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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3answers
168 views

How to deal with really tiny op-amps?

Every time I order an op-amp from DigiKey the op-amp arms are waaaay too small. Too small to prototype in my circuit board, and sometimes too small to solder. Is my only option to make a custom PCB, ...
0
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1answer
63 views

Soldering Nichrome wire to Stainless steel and steel to PCB

Is it possible to solder Nichrome wire (30AWG) to stainless steel and then the steel to a PCB?
0
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3answers
64 views

Help needed with soldering SPI flash (MX25L8006E)

Ok so I want to first remove a SPI flash (MX25L8006E) from the pcb and then after modifying its content using Arduino put it back on. How to do this safe? First on I only have a soldiering iron (30W) ...
0
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0answers
37 views

What Soldering Iron and Other Equipment Should I Get As a Beginner DYIer? [on hold]

I have a physics and basic electronics background. However, I want to ramp up my electronics and EE projects to a higher level. In particular, I was looking to assemble some DIY kits to shake the rust ...
0
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3answers
69 views

New soldering iron smokes from inside the handle (not from tip) - is this a problem?

I've started using a brand new soldering iron for the first time and it's not working as expected: After about 10 seconds of power, smoke starts coming out from inside the handle, next to the metal ...
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2answers
55 views

Eagle has different shape for pads for through hole components why?

While I understand that have 2 distinct shapes helps in determining which is pin 1, why does eagle have so many shapes: square, round, octagon, long, offset. Which is recommended under what ...
3
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1answer
59 views

Why do all soldering irons have long barrels?

Why do all soldering irons have long barrels? Even temperature controlled ones? I can understand that it helps regulate the temperature of a tip if the heating element emits a constant power of heat. ...
3
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6answers
653 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
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3answers
1k 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 ...
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1answer
64 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
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2answers
84 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
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1answer
937 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
66 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
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4answers
78 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
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0answers
85 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
77 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
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1answer
74 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
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1answer
49 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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1answer
52 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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1answer
114 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
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1answer
84 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
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3answers
105 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
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1answer
79 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 ...
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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
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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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1answer
36 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
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1answer
92 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 ...
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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 ...
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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
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1answer
51 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
385 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
158 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
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1answer
67 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
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3answers
149 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
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2answers
136 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
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2answers
139 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
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1answer
70 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
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1answer
67 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
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1answer
92 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
67 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
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1answer
246 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
43 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
89 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
464 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
90 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
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1answer
186 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
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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
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2answers
786 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
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1answer
59 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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3answers
88 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 ...