on it is ...
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1answer
63 views

How do I solder a wire to a motor body?

I'm trying to solder a few capacitor grounds to a small motor body. I'm using 60/40 flux core solder and I cannot get the solder to stick to the body of the motor! Is there some secret way of doing ...
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1answer
72 views

Do soldering glasses protect eyes from capacitor explosion

I am concerned about safety while working with electrolytic capacitors. Can I use soldering safety glasses to protect my eyes while working with electrolytic capacitors?
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3answers
109 views

What soldering kit for tiny electronics? [duplicate]

This is a my first foray into building electronics. I am building a project that uses chip/SMD LEDs and resistors. What type of soldering kit should I be using for those devices?
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1answer
730 views

What are the dents for?

I bought a few bc417 serial bluetooth modules which have pins that look like this: Is there a standard name for this kind of pin? I believe I can treat them like any other SMD pin, but I'm curious ...
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2answers
67 views

Solderless headers?

Where can I find solderless headers suitable for a solderless breadboard.? This is for a raspberry pi project I'm working on which requires the mounting of an LCD screen. I have explored the ...
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What is the temperature vs time relationship for derating soldering iron dwell time?

Another question here involves someone using a 100 W iron to solder electronic components. This is much hotter than required, in my experience. The soldering specs for ICs are typically ...
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3answers
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100W Soldering Iron Risks And Arduino

So I bought a 20W soldering iron a while ago and I found the experience very frustrating as the tip does not get hot enough quickly and when it does melt the solder it gets cold so quick I cant get ...
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1answer
43 views

Modifying a Boss DS-1 Distortion pedal, possible lifted pads

My apologies if this is in the wrong place, seems like the people on this section would know what to do in this situation. I am brand new to circuit bending and electronics work in general, really ...
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3answers
98 views

Working with a tiny IC

I have recently purchased several Atmel's touch sensor IC's AT42QT1010 which are extremely tiny (1.6mm x 2.9mm) and I would like to be able to mount them on a breadboard. I have tried soldering them ...
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3answers
111 views

Soldering, Chips for Beginners

I am currently running a club for kids (9-11) for Arduino and we are making a robot and are moving on from motor/transistor drivers to half-hbridge (so we can go backwards). The kids are learning to ...
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3answers
94 views

Is it possible to solder this non-standard package (sim900) using hot-air station?

I don't have any experience with hot-air soldering. Would it be possible for a complete newbie to solder this kind of package using a hot-air station: I only need to solder pads closer to the edges ...
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4answers
2k views

Are solder bridges on chips always bad?

I just bought my Arduino Ethernet shield – a knock-off one for $10 instead of $60. I connected it up, but it doesn’t work – LEDs light up but do not blink, and no ethernet link is established ...
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106 views

Tips for soldering delicate smd ICs without smd equipment

Lets say I have a physically rather delicate part like a MAX6143AASA50 (a SOIC-8 package, the one I am going to solder, but the exact chip doesn't really matter) and want to solder it, but don't have ...
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59 views

Is it mandatory to use thermals in hand soldered PCBs?

I understand thermals are used to prevent tombstoning during oven soldering by allowing all pads to heat up more evenly, but are they necessary when the PCB is going to be soldered by hand? Consider ...
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2answers
64 views

How to apply temporary pins to PCB

I want to temporarily solder a pin on my pcb where I know for a fact that it's going to be moved soon. Is there a better way? Is there like a plastic piece I can attach to the other side of the ...
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6answers
2k views

How to hold SMD parts in place while soldering?

I go through this every time I have PCBs I need to populate with SMD parts, and this has become more an issue as pin spacings have gotten tighter, and my hands have become less steady with age. So ...
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1answer
69 views

Could cold Solder be the cause of burnt components?

I have a mainboard of a slot machine that has burnt resistors. I wonder if this could be related to cold solder, because the slot machine remains on for long periods of time (months at a time) and ...
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2answers
317 views

How much larger should a plated-through hole be than lead diameter to get good solder wetting?

I'm designing a new PCB where I have a whack of connectors that have to line up with the metalwork. These are a two-piece Neutrik XLR connector where the insert is soldered to the PCB and then mates ...
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3answers
155 views

Tips for desoldering difficult to desolder mini transformers

I have to replace a couple of small transformers without destroying the PCB or the transformers. Unfortunately my phone camera is unusable so I need to describe them and what makes the situation so ...
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2answers
99 views

Is there any problem soldering a device while it's powered on?

I'm frequently tempted to solder to devices that are still powered. Assuming that: it's a low-voltage device there's nothing static-sensitive on the board I'm not going to short anything out ...
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1answer
83 views

Temperatures for replacing BGA chip?

Newbie here who is going to try his hand at replacing a BGA chip on a laptop motherboard. I have ordered a new chip: NVIDIA G84-950-A2, and want to confirm some temperatures. Based on some ...
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3answers
120 views

Removing PCB from complex pattern of soldered-in thru-hole posts?

I have a PCB mounted to a chassis with 16 feedthrus, the feedthrus posts are soldered to plated thru-holes in the PCB. I would like to remove the PCB from the chassis, the problem is that I am unable ...
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2answers
81 views

Can I solder high power 1W LEDS on aluminum with 60/40 solder? [duplicate]

I want to create my own light source using high power 1W LEDs. Can I solder high power 1W LEDS on aluminum with 60/40 solder? Here's a picture of a potential heatsink
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1answer
68 views

Physically sharing 5v and ground between multiple sensors

I'm using the Adafruit Trinket with two sensors that both need to be connected to power/ground pins (Trinket has one 5v output power and one ground). The final size of a whole thing matters so I ...
3
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2answers
158 views

Why can't I solder to this micro USB adapter?

I cut the head off a micro USB power supply thinking I could improvise a full micro USB cable. I found only Vcc and gnd wires. So, I decided to tear into the connector itself. Inside the connector was ...
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0answers
69 views

RGB Cable Assignments - help

I have a video cable D-Sub 9 pin. Someone know the connector pin assignments to do a RGB 3 bnc cable? Someone can help me? Below, the image of description of the cable
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2answers
81 views

Can I use aluminum tape or naked two paralleled striped cables to connect parallel LED strips?

I need to parallel connected couple dozen cut LED strips. The total current reaching them won't exceed around 2 amps. My constraint: I can not order any more components for the job. My tools: ...
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1answer
138 views

Melted Electrical Tape Toxic?

I'm not very experienced with electrical soldering, but I decided to give it a go. I don't have any kind of clamp to hold the protoboard in place, so I used electrical tape to hold it down to the ...
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2answers
162 views

Best way to hand solder pads with castelations to wires

I have ordered a cheap XS3868 A2DP Bluetooth model, and don't know what is the best way to solder its joints to a thin wire such as AWG 30 or similar. For reference, here is a picture of the joints: ...
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55 views

Where to find ICs in package sizes good for soldering? [closed]

I'd like to know the best places to find ICs that you can solder with. A lot of the package sizes I come across are way too small to solder by hand. I prefer through hole and sockets (like pdip), but ...