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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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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19 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
86 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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73 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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62 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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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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97 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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49 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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58 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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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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63 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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254 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
126 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
95 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
70 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
102 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
70 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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64 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 ...
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132 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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65 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
66 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
107 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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121 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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54 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 ...
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11answers
2k views

How to solder with one hand?

I am a beginner at electronics. I don't have many tools and stuff, so I am forced to solder by hand. I don't have a pcb to solder on, so I usually just solder the wires together, but it's really ...
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764 views

Does “Connected” mean solder together?

Looking here, I am shown that the connecting symbol, means the wires are, literally "connected" as shown below. I am currently working on trying to decipher an FM Radio schematic, but am having ...
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2answers
218 views

What's the easiest way to solder TSSOP parts?

I'm limited by DIP so I want to branch out but my hand is shaky as it is with DIP so I can't even imagine trying to solder TSSOP. Are there easy methods for this? Do I need better equipment? I heard ...
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2answers
94 views

Is soldering extra wires to increase current capacity on a pcb trace good design?

I was working on a bunch of PC PSU organ donors and noticed that on lots of them through all the wires that lead the power to the outside there were wires soldered, and lots of solder added. This is ...
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67 views

What is the proper way to preserve solder iron tips? [duplicate]

My question is should you turn off a solder iron to preserve tip when not in use. I am currently working on a project which requires sometimes a lot of soldering and sometimes occasional soldering to ...
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3answers
119 views

Best soldering iron for electronics projects [closed]

I was working with someone today trying to build a radio receiver and transceiver. First we went to build the coil needed and as it turns out the soldering iron we had bit the dust. So we went to use ...
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4answers
2k views

Is it worth reusing old components

I find myself constantly trying to recycle old components in my new projects. Yesterday, I needed a demultiplexer so I just took it out from some old phone board... Demultiplexers cost basically ...
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4answers
170 views

How do I solder this tiny QFN chip

I am not very experienced with soldering. I have a basic soldering iron with a new tip, and a third hand. Last time I tried soldering wires to a ble chip that looked like this, I ruined two chips in ...
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50 views

What's the best way to secure an input-port onto a PCB by hand? [closed]

I have an expensive Rosewill keyboard that has a serious design flaw: the usb input-port is secured solely by two thin metal wires soldered onto the PCB. Despite handling it very carefully, the ...
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63 views

Soldering below an adapter

As partly derived from the following question: How to solder under already soldered parts?: I have the same problem as described in the other question (unsoldered wiring through the pcb, now no ...
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2answers
428 views

Can I dip a soldering iron in water to cool it down?

I have a cheapo soldering station (Duratool D02265). It is fine for what I need. But, I often want to swap the tips round quickly, without waiting for ages for it to cool down! I was wondering: Can ...
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88 views

How to solder under already soldered parts?

I soldered several pin rows on my pcb, and thought that both sides of the pcb are already connected. Therefore I only soldered the pin rows on the bottom of the pcb. Unfortunately they weren't ...
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2answers
160 views

What is the name of the connector which hakko soldering irons have

I would like to build a soldering station for a Hakko 907 soldering iron, but i don't know the name of the connector what I'm going to need. Here is a link for the soldering iron that I have ...
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2answers
86 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
72 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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219 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
82 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
124 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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679 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
150 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
135 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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49 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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6answers
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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
255 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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349 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
770 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 ...