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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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63 views

Where can I get this connector / what's it called

It's for connecting an LCD to the driver board via a flex ribbon style cable shown below: Also, is there any hope that I can solder this with a hot air gun?
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4answers
2k views

Probably overheated black color SMD pads

Can you give me an advice what to do with probably overheated SMD soldering pads on the board? The photo is of a computer bus card, where there are 4 SMD 0603 positions labeled R1 - R4. They are used ...
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4answers
164 views

Soldering one PCB to another with 90 degrees angle

I want two PCB's to be soldered with each other in 90-degrees style. I think that the base PCB should have a slot with the width equals to the top board thickness. The top board should have a flange ...
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1answer
46 views

Solder Type for Electrical Clamp

What type of solder should be used for attaching electrical wire to a large clamp (base wire will be screwed into clamp handle). I am making a fractal wood burning device so current will be coming ...
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2answers
108 views

How do i solder qfn package using soldering iron?

I don't have any soldering station but I need to solder the qfn package chip so how I solder it using a normal soldering iron.
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1answer
160 views

Repairing old computer, randomly reboots due to something is wrong with “reset” circuitry

I'm working on a TRS-80 Model 100. Not long ago, I have done some capacitor repairs after experiencing random reboots. I've skimmed through some online manuals, and it seems that somewhere in the ...
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1answer
28 views

Connect TFT LCD screen with flex band to breadboard

I'm asking for clues on how to do this, I didn't found much over the internet as everybody buys their LCD screens with a mounting to the breadboard of as a shield for arduino. The TFT screen I bought ...
2
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1answer
66 views

Limiting current of a transformer used for resistance soldering

I'm working on a device capable of soldering wires to tiny components (3mm brass rings). I've used a PSU of a computer to make a resistance soldering device. Using the 5V line and a graphite stick of ...
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1answer
65 views

Soldering XLR Cables together

I'm aware that the structure of a balanced cable is an integral part of maintaining signal quality. If I was to solder two XLR cables together in an effort to make one longer XLR lead, what would be ...
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3answers
101 views

How to correctly use a set of pogo pins?

Following the excellent recommendation to a previous question of mine (on what to use when I want to connect to a board without soldering), I got hold of pogo pins. How to use them correctly, when in ...
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1answer
33 views

Soldering Iron and Electrostatic Bracelet Connection

I have a DIY soldering station and I want to ground the soldering iron and I also want to use a electrostatic bracelet connector for the soldering station. Can you please help me how to connect the ...
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0answers
64 views

How do I identify and work with this thermistor

I've got a PTC thermistor, as pictured. It's being used to detect the output temperature in an in room eletrothermal storage (ETS) unit from Steffes. One of them fell out. It's like some kind of ...
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4answers
116 views

Soldering breadboard wires onto a small chip

I have some DWM1000's that I need to use for a project. One will be connected to a raspberry pi 3 B+ as the tag and 1-4 others will be connected to arduino's as the anchors. I am having trouble though ...
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2answers
49 views

What solder for low temp removal and resoldering to pcb

Have an issue with some legacy system - need to replace throughhole parts on PCB in situ while PCB is sandwiched between two sheets of acrylic with only small holes to access the leads on one side (i....
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3answers
70 views

Connection for tungsten heater

This is my first post, so hello all :) I have a tungsten wire thats wrapped around a crucible. I want to send ~20A through it in order to heat the crucible. Now the tricky part. Since this is part ...
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1answer
49 views

solder wire makes solid & glassy residue

I know using flux makes some residue which makes unwanted contacts between components pins. I dont have any washing liquid or spray to remove it so i simply decided to not use them. But my solder ...
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0answers
34 views

Ac signal of soldering iron tip

Did you noticed that when holding a LED with bare fingers and connect it to a soldering iron(ac type) it gets a little bright. I did it for other components to reduce their heat during the soldering. ...
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1answer
73 views

How to solder SMDs on metal core PCB?

I have a bit of soldering experience but look for instructions on how to solder on an aluminum core PCB. The PCB is for high power LEDs that dissipate a lot of great, hence the metal core. The ...
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1answer
46 views

Can resistors be used to bring a heating element within range?

I have a replacement 24V/60W desoldering gun I would like to modify for use on my Aoyue Int958A+ soldering station. My 968A+ has a smoke absorber which has enough suction to double as a solder vacuum. ...
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49 views

Why do heaters vary widely in resistance even though they have similar power requirements?

I have a soldering station equipped with a 24V/60W soldering iron. Its heating element (pins 1-2) resistance measures around 50 ohms. The resistance of the thermocouple (pins 4-5) measures around 2 ...
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0answers
27 views

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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3answers
124 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
111 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
79 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
79 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
62 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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0answers
39 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
69 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
67 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
78 views

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
70 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
108 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
861 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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2answers
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
104 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
352 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
744 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
54 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
88 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
94 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
42 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
299 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
105 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
82 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
100 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
85 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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1answer
283 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
142 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/...