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.

Filter by
Sorted by
Tagged with
0
votes
1answer
101 views

Beginner question - could this cause a short circuit? (picture)

Hello! I'm very new to electrical engineering and I wanted to ask a question before I attempted something potentially dumb. One word answers are acceptable here! :) I'm eager to learn so any longer ...
0
votes
1answer
67 views

Solder won't melt

I'm trying to remove a solder bridge from this chip. I used flux and solder wick, but the solder on here does not seem to melt. I'm using the Weller PU81 soldering station at 350deg. What do you think ...
1
vote
2answers
68 views

Can I convert usb-male device to usb-female pluggable device?

I have an external audio card, it's small and it has usb-a male to plug it anywhere, well anywhere you have usb-female of course :) I've been using it on the few mobile phones I have. (some are on ...
0
votes
2answers
122 views

What happens if I don't tin my DIY self-etched PCB traces?

Once I etch my PCB from copper-clad FR4, do I need to tin the board with solder? If I do not tin the traces, what are the possible issues besides greening over time?
2
votes
1answer
70 views

Nixie tube project

I just got into Nixie tube clocks. I researched and found all the resources for the project (datasheets, models for Eagle/Fusion 360, etc.) I designed a schematic as well as the board. The parts cost ...
0
votes
1answer
60 views

How to repair accidentally removed solder pad?

Disclaimer: Pardon my lack of knowledge on the following So while I was trying to de-solder a keyboard switch I accidentally removed the solder pad (top arrow) and not only that lost it as well in the ...
11
votes
3answers
1k views

Are filtered solder fumes safe?

I am soldering using lead-free solder for about 1 hour a day with a solder fume extractor that has a carbon filter that looks like the image below. The place of soldering is in a building with ...
1
vote
2answers
53 views

How do JBC calculate the power rating of their soldering stations?

I am having trouble understanding how a JBC power rating is calculated. For example, this soldering iron uses the T245-A handle which uses the C245 cartridges. The peak power is listed as 130W. We ...
36
votes
2answers
4k views

What is the purpose of those star like solder joints?

I recently watched a Xbox Series X PSU repair video on YouTube and was surprised by the fact some solder joints have a star-like shape : Is there any specific reason to do this ? This is the first ...
12
votes
6answers
2k views

Tips for optimizing through-hole soldering

I make and sell low voltage, mostly digital, retrocomputing expansion boards as a hobby/hustle. I use all through-hole components partly because of the retro aesthetic and partly because I find ...
1
vote
2answers
150 views

How to remove solder bridges on a 6-layer PCB - how to rework a board that won't heat?

I made my first batch of 6-layer PCBs. On some of the boards I got a solder bridge on an MCU - I know I need to improve my design, my solder mask, and my mounting method. Usually on 2- or 4-layer PCBs ...
1
vote
1answer
97 views

Via on pad for bga decoupling. Is this ok when hand soldering?

I have understood that via on pad is bad for automatic assembly processes, but can be fine for hand soldering, since it is easy to compensate for the solder that wicks into the via. I am doing a small ...
1
vote
1answer
66 views

Is an aluminum foil wrap working as a shield in my spliced USB cable?

I'm preparing to cut apart a non-trivial $ device and try to extend a 4-conductor cable, so I have been practicing my splicing skills. I figured a USB cable would be a good test. I spliced, heat-...
0
votes
4answers
126 views

What can be soldered with a hot air rework station?

)I'm considering buying a rework station (Aoyue AO968A+220V). What could I expect to solder consistently using hot air that's not "possible" with solder iron? What I've been avoiding from a ...
0
votes
0answers
40 views

Breaking out a few QFP footprint to a small connector

I have a PCB that has an realtek RTS5169 controller IC(QFP-48) on it. The IC itself is attached to USB data lines. I want to remove this controller and add another USB device to the PCB. Now I don't ...
1
vote
2answers
88 views

Training Kit for SMD components

I created my first circuit with a microcontroller, an stm32f446 in lqfp64 package. However I have soldered such tiny parts and I'm struggling a bit and already destroyed one of three chips I bought. ...
0
votes
2answers
83 views

SMT soldering for QFN package without legs

I have soldered through-hole and SMT before but this is the first time I have to do SMT (QFN) package which has no legs. I tried the traditional approach, Flux, solder, then heating the component. But ...
0
votes
1answer
63 views

Do 5 pin soldering stations/irons have standardized pin outs and specs

I need to replace the iron for my soldering station for which the manual provides no specs on the 5 pins nor replacement specs. Are soldering stations/irons that use 5 pins standardized? I mean can ...
0
votes
3answers
104 views

If I solder outside do I need a fume extractor

I've been looking into soldering and read up on the health risks and I noticed you need a fume extractor. I was thinking about using a fan but I don't think that safe. If I solder outside will I need ...
2
votes
2answers
230 views

About 'water soluble solder'

I'm a hobbyist with a few years of practice and managed to make some nice musical instruments for myself, making steady progress over time. For about the last six weeks, nothing I try to do works. ...
1
vote
1answer
76 views

Possible capacitive coupling on soldering iron

I have bought a cheap soldering iron. It seems to work fine. Out of curiosity I tested the metal enclosure (and thus also the tip) with an electric tester and it lit up. Then I tested it with a multi-...
0
votes
2answers
88 views

how to make a hole in the solder like here?

How can I make this hole in the solder?
0
votes
2answers
51 views

How to find out how much voltage and current a soldering agent can handle

Is there any way to find out the maximum voltage and current that a soldering agent can handle based on the material and/or the information that I find on the package? For example, I have this ...
0
votes
1answer
45 views

Solder stripped USB-C cable to Keyboard PCB

The cable that came stock with the board had 4 wires in it. They were red black white and green. Where should I connect them? Also some pads on the right might be lifted so I don't know if it is ...
0
votes
1answer
39 views

THT diode soldering

If I apply more temperature and more time while soldering the diodes (in a leaded process). Will it fail eventually? In case if I use a higher wattage soldering iron is it possible to fail?
0
votes
2answers
83 views

How does one practically test all solder connections on a circuit board?

I'm a hobbyist trying to diagnose a circuit board for a tape deck. One piece of advice I was given was to "check for any bad solder connections". On this circuit board there are around 200 ...
0
votes
3answers
89 views

How to Solder a Screw Terminal to Square Pad Proto Board

I want to figure out the best way to solder each terminal of a screw terminal block to a row of this proto board that has square pads. None of the squares are electrically connected. I assume just a ...
0
votes
2answers
68 views

Questions regarding solder wire for general hobbyist use, mostly just wires together [duplicate]

I am looking to get into hobbyist, "casual" electronics work, and I am concerned about which type of solder I should look at - I don't have any current plans for going to PCBs, just mainly ...
0
votes
0answers
64 views

Can't identify the mistake in my circuit

After finally deciding to transfer my projects from a breadboard to a stripboard, I managed to put this circuit together, but the soldering was the ugliest thing I have ever seen, so I threw it out ...
0
votes
1answer
73 views

How can I identify a salvaged LCD? 21 pins [closed]

I did something that might be considered bad practice. I desoldered an LCD from a fan heater by silvercrest and i'm having some trouble identifying the pinout of it. From what I can tell, pin 1 is GND ...
0
votes
5answers
148 views

Resistors - proper SMD package for newbie

I will be designing an Arduino shield in KiCAD. This will be my first project in KiCAD. Considering I am a newbie in PCB design and I will be performing the soldering, what is the correct package size ...
-1
votes
1answer
93 views

Help, I have a badly soldered plug cable, will it work if I plug it in, will it not electrocute me? [closed]

I wanted to solder a plug wire, but some copper filaments didn't stick to the tin, will I get electrocuted if I plug it into the outlet?
0
votes
3answers
59 views

Soldering the thermal pad of an SMD onto a PCB by heating the bottom with a solder gun

I am trying to build a dimmable LED circuit that consists of 4 SMD LED lights (datasheet: https://download.luminus.com/datasheets/Luminus_SST-10-UV_Datasheet.pdf). I am new to working with PCBs and ...
0
votes
0answers
55 views

What is the name/type of this soldering iron tip?

I have a soldering iron station called Dibotech soldering station 60W which is a temperature controlled soldering station. You can set the temperature of the tip between 50-480 degrees Celsius. The ...
0
votes
1answer
62 views

The Closest Solder to Radio Shack Solder

Does anyone have an opinion or otherwise 'proven notion' of the closest alternative to Radio Shack solder? Please, only answer this question by your own experience, as tons of options out there say &...
-1
votes
1answer
74 views

Connecting I/O peripherals to general purpose (evaluation kit) MCU

I'm new to electronics and am interested in playing around with an evaluation kit like this one. It looks like those pins sticking out of it are GPIO pins, but I can't find a picture that zooms in ...
0
votes
0answers
60 views

How do I actually verify that a flux is made for electronics and not plumbing?

After seeing a question about soldering flux and in particular flux paste which I'm interested in trying, I was reminded that there is a lot of confusion and scare about solder flux. I'm one of the ...
4
votes
1answer
368 views

Are soldering fluxes safe to touch?

I'm new to PCB soldering. I just bought a cheap soldering iron, solder wire and flux to try something. I have no previous experience with soldering. I'm well aware of the potential risks of prolonged ...
2
votes
1answer
63 views

What is “activity” in solder flux?

I'm trying to select a solder flux and so many references (and one or two SE questions) discuss the types and differences. They mention "activity", such as "Rosin Activated (RA) flux ...
0
votes
2answers
93 views

Controlling temperature of soldering iron

I have those cheap 60w chinese soldering iron that runs on 220/240v ac here. Any time I try to solder some ICs it burns them. I know that there are temperature controlled irons in the market but those ...
1
vote
1answer
71 views

How to resolder a broken connection for an LCD component

I'm new to electronics and I would like to learn how to attempt to repair a board like this. As you can see in the image, it looks like someone has attempted this repair before, but the right ...
0
votes
2answers
92 views

Solder paste not melting or sticking

I am a rookie in this area so please excuse my language as I don't know all terms. The solder paste I am using does not either melt or stick and just looks dry when I try to solder a LED onto a MCPCB. ...
1
vote
0answers
50 views

Can I expect a solderpaste circle to reliably reflow onto a smaller circlular pad?

For various reasons, I need to pad a bit more solder paste onto a fixed-size pad, and I cannot change the stencil thickness without messing up other footprints. The pad is a 1.2mm diameter circle, and ...
-3
votes
2answers
75 views

How to find resistor from colour coding [duplicate]

While repairing my soldering iron I damaged a resistor. I need to know the value of this resistor. How can I find the value from its colour code?
6
votes
11answers
1k views

De-soldering Through-Hole Solder

Really out of my wits as to how to completely remove the remaining solder in the 6 pins (LAT,/OE,CUK,DIN,GND,V+). I would appreciate your advice if you have any relevant experience.
3
votes
1answer
69 views

Soldering WS2812B Daisy-Chain

I'm following this project. More specific Step 7: Rainbow Pistil https://www.instructables.com/Ever-Blooming-Mechanical-Tulip/ In the picture bellow. On the top left corner is how I should solder ...
1
vote
2answers
111 views

Noob soldering help: test pad repair

So I haven't soldered in years and only have experience with through hole soldering and large components. Today I attempted a repair with a HTC Vive controller. I know where to solder and managed to ...
1
vote
0answers
84 views

oven rework - possible culprit?

These small LGA16 parts needed replacing: Desoldered them with heat gun, cleaned with acetone, put new parts into place, fixed them with this sticky aluminum tape, applied flux and put them to the ...
0
votes
1answer
87 views

Need some tips on using hot air soldering station for my project

I and my friend have designed a 0.8mm 4 layer PCB for our project. The top and bottom layers are for signal traces and the middle layers for power and ground. All the components that we use are SMD ...
0
votes
1answer
58 views

Soldering question: Which Kester solder to use (Resin-Five vs. SN63) in what situation

I have been soldering electronics projects for 60+ years but have forgotten (if I ever knew) which solder to use in which application. Besides a few short lengths of unknown origin, I have 2 large ...

1
2 3 4 5
26