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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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How to solder a trrs 2.5 cable to an old charger

I need to solder a trrs 2.5 cable to an old nokia charger, so I can charge my JBL E40BT headphones. My problem is I got the cable from an old set of earbuds, and I don't know what cable goes welded ...
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75 views

Solder Core Size

Pardon the very simple question, but I am a beginner looking to buy my first good solder for through hole work. I was looking at a 63/37 Kester 285 or AIM RMA, but one thing I’m curious about is the ...
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2k views

Desoldering/soldering 1/4" chip with eight pins

I need to transfer a working eight-pin 1/4" (4 mm) chip from the top PCB to the bottom PCB that has a non-working chip. Is there a special soldering tool for such micro soldering? Has anyone tried ...
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1answer
96 views

How to solder resistance wire?

For the kids of my electronics tinker club, I thought it would be a great experiment to see how the resistance of a wire is proportional to its length. Therefore I made a very simple circuit ...
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2answers
68 views

What bluetooth chip should be purchased to solder onto the Nook motherboard? [closed]

From what I researched the e-reader's motherboard contains three unused serial ports that can be connected from gps modules to bluetooth chips. U2713 PIN OUT CLOSEUP The article that gives ...
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1answer
53 views

Problems wiring USB-C receptacle [closed]

(First, sorry for my English :_D) I'm doing a school project and I wanted to swap a male/plug USB-C to a USB-C female/receptacle. I thought it was just soldering the cables onto the board and it's ...
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2answers
59 views

Soldering station: power confusion

i wanted to ask what the different power/watt indictors for a soldering station actually mean in terms of the performance of the station or whether the number is just some marketing term. Some ...
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2answers
1k views

Double-sided Assembly

I'm going to assemble a prototype PCB which have components on both sides. I have access to a reflow oven with profiling control, solder paste and stencils (from OSH-Park) In the reflow process for ...
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37 views

Brass wool versus steel wool [duplicate]

We're using this kind of solder sponge made of brass in our electronics course: One kid told me that he had seen this before. I wondered a bit, because they are all new to soldering. Finally he ...
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1answer
60 views

Solder or Adhesive for Wifi Module

I am replacing a wifi module for my smart tv. I have any never done this before and want to know if I need to solder the two components together or just use an adhesive like in the old module. The ...
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0answers
60 views

Solder won't stick to iron [duplicate]

So, I bought my first soldering iron. (I used trafo until now..) It was pretty cheap, wasn't expecting much from it. Wanted to try it out, but the tip turned black. (Picture included, sorry for the ...
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2answers
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Best way to terminate fine gauge polyurethane magnet wire

I am winding custom coils with AWG 32 polyurethane coated magnet wire and need to solder the coil leads to ~AWG 24 standard insulated wire so that they can be connected to a terminal block. What are ...
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1answer
52 views

Old Weller replacement tips source?

I have a ~20 year old Weller station (base: 921ZX-0, iron: 9216, tip: U9960) for which I've lost all but the 9960 tip. Searches for Weller/Ungar 9960 as a starting point for finding compatible tips ...
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1answer
80 views

Wave soldering of SMD components

I understand that wave soldering is typically used for soldering through-hole components as shown in this picture: However I read that wave soldering can also be used for SMD components: my ...
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2answers
826 views

Can DPAK be used in a through hole pcb if desperate?

I purchased the wrong component, have no time to order another one. Best way to go about doing this on a PCB with the plated holes? https://www.mouser.com/ProductDetail/vishay/irfr9214pbf/?qs=...
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1k views

What is the effect that makes components on a circuit board move into place?

I am going to apologize ahead of time if this is a really simple question. I started learning to solder during my internship but I had no EE knowledge prior. When I was working with surface mount ...
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1answer
85 views

How to solder this broken Gameboy Color part back on?

I'm trying to repair a GameboyColor where a part that held a battery broke off. I tried soldering it back on but it didn't stick. (I'm new to soldering) I took some pictures, any feedback and advice ...
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1answer
200 views

Beginner Question - Solder won't stick to a certain wire

I am trying to tin some wires as they won't stick to the IC pins that I'm soldering them to. The problem I am having is that the solder won't stick to the wire. My iron is fine as can solder other ...
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1answer
728 views

What is wrong with this soldering iron?

It's body is blackened, just after 5 minutes of heating and it's body is also bent. How can I solder when the iron itself works so poorly? P.S: I am using it for the first time.
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1answer
47 views

What is Soldering temperature of STM32F303 IC chip 100-pin?

I want to solder a 100-pin STM32F303 IC on a PCB. What is the recommended soldering temperature? I could not find it in the datasheet.
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3answers
80 views

How to solder on a new USB plug/connector

I bought a USB WiFi card, but then the metal part broke and I had to take it off. I only have the board now and it is too small to fit into a USB port. Where can I find a new USB head/plug (the silver ...
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1answer
57 views

Nichrome pcb soldering

I want to know if it's possible soldering pcb using nichrome wire instead of lead. Specs say Nichrome wire melting point is around 1440 centigrade. Which is achievable with a tiny flame. Is there a ...
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1answer
34 views

Why is there a grounding clip on this solder sucker instead of a third prong on the plug?

As most of these inexpensive tools tend to omit the ground altogether (such as in soldering irons), why would ground be added as a clip instead of a third prong? Is there an advantage for it to be ...
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1answer
186 views

Is it OK that I solder inside my bedroom? [duplicate]

I'm a hobbyist solderer using tin lead solder to occasionally repair broken electronics. As I don't solder all day every day, I use my normal writing desk in my bedroom, which stands next to my bed, ...
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1answer
74 views

How powerful of a soldering iron do I need for this job

I am working on a 12"x 18" board that has multiple ground plane layers. I am trying to remove a through component that is tied to these ground planes. My 65 watt Hakko iron heats up the entire board ...
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1answer
76 views

When I rework an SMD capacitor or resistor, it will sometimes stick to the soldering tip. Does this high temp then destroy it?

When I rework 0402 capacitors, then often stick to the tip of the soldering iron. My iron is set at 350. I then discard the cap because I am worried the sustained temp for a few seconds has destroyed ...
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3answers
95 views

Converting a soldering station from 110 V to 220 V

i bought this soldering station from the USA and it is 110 V. I need it to be 220 V. Is this possible without external tools? There are 3 Trimpots: V1 VR1 VR2 This is the inside of the station:
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2answers
66 views

Soldering tab terminals without using holes

I cannot find any information about a practical problem I encounter. If we don't have crimping tools, when soldering wires to tab terminals with holes as below: Do we need to pass the wire through ...
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0answers
48 views

Repairing DC Jack - What are all the things I'm doing wrong here?

I have a Lenovo Ideapad 110s as a beater, around the house laptop. It's a very low-spec computer, but I run Xubuntu on it and it does its job well. Several months ago, the positive pin connecting ...
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1answer
138 views

Can I use a 220v soldering iron on 110v? [closed]

I ordered a 110v soldering iron, but received one marked 220v 60w with a usa-compatible plug. If I plug into 110, will it still heat up?
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1answer
121 views

Can't find source of hum in left channel of bluetooth speaker that I built

I have an RN-52 bluetooth audio module - https://cdn.sparkfun.com/datasheets/Wireless/Bluetooth/rn-52-ds-1.1r.pdf I am using it with this amplifier - https://images-na.ssl-images-amazon.com/images/I/...
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1answer
60 views

Can I modify my 120v 30a soldering iron to be hotter? And how? [closed]

Not getting hot enough and solder melts real quick and rolls away.
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2answers
68 views

Reworking WAGO 2060 on MCPCB

I have about 50 or so 1'x2' Al-clad MCPCBs, each with hundreds of LEDs attached. Each panel has 4x WAGO 2060 terminal blocks mounted at the corners. Unfortunately the WAGO connectors have sustained ...
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1answer
81 views

Worthwhile to create some 'building block' PCB instead of handsoldering?

I am still busy with my DMX splitter. The circuit is (at least for me as beginner) quite exhausting to hand-solder. See circuit below (sorry for my 'artwork' as some used to call it, it benefits me a ...
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2answers
108 views

What's that metal wounded filament sponge looking thing and what is it used for?

I'm new to soldering and ordered a cheap starter kit. It included this: I have no idea what this is. Any hint?
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1answer
43 views

Driving power + USB over cartridge connector [closed]

I hack old hardware (mostly microcomputers) by putting new insides in them, but I still consider myself a newbie when it comes to electrical engineering, so please bear with me, because this question ...
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1answer
58 views

How to prevent noninsulated wires close together during manual wiring a PCB?

Actually I have two problems, but this one is most annoying: I have like 10 wires I want to solder to the pins of a pin header (2.54 mm distance apart). Initially I kept like 5 mm of the end of each ...
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3answers
141 views

Can a resettable thermal fuse be soldered?

Earlier related questions: How to solder a 70 °C (158 °F) thermofuse Using a thermal fuse in a PCB terminal block? History: I 'normally' soldered a nonresettable thermal fuse, which (of course) ...
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1answer
57 views

Soldering double deck pin headers

Please take a look at a PCB like this one (STM32 Nucleo64 board): They utilized so called "double deck" or "stacked" headers, meaning they can be used from both sized (top and bottom). My question ...
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8answers
6k views

How to solder a 70 °C (158 °F) thermal / temperature fuse

For my DMX project (schematics is not important), I soldered this temperature fuse which has just two leads (see picture below). The fuse doesn't work (meaning it does not conduct electricity) ... ...
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1answer
29 views

3.5mm, 4 conductor, in-line, plug

I am struggling to find pictures of the plug I bought to figure out where to connect speaker wire to. It is a TRRS 3.5mm plug ...
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1answer
61 views

Adding wires to existing board. Not sure where to solder them

I'm trying to modify a small USB keypad to attach a foot switch to it, that would trigger the enter key. I disassembled the keypad and figured out which pins I need to contact to make an enter ...
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0answers
117 views

Soldering sensitive components

I am working on a project called LM317 power supply. The schematic is from the internet, and contains the regulator, filter capacitors, rectifier, potentiometer and protection diodes. I designed a ...
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1answer
152 views

Through-hole solder sparking

Here is a simple example of what been happening to various pcbs when I play with them. I have an arduino powered by USB. Then a 5V and GND connected to a logic level shifter's HIGH and GND ...
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1answer
584 views

Can I use steelwool for soldering iron cleaning

Wondering should I use steel wool for cleaning my soldering iron tip. Is it bad? Will it impact my tip? Will it clean the black oxidization off?
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3answers
111 views

Remove 0 Ohm resistor (solder bridge jumper)

I have an STM Nucleo-64 board that I want to power from my own 3v3 rail. To do so you must remove two solder bridges (SB2 and SB12 in the photos), both made with what appear to be size 805, \$0\Omega\$...
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3answers
93 views

Makeshift SMT Station. Any suggestions? [closed]

I am trying to do some surface mount soldering for my project and have hit a few snags. My hot air gun works perfectly fine for most of the PCBs I am making but one type in particular is problematic....
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65 views

Electronics at high acceleration

I would like to meaure g-force (100 - 4000 g) within a centrifuge (I know it sounds silly because it can be calculated but it is more of a learning thing). I thought of a 3d printed enclosure housing ...
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2answers
1k views

Shunt resistor, what value should I expect when soldering on PCB?

I am using a 10 mohm 1% shunt to measure current via voltage drop. My circuit is on a breadboard... It behaves as if the shunt has a value of ~30-40 mohm instead of 10 mohms. I double checked this ...
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1answer
86 views

Is it safe to solder headphone's cable that connected a pc by 3.5mm jack [closed]

While I fixing headphone, I wore headphone on my ear and plugged in headphone wire to my computer. Then I was soldering the broken cable of headphone. When solder tip touch the cable, it was listened ...