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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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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1answer
61 views

What do Red/Copper, Blue/Copper and Green/Copper headset wires mean? [closed]

I cut open a headset wire and found three wires I haven't seen before. The wire has red, blue and green wires and all of them are spiral wrapped with a copper wire, also, none of them seem to have ...
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1answer
37 views

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

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
32 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 ...
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1answer
69 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
53 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
35 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 ...
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1answer
36 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 ...
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2answers
349 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 ...
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5answers
102 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 ...
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1answer
64 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 ...
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3answers
131 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 ...
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2answers
113 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 ...
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2answers
120 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 ...
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1answer
59 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 ...
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1answer
57 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 ...
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1answer
84 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
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1answer
59 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. ...
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1answer
167 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 ...
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1answer
35 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 ...
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0answers
25 views

Stencilling and mounting BCM2835

Is using a basic stencilling technique (like this one: https://www.youtube.com/watch?v=WDIqtGMROjM) to mount a BCM2835 chip or one with similarly small contacts practical?
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3answers
86 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 ...
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6answers
431 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: ...
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1answer
74 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 ...
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93 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?
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488 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?
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2answers
720 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 ...
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1answer
54 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
72 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 ...
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1answer
42 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 ...
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1answer
81 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?
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1answer
119 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: ...
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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 ...
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3answers
78 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??
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2answers
166 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 ...
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1answer
92 views

Desoldering a TO-220 MOSFET from a plated through-hole board with SMD complications

I'm planning on replacing a TO-220F package MOSFET on a through-hole circuit board that also has SMD components on it. In this case, an SMD capacitor is connected to the source gate of the MOSFET by ...
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1answer
199 views

Hand soldering QFP component

I recently came across this video on YouTube, in which the guy is soldering a .5 mm QFP component. Hand soldering a .5 mm QFP Chip As I haven't done a lot of soldering in my life (and never used ...
3
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1answer
117 views

Solder paste stencil application

I am trying to do reflow soldering with a stencil for the first time. I have done some reflow soldering before, but every time I manually applied the paste using a small syringe + needle. These ...
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1answer
30 views

How to connect Phone to Robot while charging phone from external battery?

I am controlling a robot via usb from an Android phone running the robot's code. This phone has a poor battery and I need to extend its life with a USB charger (can't change phones). How can I charge ...
3
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2answers
98 views

ENIG or HASL for prototype with small pitch and expectation to need rework

I have a project where I'm about to order the PCB's for a first prototype, and I'm staring at the option of HASL vs. ENIG on the website. I will hand solder it with an iron, the smallest pitch part is ...
0
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3answers
78 views

Soldering SOT-23

I'm working on a DYI battery monitor project and the possibility of using an INA169 came up. That's a SOT-23 packaged component. I have minimal soldering skills so I'm looking for some advice: Can I ...
7
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4answers
1k views

Soldering iron tip grinding

I have an ordinary Weller soldering iron with a conical tip, which I fear does not transfer much heat to the area. Since I am planning to do a dead bug project I thought it would be better to get a ...
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1answer
53 views

ET-3400A soldering questions

I recently got an et-3400a and there is no model for it online, there is one for the et-3400 though, I was wondering what the spots marked AA, AB, ST1, ST2, etc.. do or just the raindrop shaped ...
0
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1answer
58 views

how do you link components between them on a protoboard [duplicate]

I have the following protoboard (see picture below) Each hole has a distance of 0.5mm I want to link components between them. I found a few ways to do that: 1) Use tiny wires to connect the ...
1
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8answers
408 views

Connecting / Soldering a Switch to Breadboard / PCB

I'm pretty new to electronics and I have just found these toggle switches. But I can't figure out how the connectors on the bottom are called in the english language .. :) And also, is there a way to ...
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0answers
71 views

Nixie Tube Clock Kit Issues

I recently purchased the Lena kit from Nixiekits.eu http://nixiekits.eu/Laura+Lars.htm The manual: http://nixiekits.eu/Downloads/USB_Nixie_Clocks_Aufbauanleitung.pdf After putting it together ...
2
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1answer
83 views

Connecting DB25 socket to protoboard/breadboard

I need to connect a DB25 connector to a breadboard. One way I can think of is buying a solder-cup connector (e.g. http://www.digikey.ca/product-detail/en/171-025-103L001/225ME-ND/858135) and wiring it ...
0
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1answer
121 views

Extending solder only PCB pins

What is the recommended way to make solid connections to the pins below? Can the soldering be avoided, and if not, what component should be used to provide the plug/unplug connection?
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51 views

CJMCU-75 — seting the I2C adress

I just got embedded system CJMCU-75 which has LM75A I2C temperature sensor on top of it. I dig into the LM75A documentation and found out that it's I2C address consists of four fixed MSB and three LSB ...