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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6answers
624 views

Why are there no easy-to-solder SMD diodes in 0603 packages?

What seem to be the most popular SMD diodes currently come in SC-79 packages, but they super tiny and really hard to hand solder... ...and they also can be a hassle even for reflow. So I thought ...
7
votes
2answers
910 views

What's the advantage of lead-free solder containing silver?

I'm looking to buy some lead-free solder. There appears to be two different kinds available, tin-copper alloys and tin-copper-silver alloys. What advantage does the latter have, as it is more ...
-1
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1answer
55 views

Mono jack output to stereo headphones : how to send the mono signal to both sides?

I have a 3.5mm jack mono output. I'm plugging standard stereo headphones into this jack, and it plays only on one side. I want the sound to come out on both sides in the headphones (same signal, but ...
1
vote
2answers
71 views

Soldering 19-Pin HDMI Female Connector

I am looking to solder this 19 pin hdmi cable with small wires (possible a single wire) to convert it to another connector. I expected the connector to be a have bigger spacing between the pins. ...
4
votes
1answer
925 views

Are there any disadvantages of having many solder joints on a single wire?

I was working on this project where I have to connect multiple wires from a single supply wire. Are there any dis advantages of having many solder joints on a single wire?
0
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1answer
62 views

9V battery positive soldering pad went off from my circuit board

OK, so I got a little problem. Today I was soldering something on this circuit board and the positive wire tore apart. I had to resolder the wire, but when I was heating up the old solder to remove it,...
0
votes
4answers
75 views

Empty Solder Points On PCB?

first time here. Today, I was looking on my motherboard/graphics card and I noticed tiny little pin width points of solder with nothing soldered to them. The distance between most of them are just ...
0
votes
0answers
84 views

Repair heat shrink damage

I have spent literally about two hours wiring up a cable to an adapter. I finally got it connected but I pierced one of the heat shrink sleeves. The adapter sleeve is made of metal and obviously I ...
1
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2answers
70 views

What is resin cored solder wire?

Recently I went shopping for more electrical components and in my list was solder wire. I bought one reel of solder wire from an indigenous company called Oswal. It is a 60/40 tin:lead solder wire. ...
0
votes
1answer
59 views

how to solder MEMS microphone to PCB at home? [closed]

I would like to experiment with audio applications using MEMS microphone. The problem is i cannot think of a way to solder these microphones on a pcb as PCB prototype manufacturers that i know won't ...
0
votes
1answer
42 views

Senseo & Raspberry PI soldering circuit board

I am kinda new to the whole hardware stuff and as an amateur I am working on a little project. I would like to connect my senseo machine to my Raspberry Pi. I've got a senseo HD7810 and a Raspberry Pi ...
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votes
1answer
50 views

Arcade stick PCB not working as expected

I am using Logitech precision PCB to make an arcade stick. I am having a problem in button 1 (green) area. While I try to solder button 1 via R2, I had a great difficulty - R2 resistor moved every ...
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votes
1answer
111 views

How do I solder this red part in PCB?

I am making an arcade stick. I was making good progress on the right hand side but now stuck on this red circle bit. For the RHS I had this socket(?) that I can put solder on easily But this red ...
0
votes
1answer
80 views

Best way to solder connections between header posts?

I have a project that uses about 200 solderless jumper wires connecting header posts from one circuit board to the next. Now that the whole thing works, I want to ditch the "temporary" connections in ...
0
votes
3answers
98 views

Can anti-static tweezers replace wrist straps?

I need to solder ESD-sensitive components. Can I get rid of my ESD wrist strap if my tweezers are anti-static?
0
votes
1answer
76 views

Wave Solder an Alkaline Battery on a PCB (any concerns)? [duplicate]

I have a specific application that requires a board to be powered by Alkaline batteries and would like to solder direct to the PCB using wave solder vs. hand solder (need to consider a high volume ...
-3
votes
1answer
38 views

Solder old Home-Cinema wire to Audio Jack Plug [closed]

So I have this ancient Home-Cinema (Panasonic SA-HT540) and the main unit appears to be broken. The speakers should work just fine though. I'm planning to solder the speaker-wire (which is a simple +/...
30
votes
2answers
3k views

Why are SMD LEDs shipped in a sealed bag containing desiccant?

I had a selection of 0805 LEDs in my last Mouser order and was a bit surprised to discover they arrived in heat-sealed (rather than folded and taped with sticker) bags containing a desiccant bag and ...
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votes
1answer
35 views

Solder multiple microphone cables [closed]

so I want to build a program that is going to turn on specific microphones through out the building. But that is not the problem, the problem is that I obviously need multiple microphones to place ...
2
votes
1answer
83 views

Soldering to PCB edge connector coated for FPC contact

Figure 1. (1) Lenovo keyboard controller (upside down), (2) keyboard membrane lower layer and (3) upper layer. The spacer layer is just about visible around the contact dots. I'm building a ...
0
votes
2answers
57 views

Connecting and soldering audio cable of several earbuds, but none is working

I have about 10 sets of earbuds accumulated over the years, where just one of the two is working or the jack is broken, so I thought to try to fix them. I've tried mixing several of them, in example ...
0
votes
0answers
37 views

Verifying Pin In/Out Connections

I'd like to verify that what I'm planning to do will work before purchasing a preamplifier. I want to bypass the need for a case to interface with the preamplifier and want to just solder to the ...
0
votes
1answer
47 views

Best way to prototype a TDFN package chip (MAX9814 and MAX9820)?

For my engineering project, we wanted to use the gain control and amplifier available on these two chips, but are finding difficulty with prototyping them as they are so tiny. One of the chips is a 14 ...
2
votes
2answers
375 views

Accidentally removed SMD pad

I had been attempting to desolder some SMD ceramic capacitors off a PCB to measure their capacitance. Unfortunately I am quite new to soldering and have managed to screw up. The below picture shows ...
5
votes
5answers
136 views

How to test SMD bluetooth modules without soldering them to a board [duplicate]

I have made a costum PCB with components and a WT51822-S2 bluetooth module. After testing, there seems to be a low percentage of modules that have a fault in them. Since they are SMD modules, with ...
1
vote
1answer
66 views

Ease of use of SMD Led components [closed]

I was thinking about inserting some lights in postcards. But classic leds would increase the thickness too much. Is it easy enough to use this kind of component for a simple circuit(just one or two ...
1
vote
3answers
146 views

Can I use this 950° soldering iron on electronics?

I purchased this soldering iron yesterday and after doing some research I'm not convinced it is safe to use on electronics. It doesn't state the wattage anywhere and I can't find it online. It only ...
3
votes
2answers
127 views

Possible to Solder top of through-hole header?

I have designed a small 2-sided PCB with through-hole parts, which I plan to have fabbed professionally. Given the lack of space (2"x2" was a design constraint to keep costs low, as I will need a ...
0
votes
2answers
130 views

How safe is my soldering iron? [closed]

I'm have a low cost (<2$) soldering iron, similar to the one shown in the image, except that it has 3 plug terminals. Suddenly something got me thinking about safety, out of curiosity I cut the ...
0
votes
1answer
67 views

Mounting a LCD display to a PCB

I'm working on a project that involves this LCD for a PCB. From the drawing, I can easily tell how to connect the pins. But I am not sure how to tell from the drawing how the display should be ...
0
votes
1answer
62 views

One flux for all electric soldering?

My understanding is that standard electrical soldering fluxes will not be effective on aluminum or stainless steels. Is that correct? But are all rosin fluxes adequate for the other metals ...
0
votes
1answer
91 views

Moderately easy computer circuit to build? [closed]

I have a project were I need to make a circuit, and I want to make a circuit that I can put into my computer, maybe in the PCI-E slot. I was thinking of maybe building a capture card or sound card, ...
3
votes
1answer
65 views

Soldering Caps Across Motor Terminals

I'm trying to solder 0.1uF capacitors across DC motor terminals to suppress motor noise, as seen here and here, but it's impossible to solder to the motor case. Motor case never holds the solder. ...
0
votes
1answer
245 views

Diagnosing potential damage to garden solar light

I'm just getting started with electronics and so for a simple project I tried to desolder the LED from a garden solar light in order to attach a female header (I trimmed it to 2 pins). My intention ...
0
votes
1answer
40 views

What type of wire should be used for 230 v ac while using this relay

I want to drive a 230v bulb with the help of a relay, so I soldered a 5v relay on a perforated board with a transistor driver circuit which is working perfectly fine. The relay I am using is HL JQC-...
0
votes
3answers
88 views

How quickly would a pocket blowtorch ruin PCB traces?

I need to remove an obtrusive Mini USB port from a small PCB, and I initially wanted to use my Soto Pocket Torch to melt all of the leads at once and remove it. I've tried desoldering braids and ...
12
votes
6answers
443 views

Desoldering a tricky DC jack

I'm trying to replace a faulty DC power jack on a laptop, and having quite a difficult time with it. At this point, I'm not sure if the problem is with my equipment, or my technique. Equipment: ...
0
votes
1answer
87 views

How to avoid damaging vacuum tubes and gas-filled tubes during soldering?

Is it possible to damage a vacuum tube or gas-filled tube while soldering to it (thermal shock?), and if so, are there any special precautions that should be taken while soldering tubes to avoid ...
0
votes
1answer
156 views

USB Charge and data separate cables

Is it possible to split micro USB to USB cable so two cables (data + and data -) go to the PC with USB and two other power cables go to power brick?
6
votes
1answer
494 views

White solder pads on through-hole PCB

They look like covers at first glance but they aren't stickered on. I've never seen pads like this and searching doesn't bring up any results. Any information on these?
2
votes
2answers
762 views

Why not make soldering iron tips out of tin?

It seems illogical to me to make a soldering iron tip out of steel coated copper. If tin is a superior material (notice the anachronistic use of the term "tinning" used today), then why not just make ...
0
votes
1answer
58 views

Electronic soldering and repair for a newbie

So, recently, I've been trying to get more skilled with electronics to prepare me for college, starting with soldering. I mentioned this to someone I know, and he gave me his broken E-Cig, saying I ...
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votes
3answers
86 views

how can we make a signal out of a 2 pin mic output

ok im looking to make this type of setup so that i can use its output pin to read via analog. this is the mic i got and would like to make that 3rd pinout which as you can see it only has 2 and ...
-1
votes
1answer
47 views

How much track width should I leave while soldering metallised polypropylene capacitors carrying around 6.25 Amps?

I am not using a PCB for this and I would be soldering on a dot board and making the PCB tracks myself. I was advised that I make the solder tracks as wide as possible for allowing high current to ...
-2
votes
1answer
89 views

Fumes from soldering [duplicate]

I breathe alot of soldering fumes and i don't have anything that is used to remove this fumes while soldering, is it really bad for my health? How it affects the brain and other organs?
2
votes
1answer
132 views

I2C camera not working 100% of the time

This is my stereoscopic system: I'm using a zedboard to pilot two i2c-camera MT9D111: http://www.dragonwake.com/download/camera/MT9D111/mt9d111_rev5.pdf Camera PCB Information: https://drive....
1
vote
1answer
62 views

How to check female header connection?

I am very inexperienced at electronics, but I have recently tried to connect a wireless chip to my microcontroller. I soldered some header pins to my board to allow me to remove the chip when needed ...
1
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3answers
79 views

Soldering error with wire

I was soldering a magnet wire with a normal copper wire, and while doing that, i burned a small part of the magnet wire, so will this affect the conductance of the wire??
4
votes
2answers
184 views

100nF MLCC bypass capacitor spontaneously exploding on 3.3V bus, how does this even happen?

A 1608/0603 multilayer ceramic chip capacitor was functioning as a bypass capacitor for the 3.3V supply of a InvenSense MPU-6050 6 axis (gyro + accelerometer) MEMS sensor. It somehow exploded forming ...