Questions tagged [soldering]

Soldering is the metallurgic process used to fix electronic components to a PCB, usually with a tin alloy. Soldering can be done by hand or automatic. PTH boards were usually wave soldered, SMT uses reflow technology.

Filter by
Sorted by
Tagged with
0 votes
2 answers
75 views

Wiring USB-C connector to micro-USB

I have some problems wiring the micro-USB cable to a USB-C connector. I have used the wiring scheme found here, but neither the data are transferred nor the power is supplied to the device. The ...
jack23456's user avatar
3 votes
2 answers
918 views

Beginner: Solder won’t flow onto thermostat tabs

I’m trying to repair my espresso maker with a new thermostat but am unable to get the solder to flow. I’m a beginner but have had some experience soldering my own guitar pedals using stripboards in ...
tylorreimer's user avatar
1 vote
1 answer
85 views

What features to look for when buying a microscope?

I have been looking at different microscopes for soldering, specifically for micro-soldering (SMDs). I have seen the dinky USB microscopes, the smaller pedestal-type with small screens, units mounted ...
agarza's user avatar
  • 113
-1 votes
0 answers
38 views

Reusing an old camera's sensor chip [closed]

I just dug out an old camera out of the attic, what seems to be something from the Olympus Cam media lineup (don't remember which version). It's been dinged up and smashed pretty much, but I have the &...
bepispasta42069's user avatar
0 votes
1 answer
31 views

I'm trying to connect an AS3933 chip to a CAS143-47

So basically AS3933 has 3 pins (LF1P, LF2P, LF3P) which need to be connected to pins of 3d antenna (CAS143-47 in this case) and to common ground LFN. My CAS143-47 antenna has 8 pins with 3 pairs of ...
Angela 's user avatar
0 votes
1 answer
72 views

Will my stuff be "leaded" when soldering? [closed]

I've been soldering for some time now. I use 60/40 leaded solder. I usually wash my hands after soldering, but while soldering, I often touch other things, for example: phone, pendrives, keyboard and ...
Benedek Hirth's user avatar
0 votes
3 answers
117 views

Solder is getting 'pasty' when heated

I am not an expert at soldering but I am good enough for simple tasks. I am trying to solder some wires to a PCB. If I use some 'old' solder (Radio Shack, 60/40 Rosin-core) I get a result that is ...
Pascal's user avatar
  • 3
4 votes
4 answers
651 views

Are there any techniques for soldering USB-C 16 pin?

I am trying to solder Type-C SMD USB connectors but I can't do it properly. Despite using an SMT stencil for soldering, each time I am having an issue and I can not solder it properly. Sometimes pins ...
mehmet's user avatar
  • 1,129
4 votes
3 answers
173 views

Can I solder a press-fit connector with large footprint holes?

For my project, I designed a PCB using press-fit connectors. However, due to the footprint error, the holes were larger than they should have been, and these PCBs are 8-layer high-speed PCBs. ...
esat's user avatar
  • 51
2 votes
2 answers
108 views

Using solder to extend RTD cable?

I have a 3 wire RTD sensor (Pt100). The leads coming off of it are not long enough to reach our temperature controller. I bought some RTD extension cable (3 wire) from the same company. Is it okay to ...
Open_Hamster3337's user avatar
9 votes
2 answers
803 views

Ways of improving USB-C mechanical durability

Many PCB-mounted connectors, in my case a USB-C have no specification regarding mechanical integration. Often, the mechanical durability seemingly relies on through-hole (sometimes even surface mount) ...
NoobPointerException's user avatar
0 votes
0 answers
52 views

Crystal load capacitor physical defect

I have a 16MHz crystal that is used to derive a 60MHz PLL. I have not seen many issues but have a PCBA that loses its PLL lock. I'm not sure why but I looked at one of the load capacitors up close (...
Orca_StackOverflow's user avatar
0 votes
3 answers
169 views

Is soldering flux absolutely necessary for lead-free solder?

Looking through videos of people soldering fine-pitch IC packages (like SOIC, SSOP, SOT), they usually use a large amount of rosin-core flux to make the joints nice and shiny. I have lead-free solder (...
lemon's user avatar
  • 403
1 vote
1 answer
67 views

Choosing a strong/flexible wire for Piezo bender

I am using AB4113B The issue: Due to vibrations wire soldered on the Piezo is breaking. The setup: Piezo (metal end) soldered on a PCB directly, and wire is soldered on ceramic part to a PCB pad close ...
Anurag Kumar's user avatar
1 vote
3 answers
169 views

How can I get rid of oxidisation of my soldering tip? [duplicate]

I recently installed a new tip on my soldering iron, but when heating it up for the first time (target temperature: +370 °C), it got a reddish plaque (some kinda oxide, I suppose), so that it it's ...
Neppomuk's user avatar
  • 575
3 votes
5 answers
901 views

Tolerance of board-to-board headers

I am designing two boards. The bottom one is the power board that contains power switches on IMS (metal-clad board), while the top board is the logic board (4-layer FR4). Board to board height is ...
Eng Sam's user avatar
  • 479
0 votes
0 answers
45 views

Solder Wave Residue

Issue: 1-3 days after maintenance, chunks of solder residue starts to show in the solder wave bath. This creates blockage in the nozzle. Any notes how to solve this problem? Notes: No new chemicals ...
l-Inġinier's user avatar
3 votes
2 answers
129 views

Cheap vs. expensive reflow oven

I am trying to build my capacity to solder SMD onto two-sided boards. As far as I understand, for example from this post, a reflow oven is better than a hotplate for reasons of uniformity in ...
villaa's user avatar
  • 139
9 votes
6 answers
4k views

Soldering iron tip gets oxidised

I’ve been soldering (amateur level) for about 2 years now and a common issue I keep facing is the tip always gets oxidised. I recently bought a new tip and I’ve used it 4 times. The first three times ...
Syed Zain Ali's user avatar
2 votes
1 answer
96 views

How hard is it to DIY soldering (reflow smt) a image sensor\silicon die to FFC cable?

I have a need of a rapid prototype of a image sensor and rolling my own image sensor die. For example, what if I wanted to mount an AR0130cs sensor to an FFC? I don't care about dust or contamination, ...
Voltage Spike's user avatar
  • 82.6k
1 vote
2 answers
127 views

Soldering PCB to PCB - how

I have designed and then manufactured a a PCB that is basically a WiFi thermometer with MQTT capability. The PCB hosts several components, plus an 18650-type battery holder capable of holding 2 ...
mrcsrplln's user avatar
3 votes
3 answers
137 views

How to reliably connect an SMA connector to two pieces of stainless steel?

We are attempting to electrically connect an SMA connector to two pieces of stainless steel to measure the capacitance between them for a school project. In the picture below, you can see the two ...
s0ggyj0hns0n's user avatar
0 votes
0 answers
45 views

Bluetooth transmitter headphone jack soldering points

I am in the process of modding a 7th gen iPod. I have purchased a Bluetooth transmitter/receiver from AliExpress (VALORO 2 IN 1 transmitter) andtaken the PCB out. Noe I am unsure what points to solder ...
ArrakisHackvist's user avatar
0 votes
1 answer
129 views

What temperature should I use to desolder a FPC connector by heating the back side of the PCB with a hot air gun?

I am learning how to use a hot air gun on PCBs. I saw some videos of FPC connectors being desoldered by heating the back side of the PCB with a hot air gun. I am assuming it is being done to prevent ...
Blurry Sterk's user avatar
1 vote
4 answers
87 views

How to match up soldering iron tip points with the right pad size?

Sometimes it's really difficult to understand the heat transfer mechanism on the PCB from the soldering tip because I can see that the solder melts but it does not stick to the soldering pad and it ...
Bubbly_Bh's user avatar
0 votes
2 answers
194 views

What model is this Weller pencil soldering iron?

I have this old Weller soldering iron that was issued to me at my first job in the early 80's. It has a lot of sentimental value to me. I was going to order some new tips and the one that is on it ...
Paul's user avatar
  • 1
0 votes
1 answer
74 views

How do I connect two RFID readers at the same time to my Arduino?

I’m making a simple door lock for my room using an Arduino uno and an RFID sensor, I made the code to unlock the door with the correct tag, but it’s only on one side, I need a way to unlock the door ...
Computer Noob's user avatar
0 votes
1 answer
137 views

How do you wire a usb type c female connector?

I'm modifying my Nintendo controller, and I need to solder some stuff onto the usb type c female plug. However, I noticed there are five pins, and I have no idea what a single one is. Could you ...
Noob's user avatar
  • 3
1 vote
1 answer
486 views

Hot air. Too hot or too slow?

I set my hot air device to 320 °C and at 20% flow. Using low melt solder paste it takes quite some time to desolder BGA chips which I think get singed! Increasing to 400 °C is faster but the tiny ...
Omowright's user avatar
1 vote
3 answers
220 views

Soldering problems, is it me

I have tried soldering together some very simple DIY projects, such as little kits with a few blinking LEDs and a transistor or two. My soldering is terrible and I confess not actually knowing what I'...
nuggethead's user avatar
  • 1,139
0 votes
0 answers
63 views

Connecting 2 LED strips and 1 driver

I have the following things: 1 5w 3in1 LED strip 1 10w 3in1 LED strip 1 20w 3in1 Driver The driver has 3 wires in output, 2 in input. The LED strips each have 3 ...
Sevil Dubariya's user avatar
1 vote
2 answers
75 views

Do LEDs turn on because of heat? [duplicate]

I was watching one of my seniors soldering a few SMD LEDs on one of his power converters. He touched the iron on the anode of one of the LEDs and it glowed. I think it is because of thermal generation....
Jonathan_the_seagull's user avatar
0 votes
1 answer
99 views

I'm having trouble figuring out which wire should be soldered where

I can't figure out which wire I need to solder to which part of the board. I can't find a schematic for this device anywhere. Тhe device is a Parrot MKI9100. This is the display cable.
Adnan 1's user avatar
8 votes
4 answers
2k views

How should I wire my circuit onto a perfboard?

I have built this circuit on a solderless breadboard, and now I want to build a permanent version. I have all the parts, I want to build it today. How should I put this on a perfboard? Note that I am ...
Mattman944's user avatar
0 votes
1 answer
180 views

Soldering paste for SMD on a laptop motherboard

I want replace a SOIC8 SMD EEPROM on my laptop's motherboard. I have both a hot air gun and a soldering iron. I bought tin-bismuth soldering paste (Tin 42% - Bismuth 58%), but then I saw on most SMD ...
servabat's user avatar
  • 160
0 votes
0 answers
76 views

Need suggestion to replace the thermal fuse of a heater

I got a mal-functioned heater from a community group. After diagnosis, I found one of the thermal fuse was blown. I got the replacement fuse and now face the question of how to replace it. The ...
Jack Hwang's user avatar
1 vote
2 answers
82 views

Proper Procedure for Extracting MQ Sensors from Breakout Boards

I'm working on a sensor array project using MQ-2,3,4,5,6,8, and 135 sensors. The bulky breakout boards would unnecessarily increase the PCB size, and purchasing bare sensors is not a cost-effective ...
FridgeDetail's user avatar
1 vote
1 answer
174 views

Identifying a socket contact - and finding a slightly larger size

I have this socket contact: (The image of the pin terminal to the right in only for size reference). I have identified this socket contact as ...
user1584421's user avatar
  • 1,359
2 votes
0 answers
91 views

How old is too old for BGA chips soldering

I need to buy a batch of UFGBA100 STM32 MCUs from a Chinese broker. I'm concerned that in the quote they specified that the chips will have a date code 19+ (4 years old). How can this affect ...
mactro's user avatar
  • 497
0 votes
1 answer
33 views

Replacing tact switches on MPC2000xl. Need help with one not responsive

I have replaced 40 small tact switches on my MPC2000xl four of which were not responsive. After some cleaning and desoldering I was able to get 3 working again. The last one has a burned contact pad ...
M45's user avatar
  • 1
1 vote
0 answers
90 views

What’s the difference between soldering iron wire wools?

What is the difference between the two different coloured wire wools for cleaning soldering iron tips? Both are being sold online by many sellers and both claim to be made from copper. Is one better ...
Danny Beckett's user avatar
0 votes
3 answers
204 views

Tips for soldering some wires into a PCB

I need to solder some wires into a PCB, im dont really master soldering small pads or pins, so i need some help. I have a question too, those pads are already tinned, soldered, so can i apply some ...
tote46's user avatar
  • 9
1 vote
1 answer
44 views

Identifying a connection terminal specification from photo

I'm having difficulty identifying the 12 pin connection as seen in the photos below. It appears to be a JST, but upon purchasing some 12 pin JSTs, they do not fit and are too big. Is there a way to ...
David jones's user avatar
2 votes
2 answers
97 views

Lifting Pins on SMT RJ45 Connector

I'm running into an issue with a specific RJ45 SMT connector where the I'm getting at least 1 pin lifting on >50% of the boards that run through our reflow oven. The rest of the components on the ...
timroberts's user avatar
0 votes
2 answers
144 views

How much current should a switching regulator consume on its own?

With your help on stack exchange, I finally finished assembling my first LM5143QRHARQ1-based buck converter! And it works! It does output 7V (well 7.03V) The only problem is that it consumes around 0....
Mito's user avatar
  • 411
13 votes
1 answer
3k views

What kind of soldering material is this?

I just saw a video of this gray goo that basically auto-solders small electronic components. I was wondering what this is, and where I can get some.
Nelson's user avatar
  • 233
0 votes
0 answers
78 views

Suitable intermetallic compound (IMC) thickness for solder joint

What is the suitable/recommended thickness for initial IMC layer formation right after the soldering stage without any thermal cyclic tests? I came across this system while diving into this topic: ...
Jaen39nc's user avatar
2 votes
1 answer
48 views

Do annular rings have any influence on the solder barrel fill?

Does the annular ring size on PCB has any impact on the level of solder barrel filling for wave soldering? I've came across some articles about annular rings affecting the plating on the hole, just to ...
Jaen39nc's user avatar
0 votes
5 answers
282 views

Tips for soldering a through hole GPIO hole onto solder pads

I want to solder like this: And here's the image source: https://sudomod.com/mintypi-custom-parts-guide/ Basically, I want to solder something with GPIO holes onto another board without using GPIO ...
Jazz Handy's user avatar
0 votes
3 answers
91 views

Capacitor Operating Temperature Range

Our .0047uF G 630 Vdc axial cap has an operating range of -40C - +85C. If the wave solder temp reaches 105C won't the cap be damaged, or possibly have an altered tolerance range?
Steven Carpenter's user avatar

1
2 3 4 5
32