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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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Soldering Alternatives for power cord to PCB

After this question and this answer I was wondering what are the soldering alternatives for low power applications, like supplied by 4 AA batteries. I Found online that some use silicon glue and ...
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69 views

Hand soldering SOD packages

Which package is better for hand soldering with solder paste and hot air: SOD-323 SOD-323F; SOD-323FL; Also what is the difference between SOD-323F and SOD-323FL.
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1answer
61 views

Does anyone know of a soldering iron that gets to 900 Fahrenheit? [on hold]

I'm looking for a new soldering iron that will get as hot as the old Hakko 936, but I haven't found anything. All that I've found have the temp range 200-850 F. Does anyone know a reputable brand ...
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2answers
52 views

Arduino Laser Engraver cd drive - what do i connect where?

I am a beginner in the world of circuit boards and electronics, and this is my first real project. I am making a DIY laser engraver, following the instructions in this instructable. Here is the ...
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2answers
67 views

SMD desoldering - struggling to get this chip quik stuff working, what am I doing wrong?

So I have to replace a SMD connector, and although i do have soldering experience, it's all with THT. I watched like 10 different YouTube videos on chip quik, and they all made it look so easy, so i ...
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4answers
181 views

Soldering iron tip

I bought a Toolcraft JLS03 soldering iron and I worked with it for 1 day, after the tip of my soldering iron got black and the solder doesn't stick to it. I watched many videos and scrubbed the tip ...
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38 views

Relation between selective soldering and component height

I learned about selective soldering process for through hole soldering. I am not sure if I am able to use selective soldering if my tallest component is on the bottom side of the board. Can you ...
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1answer
53 views

Correct type of wire for simple DIY projects involving soldering [closed]

I am making my own bluetooth speaker which will require me soldering wire to PCBs etc. However, I am unsure of which type of wire to buy for the project. I understand that positive and negative wiring ...
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3answers
179 views

Lead Contamination when Soldering [duplicate]

I bought a soldering station a while back and was practicing on a kit and had the website on assembly up while I was soldering using 60/40 tin-lead solder. Should I worry about splatter on the ...
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6answers
8k views

Why does my circuit work on a breadboard, but not on a perfboard? I am new to soldering

I'm a total beginner when it comes to soldering, and recently I've been trying (and failing) to solder together a simple circuit I put together for a Raspberry Pi sensor. Although it works fine on ...
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0answers
93 views

Safe Voltage/Amperage for Soldered Wires - aka When to Crimp Instead

I have found a lot of information that circles around what I'm looking for, but nothing that directly answers it. It is possible there is no right answer.     I am jealous of the Macbook ...
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0answers
45 views

Reason for stepped pins on M12 circular connector

I've been looking at M12 circular connectors for a project I'm working on (for example this one, drawing here), and I've noticed that many/all of them have stepped pins that create a 3mm or so offset/...
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8answers
2k views

How can I add “standoffs” to elevate a SMD component above the PCB?

I made a mistake when creating a symbol/footprint for a small (2.0 x 1.6 mm) SMD crystal and didn't notice until the prototypes didn't work. Unfortunately, the boards are tiny and expensive (0.4 mm ...
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0answers
27 views

Using board-to-board pins and crimp receptacles to attach a non-board receptacle to a board

I imagine this is a bit of a stretch, but I'm working through some iterations of a cable harness for a 3D printer. I've considered that a custom PCB may be in order (still on the fence there), but the ...
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0answers
53 views

Interchangeable resistor

I have a PCB board where I am measuring the voltage drop across a resistor which is placed on the Vdd path of a small micro-controller. I would like to have a method for easily interchange the ...
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1answer
87 views

How to remove kapton tape from soldered parts in bulk?

I have PCBs with SMT nuts (SMTSO2060MTJ) which has been assembled onto a PCB - the nut has kapton tape on top to allow easy pickup for assembly. However, removing the kapton post reflow is proving ...
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61 views

How to remove/desolder very minute smd chips safely? [duplicate]

This is the component I'm trying to remove: BU48xx voltage detector VSOF package (attached pic)
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1answer
66 views

LED intermittently fails but works when voltmeter applied

I have an LED in a home project. It's in a simple loop with a resistor and the GND and V+ ends connected to appropriate pins on a microcontroller. The LED works properly for extended periods of time ...
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2answers
760 views

Can a novice safely splice in wire to lengthen 5V charging cable?

I have a 5V 1500 mA charging/power cord for a camera that was too short to reach the mounting position I need, so at the suggestion of my electrical engineer father, I decided to try to lengthen it. ...
2
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2answers
117 views

KiCad: Some pads to solder wires on

I am working on a PCB for which I need external soldered wires. I made the whole PCB with al the traces on the front layer. Then, with 3 vias, I got to the back layer. Here I need to solder 3 wires to ...
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0answers
42 views

help building 6S2P balanced Li-Ion battery pack

I'm trying to build a 6S2P balanced Li-Ion battery pack for a quadcopter using LG 18650 HG2 cells with pre-soldered nickel strips (1st image) so that I won't solder directly on the cell's terminals. ...
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0answers
66 views

Can i replace a De-9 port with something else? [closed]

I was given an old piece of DJ equipment from the late 90s and unfortunately, the only way to connect it to a pc, which is what its meant for, is through a De-9 port/cable. And my pc doesn't support ...
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2answers
83 views

Is hot air only meant for desoldering?

The question is simple. I only ever seem to find a soldering-related hot air gun on a machine dubbed a “rework station” and the only reference I can find to using hot air to solder SMD components is ...
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0answers
62 views

Identifying and replacing laptop motherboard connector [closed]

My laptop was having cooling issues, to I opened it up to clean the fan. When attempting to start it up afterwards, nothing happened, and soon after I smelled burnt plastic. Upon inspection I ...
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3answers
73 views

solder-bridge at ribbon-connector?

I am currently trying to repair a pen-tablet-monitor, which has what i call a 'blind/dead row'. Meaning that i can draw everywhere, but there is this one row, where any input is either picked up by a ...
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1answer
60 views

Subwoofer amplifier IC repair? [closed]

I bought a subwoofer as is. The sub worked, but the speaker terminals didn't. I took a look inside and the amplifier IC(TDA 7265) looks like it shattered somehow. Any ideas what could have ...
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2answers
2k views

How To Repair Ripped Off Solder Pad On PCB

I was trying to flash OpenWrt onto my BT HH5 wireless router and it involves soldering wires to very tiny balls of solder, which in the guides I've been following are referred to as pads. I've tried ...
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1answer
48 views

De-soldering and Re-soldering Lithium battery to PCB

Ive got a Lutron Homeworks 4 Processor that is c. 15 years old, it has failed where there has been a power outage to the processor and the lithium battery on the PCB has not been able to provide power ...
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0answers
34 views

Solder Rigid PCB with Hot Bar Soldering Process

Wondering if it is possible to solder rigid PCB to another rigid PCB using hot bar soldering process/technique? I know it can be done when soldering flexible (FPC) circuit board to rigid PCB, but not ...
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1answer
74 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?
6
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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
199 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
147 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
170 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
38 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 ...
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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
81 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
148 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
49 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
69 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
142 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
65 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
99 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
55 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
108 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
62 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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0answers
50 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
34 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 ...