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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49 views

Insulated TOP3 triac soldered to Aluminum plate — will it last?

So I ordered a cheap SSR from Aliexpress and it finally arrived. I immediately disassembled it to look what's inside. It wasn't so bad -- BTA40-800, MOC3063.. assuming the components are not ...
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31 views

Video card posts (displays video output) only on cold boot, want to make a mini project to learn how to test and diagnose gpu [closed]

Extra time on my hands because of covid, want to learn and hopefully fix my old 980ti as well. I'm hoping somebody can post a link to a forum post with somebody doing something similar, or any ...
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1answer
96 views

Connection problems or burned chip?

I am assembling a board for a wireless charger based on this evaluation module (see here) I own a preheat bed, a hot air gun and a quality soldering iron. I am afraid that after soldering the chip and ...
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3answers
68 views

Can I use 18AWG wire instead of 22AWG when doing guitar pedal modifications?

I'm planning on doing some modifications to my Dunlop GCB95 Cry Baby wah pedal. As far as I can tell, the hookup wire in the pedal is 22AWG (it's difficult to read what's printed on the side). The ...
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2answers
110 views

How would I have destroyed these photodiodes?

I was trying to fix a light sensor module and using a diagnostics tool for it found that 1 of the 4 photodiode sensors was faulty (it was reading 0xFF.) As I don't knowwhich photodiode corresponds to ...
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189 views

How to stop frying components with my rework station?

Recently I decided to invest in a rework station (namely the Yihua 858D) as I am sick of ruining pads when desoldering components. Just today, I have fried £50 in components. I am using the station to ...
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36 views

Water damage repair on solders

So this is the cicuit for a 1h0257j VolksWagen polo vacum pump for central lock. I got it for practice since it was replaced. The question the problematic part seems to be a burned soldering, it is ...
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82 views

Boost converter PCB layout

I am working on the hardware of a boost converter which I will cascade with a buck converter. I will just pose a question on my boost converter since I assume the same knowledge can be applied to my ...
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1answer
96 views

Why does this cable have 3 wires to PCB on one side but only 2 wires on the other end? [closed]

I am working on a stereo receiver and was going to resolder some wiring. When I went to strip one wire on the 3-wire cable, the whole wire pulled out that was bare except for the half inch I was going ...
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4answers
95 views

Fine wire for breakout board soldering that won't break

I've been using silicone sheathed stainless steel wire (30 awg) with a 1.27mm breakout board. The wires cannot be secured (it's tight in the thing I'm building), and they easily break off at the point ...
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2answers
76 views

Have I burnt my MAX II by excessive soldering?

I soldered my first TQFP 100 package, an Altera MAX II EPM570 CPLD, on a PCB. But I only found the "correct" way to solder (put flux on the pads and on the pins, melt some tin on a thin iron ...
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63 views

Change capacitor

I have got a question about capacitor.Used in monitor. Here is my "Broken" capacitor And here is my "New" capacitor. With same parameters but they both have a different I don't ...
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1answer
89 views

How can I connect wire to this push button switch

I've tried all the tricks to solder the pin for this push button, to no avail. Though I feel flux may help it stick (not sure), I just feel there has to be a better way. The pins are made of steel ...
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37 views

Male/female jumper wires for really small and close-to-each-other pins

I have a 20 pin 'male to male' 1mm pitch connector as shown in the included picture (I'm not sure if it's the correct name). One side will be soldered to the board, and the pins on the other side need ...
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4answers
797 views

Burning a transformer and replacing it from 110V to 220V

Today I received a preheat bed AOYUE-AO853A. I was really eager to plug it in an test it, ignoring the voltage input rating. It worked for a second making a strange noise, but then some smoke started ...
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Questions about connecting a JTAG ARM 10-pin connector to a TM412x board

I have a TM4C12x board which I want to debug over JTAG. This board does not come with a pin header attached to the JTAG pins, so I need to solder it myself. I have a couple of questions about this: ...
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2answers
60 views

Equivalent solution to soldering STM32F103C8T6 Board [closed]

There is this project I am doing and part of it I will be using a STM32F103C8T6 Board. Unfortunately, I do not have a soldering kit as i for now I cannot solder the pins of the board. Is there an ...
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2answers
63 views

How to connect to service pads without soldering

I am trying to connect to service pads like the these (the golden, round connectors) my soldering skills are good enough to solder some wire onto these, but I have to check a lot of different pads ...
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1answer
108 views

Which type of surface finish to use for low-temperature SMD soldering?

I have designed a two-sided (components on both side) 4-layer SMD PCB that I will reflow with my solder oven. To do so, I am planning to use high-temperature leaded solder (MG Chemicals 4860P, ~250 C) ...
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1answer
64 views

Can I solder a plug to the end of my irrigation system power supply?

I got a new sprinkler head unit that only takes power input from a barrel plug, here is an ebay listing for the transformer it came with. It's 24VAC AC/AC transformer. Problem is my old head unit was ...
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3answers
162 views

Substitute for solder wire and flux [closed]

So I am trying to get started soldering, but I was wondering if there was any common household component that I could somehow take out the soldering wire or flux. Although any alternatives will be ...
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0answers
49 views

How to solder two USB-C female PCBs together?

I have two of these usb-c female sockets that I need to solder together to make a "gender changer" https://www.amazon.com/gp/product/B00VJ944V2/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&...
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1answer
28 views

Insulating JST-PH solder points

Shown in the image are the solder points corresponding to the two terminals of a JST-PH connector. (Jumper is there as a size reference). They are way too close for comfort for me, especially with ...
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1answer
123 views

How to solder a ultra small chip

I need to use a PAN1780 board for a research project, but there exists no breakout board (only huge evaluation boards), so I somehow need to design my own breakout board and solder the chip on it. ...
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2answers
68 views

Solder various parts of broken wire in a fan coil [closed]

So, in a not that careful attempt to open holes on a fan to get the air to go through it more (it heated up a bit too much compared to another fan in the house), I broke the coil wire in some points......
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2answers
105 views

How solder paste is different from tin when soldering?

I recently bought this solder paste, thinking solder paste should do the trick when not using tin wire. Did I buy the wrong solder paste or does solder paste have another function since looking at it ...
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62 views

File soldering tip to fit in soldering iron

I'm sorry for my english, I don't know how to say it better, but it's not actually the tip like in the end- it's the part of it that goes into the soldering iron. That part - can I file it so it fits ...
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2answers
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What is the reason for yellow tape on top of USB mini-B?

I have noticed that occasionally some USB mini-B connectors have what looks like a transparent yellow tape on their top. It might be Kapton tape, but I am not sure. As an example, please see the below ...
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1answer
120 views

What can I use instead of soldering

Sorry for such a question. I am not very dexterous and have no experience in soldering. I have purchased some momentary buttons. Some are already pre-soldered (both ends). The other others are just ...
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44 views

Micro-USB B - female weird pinout

fixing up a kids toy today that used a USB Micro-B cable/port. The female port was smashed up. I have started to remove the old female socket and noticed it did not use a standard pin out. Rather than ...
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57 views

How to repair a solder pad that came off a ribbon cable?

I've similar questions on how to repair solder pads however all the questions so far only talk about solid PCBs. For some reason the solder pad came off this ribbon cable after I had soldered it ...
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2answers
81 views

How to solder speaker wires back to pcb (Switch)

I have a Nintendo switch lite with the connector for the speaker broken off. I am looking for the best way to fix this. Is it possible to solder directly to the motherboard? I am just looking to ...
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1answer
47 views

How to strongly fix N-type connector to thick RG cable?

Can someone tell me what kind of solder or conductive hardening paste is used here to fix the inner conductor of the cable to the pin. I tried soldering of the pin to such cables with tin, but this ...
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67 views

How much current can a tin solder track handle?

I'm working on a DIY project where I need to control some 9V solenoid valves with an Arduino. I don't have the tools to make a PCB myself, so I chose to work on perfboards. Now, I have to connect ...
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2answers
537 views

Inductor desoldering issue

I am having a problem with inductor desoldering. (Bourns 2310-V-RC) I found a lot of desoldering failure after time. The inductor is used as an LC filter. Maximum 8 Amps. This is the PCB view Are the ...
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Should I solder the shielding wire (braiding) on USB cable for better data transfer?

So Ive cut the USB wire of my racing wheel (like xbox controller) and joined them again, to skip the breakaway USB cable part. While splicing, I Ignored the shielding wires, just picked them off and ...
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3answers
106 views

Replacing the capacitor on an old Philips amplifier

My Philips amplifier broke down (model FA153) and my friend told me it's likely the capicators have worn out (they were produced in West Germany ;)) I am quite the layman in electrical engineering, ...
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1answer
127 views

Tuning of a PID loop for heater element

I built a controller for a soldering iron (JBC C245/C210 specifically), which can supply up to 60W of power to the iron. I have a temperature control loop that runs at 10 Hz, which I am trying to tune ...
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2answers
57 views

How to use LED holder when mounting on a case with pcb inside?

I am making a case with a front and back piece with the PCB mounted on the back piece with LED supposed to be mounted in the holder in the front case piece. I was planning on soldering the LED to the ...
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2answers
106 views

Can I solder two USB cables together?

I've got two USB computer mice, one with a defect click button and one with a defect USB plug. Would there any issue if I simply cut them open and soldered together the mouse part of one with the USB ...
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26 views

ESP32 CAM gpio0 permanently grounded. how to fix?

I bought an ESP32 CAM and flashed it, I connected the UART with example code on the board but always got this: ...
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2answers
39 views

TPS54383 Thermal Pad

I'm experimenting with a TI Dual Output Buck Converter, the TPS54383. In section 11.3, on page 43, the datasheet says 11.3 PowerPAD Package The PowerPAD package provides low thermal impedance for ...
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2answers
143 views

Did a pretty bad job soldering a mouse switch. Is the chip damaged?

My mouse was double clicking so I, who had little to none experience with soldering, tried switching the switch of it. Had tons of trouble desoldering it without a desoldering tape or pump and may ...
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41 views

Soldering help: tip not hot enough

I have a 40W soldering iron and using 60/40 rosin core. I'm soldering wires onto a LED light strip (WS2812B) but the heat isn't strong enough and I might be doing things the wrong way. When I touch ...
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1answer
65 views

Damaged PCB - solder pad missing

have been trying to replace a capicitor on this inherited pcb. Sadly the negative pad for C6 (Orange circle) seems to be missing. Can anyone advise how best to get a capitor seated here? Thanks. PS ...
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67 views

Wire wrap question

I have an electronic organ that I will be repairing in the near future. The boards that need replacing are wire wrapped with 22AWG wire. I have the 22AWG wire wrap tool. If I cut the wires, the ...
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2answers
68 views

Through hole solder pad dimension rules?

Is there an electronic rule or just a rule of thumb regarding through hole solder pad dimensions? That is, if I have a 0.025 inch diameter drill hole (suitable for 24AWG wire), what should be the ...
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2answers
83 views

How to solder wires onto pins of an RFID chip?

I want to integrate a sensor with NXP's NHS3152 (datasheet). To do this I have to solder the wires onto the pins of the RFID chip. What tools should I buy to do this? What is a good reference to learn ...
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5answers
2k views

Would you approve this soldering job? [closed]

I am new to soldering, and I am not sure if I did a good job while trying to solder some pins into a HX711. My concern is that the solder in SCK and VCC are touching (also E+ and E-), so I thought ...
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0answers
44 views

Soldering QFP with thermal pad (but with obstructions/no vias on underside)

I will start by saying that I'm a complete newbie when it comes to soldering SMD. I've been practicing with scrap boards, and I'm getting there, but not sure how to approach this one. I am trying to ...

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