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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8answers
3k views

How can I solder or mount this potentiometer on a PCB?

I need to use this potentiometer: (Vishay 534-11103) …on my board but I don't know how I can do that. I appreciate any ideas or replacement suggestions. Manufacturer's datasheet link here. As asked ...
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1answer
32 views

Solder pad dimensions for small SMD

I'm currently designing a board and one of the SMD components has a particularly small package of 1.5x2.5 mm (CYSJ106C datasheet). It doesn't have a recommended landing pad in the datasheet and these ...
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1answer
82 views

What are these soldering lines in following pcb?

I have a switch mode power supply (flyback) LED driver. I just wanted to extract its schematic but some straight parallel lines of soldering made me confused. Both layers of this pcb is presented in ...
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798 views

Solder paste storage

Solder paste should be stored in a refrigerator and it has an expiration date. But what exactly will go wrong when it is stored at a higher temperature or past its shelf life? From what I know, solder ...
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1answer
56 views

Soldering iron resistance reading

I’m learning about electrostatic discharge and I’ve read that my soldering iron should have a ‘grounded tip’ which I think means its power plug should have an earth prong which it does. I took a ...
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2answers
104 views

Replace a DC jack I messed up. Can I bypass the DC jack or run from the batteries? [Sampler SP-202]

Is anyone able to help me fix/replace a DC jack? I messed it up and the board I need to fix used batteries as well but now they wont work because I butchered the DC pads. Is there a way to bypass the ...
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1answer
126 views

What is wrong with my circuit and how can I fix it?

This circuit used to work before I soldered it. When I initially soldered it, I used a 6V battery and it was oscillating, but the speaker was very quiet. I went with a 9V battery and I re-soldered ...
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1answer
62 views

Why do some SMA connectors have a rectangular center pins?

I came across an edge mount SMA connector where the soldering portion of the center pin is rectangular rather than round like normal. My initial assumption is a stronger solder joint. Any other ideas? ...
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2answers
100 views

Is there a good solution for attaching wires onto a PCB which needs to be plugged into some sockets?

I need to plug an OpenCM9.04 A-type board into an OpenCM485 expansion board and connect some cables to the gpio sockets. From the manufacturer, the gpio sockets on the OpenCM 9.04 board are through ...
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2answers
54 views

How to attach cables to micro JST pins

Are there any methods to attach cables to micro jst pins without soldering nor crimping tools? I can't solder the cables in place due to how small the holes for the female jst pins that any amount of ...
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1answer
58 views

Comparing heating soldering with high current cold heat soldering

which is more harmful to electronic components, mainly semiconductor ones, heat of heating solder iron or substantially high current of cold heat soldering (basically just miniature arc welding)
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Connection for micro USB connector

I would like to solder micro USB connectors on my PCB, only for power (no data). I did that connection, but when I soldered it and connected the cable I could not have any power. Is my connection is ...
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0answers
39 views

USB-C breakout board, using V and G with a NiMH charger am I doing this wrong?

I’m pretty new to electronics so trying to find my way around. I’ve purchased this breakout USB-C: https://www.amazon.co.uk/Chenyang-24pin-Female-Socket-Connector/dp/B00VJ944V2 And this NiMH battery ...
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1answer
64 views

How much current can a solder joint carry?

I built a PCB to run some stepper motors. In the past I created some PCBs to turn on/off LED lights but that's the first time I will supply a motor. The current will be higher than my previous ...
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5answers
2k views

Is it possible for a circuit to heat up enough to bridge solder?

I have two lights that I use for working on stuff in my shop, and it seems like the PCB heated up enough that solder between two leads actually melted and bridged itself. The light was working great ...
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1answer
120 views

Very interesting behavior of an IC

well an IC bring me from a my friend who is workin in a toys company for kids. this IC is coming as almost ready from Chine, all soldering parts are ready and than the company only soldering the ...
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1answer
86 views

cigarette lighter power plug; how to wire?

The part https://www.digikey.com/en/products/detail/mpd-memory-protection-devices/ZA1030/2439603?s=N4IgTCBcDaIF4EMCMAGAzCgtAOwCYgF0BfIA and the drawing https://www.memoryprotectiondevices.com/...
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0answers
49 views

Attaching Arduino TFT LCD screen to Pi 4 without soldering it on?

Note: Already asked on raspberry stack-exchange. I was directed to this community instead. So I have this product: https://learn.adafruit.com/2-8-tft-touch-shield/lcd-test My goal is to connect it to ...
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1answer
61 views

WS2813 Lead Wire Issues

I've wired a set of WS2813 leds to a Raspberry Pi. The led strip is found here: https://www.amazon.com/gp/product/B077J27Y4X/ref=ask_ql_qh_dp_hza When I have this strip connected via the short cable/...
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1answer
135 views

How can I prevent lead free solder from ruining my soldering iron tip? Can I re-tin my tips?

I have been using a Weller WLC 100 for about 10 years, and I have always used this conical tip from Apex Tool Group: https://www.mouser.com/ProductDetail/apex-tool-group/st-7/?qs=...
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1answer
84 views

How to add solder traces on PCB surface

I have a PCB with a mechanical relay and traces rated for 20A at 120V. I noticed the traces are heavy but also have solder on the actual surface of the board. I am interested in doing something like ...
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1answer
72 views

How close the soldering joint for pcb?

I am soldering a 5-12V 5-8amp max electronic to a pcb board, without a schematics. I just want to ask how far should each joint in PCB board? what I mean is for example a cathode and anode when ...
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1answer
81 views

What is the recommended maximum length of time to leave a soldering iron hot, to prevent damaging the tip?

Let's say I'm soldering a PCB, and re-holster my iron, still hot at 320 °C, to fiddle with some components or documentation. How long will it be before tip damage occurs? In other words, what is the ...
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1answer
57 views

Connect 2 BGA pins before soldering IC?

My first thought was it's not possible but I need a method that could potentially work, just for testing purposes. What I'm trying to do is the following: I forgot to breakout one BGA pin that I need ...
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0answers
63 views

Which is more robust against temperature cycles, solder or wire wrap?

When connecting a bunch of components in something that will be subject to repeated heating and cooling, are soldered joints likely to be more or less robust than wire wrap? Intuitively, it feels like ...
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2answers
86 views

Just chopped two USB cables,but one of them looks unusual

I just chopped two USB cables but one of them has three white cables and one grey. The other wire has normal colouring of:-Black, Green, White, Red First wire: White White(has single orangestrand) ...
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2answers
111 views

Can’t seem to solder vertical plug mount USB C connector

I’m trying to re-mount a vertical style USB C connector, but I can’t seem to make a strong physical connection. After soldering, the connector comes off fairly easily. Upon closer inspection, there ...
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0answers
40 views

Do I need to alter my reflow profile for a PCB with thicker copper?

I have always been working with pretty standard 1 oz. copper PCBs and using a Controleo3 reflow oven with great success. However I am now working on boards that will potentially have 3oz or 4oz copper ...
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0answers
67 views

How to fix low LED light?

I've connected my LED to 1K resistor. When I tested it out on a breadboard it worked fine, the LED was very bright. Now, when I soldered it to the board, the LED light is poor. I did everything the ...
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1answer
103 views

Help understanding a heating iron circuit component

I am trying to understand a soldering iron PCB circuit. I am trying to use a different range circuit for my prototype. Can someone please elaborate how it is controlling the temperature? Secondly, I ...
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4answers
127 views

How to wire LEDs and CR2032 battery to make it work

I've got a problem and it seems that there is an issue with understanding electronic's fundamentals. I've got inspired by Jiri Praus video I am trying to make this Rabbit-shape circuit to work. What ...
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2answers
243 views

Solder won't stick to metal tab, no matter what I do

This is an insane problem that I have had for 10+ years and never solved it: When trying to get solder to stick to metal, it won't. Not hot enough? I scorch the piece in lava heat for what seems hours,...
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1answer
66 views

Through-hole soldering issue [closed]

I had some hard time soldering new switches to my computer mouse, now it looks like I lost some solder pads, what shouild I do? Every other component of the PCB seems ok cuz I didnt touch it. Photos:
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2answers
57 views

How to attach wires on a keyboard controller PCB

I want to make a module with 3 momentary buttons that will be record the numbers of pushes on a pc. For this first i though about using an arduino but also I am trying to use a keyboard motherboard/ ...
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1answer
59 views

Migrating from USB 3.0 Micro B to Type B connector

The current design uses a Micro B connector for the USB 3.0 connectivity. Unfortunately, this connector is susceptible to mechanical stress if the PCB is not handle with care, which results in ripped ...
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2answers
49 views

5 Pins soldered from a USB 2.0 type A cable

I have just recived a new product and I want to replace the permanent USB cable that is soldered to the board with a shorter female end USB. The problem is that when I disassembled the item I saw that ...
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0answers
43 views

DIY battery pack with 18650s

Little backstory: I built an electric skateboard about 4 or so years ago and like 6 months back I was riding it at my normal 35 mph and a solder joint came loose on a battery and opened the circuit. ...
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1answer
62 views

Power controlling a soldering iron

I have used a single rectifying diode to lower power of 60W Chinese soldering iron due to overheating. Though I am pleased with the result, I still plan to have variable power output for heavy ...
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1answer
50 views

Help fixing a power switch

While disassembling a Sega Saturn to clean it, I removed this power switch: I needed to separate the top grey button (1 in the image) from the rest of the switch. After verifying with a multimeter ...
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1answer
75 views

Is it possible to solder a USB cable directly to a board?

I'm working on a design for a PCB carrier for Raspberry Pi Compute Module 4, and I need to connect by USB 3.0 a wire to this carrier board. Is it possible to solder it directly to the PCB in order to ...
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4answers
109 views

Using and maintaining lower end soldering iron tips without destroying them

I bought a low end soldering iron of eBay - it was advertised as a "15 in 1 Soldering Iron Kit", and was advertised as temperature adjustable. It has a dial to adjust the temperature with ...
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2answers
70 views

Fixing a missing solder pad [closed]

Shown below is the PCB of a panel controlling an electric scooter. I accidentally managed to pull out all the wires so they looked as in picture 1. I wrote to the company who advised me to solder it ...
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2answers
78 views

solder/join single copper filament to contacts (speaker tweeter)

As a result of the careful shipping of UPS, my speakers arrived with broken tweeters. One tweeter in particular has had its connections severed when the plastic support broke. I need to re-connect the ...
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2answers
62 views

Soldering XT60 connector

I tried soldering cables to the female XT60 connector but no matter what I did, my solder did not stick to the metal part of the connector. I had no problem with the cables though. Any idea about what ...
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0answers
47 views

TTP223 capacitive sensor on USB switch takes two presses to work

I'm trying to solder a TTP223 capacitive touch sensor to a USB switch (specifically a "UGREEN USB 3.0 Switch, 2 In 4 Output") to rig a sort of capacitive KVM switch to a desk PC I'm building,...
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1answer
122 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 ...
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1answer
81 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 ...
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2answers
77 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 ...
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2answers
131 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?
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1answer
95 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 ...

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