Questions tagged [soldering]

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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3answers
94 views

Grounding for working with electrostatic-sensitive devices

I'm planning one of my first electronics projects beyond basic repair soldering (it's a small pre-amplifier for a contact microphone). So I've got some JFETs and other pieces and would like to put ...
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1answer
74 views

Mini reflow oven advice

Hey all I am venturing into making a DIY reflow oven. Been looking at many different types/styles over the last couple of years and feel now is a good time to start one. I originally planned on ...
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How to desolder Acer Chromebook CB3-532-C47C EMMC? [closed]

Does it require a re flow soldering oven? Does it require a soldering iron?
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Is 35g/in^2 a good "rule" to use for upside down reflow surface tension?

I have one assembler that gave me their "rule" of 35g/in^2 for reflow parts falling off upside down or successfully hanging on. Are there any sources that point to this being any more than ...
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2answers
892 views

How to solder a single wire into multiple cups in a D-SUB connector?

The question title says it all: I need one wire in the cable to connect to 3 cups in a D-SUB connector. How do I best do this? Do I solder the cups together with a blob of solder? Do I bridge the cups ...
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2answers
76 views

LPDDR: is pluggable (socketed, not soldered) connection possible for low voltage?

I've already asked the question about plausibility of socketed LPDDR here and got an answer LPDDR on separate replaceable modules / boards - possible? drawbacks? You could probably extend LPDDR onto ...
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2answers
146 views

What's the purpose of non-wettable soldering iron tips?

While looking for a very fine soldering iron tip, I came across this tip. It apparently has no wettable surface like every other tip I've used does, and I struggle to see why this might be a desirable ...
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78 views

Solder alloys resistances for high current PCB laptop connections

Some time ago I had a problem with my laptop DC connector which force me to replace the PCB connector by a new one. After doing it, I have noticed that the connection becomes very hot and even the ...
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31 views

How do some controllers detect and control devices with different pinouts?

There are controller circuits capable of identifying and powering a variety of devices regardless of different pin configurations. As an example, a few soldering stations, such as the Unisolder, work ...
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5answers
132 views

How many times can I solder/desolder a through-hole component on a PCB?

I am very new to soldering and desoldering and want to try doing it on a mouse's switches. I want to try out multiple different types of switches on the same mouse. I read that the temperature limit ...
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What mask for P-TFBGA241-1212-A5 pkg

I want to get myself into BGA soldering, probably this is not the best chip to start with, however I want to rescue some piece of electronics and I am not afraid to scrap it. Package name for my chip ...
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Soldering information missing from datasheet - what can I assume?

Background I tested some Bourns PEC11L encoders before soldering - they were working fine. Once soldered to my PCB at 300C using Sn99.3,Cu0.7 solder, they stopped working. Looking at the datasheet, I ...
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Crater-like features on thick leads soldering - is this a soldering defect and should I be worried?

I have bought a new motherboard and upon closer inspection of VRM chokes I found many of them have these crater-like features (defect?) on their on their leads. Is this some kind of a defect, should I ...
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66 views

Recommendations on the use of a hot air solder station with heating plate

I got myself a hot air soldering station with pre-heating plate. Because some may ask, it's a STAMOS S-LS-10. I could not find satisfiable recommendations with regards to rework procedures or initial ...
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130 views

What is this soldering mess and how to clean it? And to make this contact proper?

I tried to solder 1.5mm2 cable to a LED COB with Sn at 350°C but it seems that the LED COB has too much thermal momentum and remains too cold for such soldering (the Sn takes the form of a small ball, ...
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1answer
127 views

Are these PCB terminals not solderable?

I'm soldering my first shortwave radio kit. I've got to soldering the headers which will take the 2.5" touchscreen display. I know this may be obvious, but best to check, is the middle and right ...
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54 views

Problems turning USB-A mouse dongle to USB-C

today I was trying to turn my old USB-A mouse receiver to an USB-C mouse receiver. I was using an USB-C plug of an old broken USB-C to USB-A/Ethernet-Adapter (similar to the one in the picture), it ...
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1answer
79 views

How to prevent repeated re-soldering of SMD chip during testing?

Lets say you have a commercial device you are experimenting with. It has a flash memory chip that cannot be read while in-circuit (I have already tried the clip thing), so you have to de-solder it ...
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3answers
328 views

Is it ok to solder thermocouple wire ends?

I am using T type thermocouple wire. I am using it in a situation where I don't want the sensor to fail hence I thought it is a good idea to solder the ends together instead of only twisting them to ...
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1answer
63 views

Soldering to output pins on AC-DC linear power supply

I have a linear AC-DC power supply with output pins that require soldering Datasheet What is the proper way to do it, maybe an example of final result?
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6answers
930 views

First time soldering - why won't solder full surround my joint?

My first time soldering a PCB. The first ten joints went well and then suddenly the next two didn't. I can't get the solder to fully surround the wire on this joint. One side just won't wet despite ...
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1answer
64 views

How can I manage the temperature in a heat gun without heat control during desoldering a WSON8 chip?

Due to financial constraints I am thinking of buying a cheap heat gun for desoldering. Usually, cheap heat guns reach high temperatures without too much control. So how I can avoid burning the chips ...
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1answer
110 views

How I can desolder this WSON8 chip?

I have the following chip that I want to desolder: I tried with my 60W soldering iron and a pair of tweezers and desoldering braid, but it won't budge; also, my soldering iron won't heat to more than ...
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1answer
59 views

Problem for 3 mini water pumps controlled by transistors with Esp32 Wemos UNO

Hello everyone I'm doing my project controlling three water mini pump by one board with transistors BC337. The pin will give power when touch sensor sensed something which is embedded in the esp32. ...
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2answers
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What is this strange Weller soldering iron tip used for?

This is a Weller ET DS (4ETDS-1) soldering tip for the Weller WE 1010 soldering station. What's it for (because it looks daft to me)?
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elongated footprint pads for LGA, BGA, QFN packages

Sometimes I need to add more solder in between a capsule and its land patterns, other times I even need to remove some. It would be much easier if the footprint pads were protruding out from ...
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1answer
63 views

Can I use two switches on one mouse button? [closed]

I am doing a diy project where I replace the mouse switches with a mechanical switch. I wish to wire two mechanical switches in parallel to a computer mouse left-click button. They will be wired in ...
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4answers
111 views

De-solder component and clean up excessive solder advice!

I am fairly new to working on electronics and need some advice with fixing a circuit board for my pops. I know this is not a chit chat site, so here goes: I located a broken trace from what appears ...
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1answer
4k views

What purpose does this antenna-like accessory serve in soldering?

I got a new soldering station. I received the following along with the station. I am not sure what is the purpose of it. Please tell me. Update: Soldering station details: Aoyue 888A
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2answers
77 views

Cleaning old solder joints

I'm doing a restoration/repair project on a set of ~50 year old speakers. I've got a lot of fuzziness coming out of the drivers and I suspect it's from the potentiometers, so I snipped them out of the ...
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3answers
136 views

An alternative to solder, or a way to stop conductivity through solder?

I'm working on an electrical project with a microcontroller and some basic circuits. The circuits will be contained in a stained glass box and some of the circuit will be on the stained glass itself. ...
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9answers
2k views

Removing solder from stubborn joints [Soldering Advice]

I have a PS4 controller that I want to replace the joystick on, so I disassembled the controller, added flux, added additional solder to all the joints, and removed the faulty joystick with a heat gun....
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3answers
95 views

Waterproof charging of LiPo

I found this thread: Wireless charging Lipo batteries My problem is slightly different. I have 2s Lipo that I need to charge (way less than 1c, overnight is fine.) The problem is that the casing needs ...
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1answer
63 views

Am I designing this charging and booster correctly and why am I not seeing an output?

I'm designing a wearable device that needs charging capabilities and to convert the 3.7 voltage of the battery to 5 volts to power the MCU. I'm using the MCP73871 charging chip and TPS61090RSAR ...
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2answers
671 views

Soldering a lithium battery to existing PCB terminals

I've got a PCB with a lithium battery fixed on board. The PCB has died as the lithium battery has died (for this particular piece of hardware this is a common fault.) See photos below. I'm trying to ...
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5answers
2k views

Does the PCB have to be thinner than through-hole pin length?

If I have a part that has pins that are 1.2mm long. Can I use a PCB that is 1.2mm thick or does it need to be even thinner than that?
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1answer
65 views

Flexible flat cable formerly connected to vibration motor got torn off, does anyone know how I could go about fixing this?

Here are some images to show you what I'm dealing with: From what I can see, the cable used to be glued onto the motor, with solder on the top. I'm not very experienced with such repairs, to attempt ...
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0answers
50 views

Flux to lower solder ball melting point

Is there any such flux? I find the balls on BGAs very hard on my home made oven. From what I gather, mixing up solder types in order to lower the melting point is not the best idea, especially when ...
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2answers
880 views

Recovering from failure to clean off solder flux

I'm currently building a prototype device at work, that involves a QFN-64 0.5mm pitch IC (a PIC microcontroller) soldered onto a SchmartBoard|ez prototyping board. The SchmartBoard instructions call ...
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1answer
61 views

Diagnosing dead soldering-iron

My soldering iron was working fine for a few years. One day, I used it and it worked fine again, then I unplugged it then tried to use it again a couple of hours later but it wouldn't heat up. I took ...
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1answer
102 views

Solder paste and perfboard/prototype board/donut board destroying the circuit?

Does perfboard/prototype board/donut board made of paper or something (at least it's not fiberglass, that much I know) become conductive when heated to the point of becoming black? I'm assuming these ...
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2answers
97 views

Reliable connection for thin wire

I am searching for a reliable wire-to-board connection. The wire is 0.1 mm enamelled wire. The wire is solderable, but the polymer is very temperature resistant and needs to be mechanically removed ...
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2answers
227 views

Is there non conductive solder?

I am making a project in my university and I really need to find a way to glue back together two blocks of the stator (part of an electric motor). As you probably know the sator is composed of sheets ...
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1answer
70 views

Something wrong on my board. ATMEGA328P. Soldering points wrong?

I'm using ATMEGA328P soldered on a protoboard. ATMEGA328P have some outputs that are connected to a RGB LED. The code take as inputs RGB led state from Raspberry and pass these inputs as outputs on ...
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1answer
93 views

Soldering headphone wires with another wire

I am trying to solder the wires of a headset back into another wire with the exact same wiring but I’m unsure how to approach the wires that shield the copper wire. There also seems to string in the ...
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1answer
73 views

How I can solder back this ribbon cable from my alarm clock?

An ribbon cable out of my alarm clock has been cut as image shows: That was attached to this piece of an another pcb: Back: Front: And I want to solder it back. How I can do this?
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1answer
56 views

How to reattach LCD to pcb that has power but no data?

Where do the lcd data connectors actually attach? I have been researching to attach lcd to pcb but every example I find has notiable pins from thw lcd. I can see the pins on the board but how do they ...
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2answers
61 views

Soldering USB sockets and GSM module with hot air

I'm not very experienced with soldering, so I need advice. I'm going to solder this socket - https://www.te.com/usa-en/product-2305018-2.html How should I do this properly? I'm going use a PCB ...
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2answers
164 views

Are all negative terminals on a PCB effectively the same?

I'm fairly new at this and self-taught, so assume I'm ignorant and my apologies for any incorrect terminology. I'm repairing my 3D printer for the third time, and the previous 2 breakdowns and repairs,...
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1answer
52 views

QFN Programming / Tester / Adapter

I need to be able to test a batch of components ordered abroad. Soldering and removing them one by one would take a long time. I need to be able to read this 6 by 4 component. But can't find anything ...

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