Questions tagged [surface-mount]

Surface-Mount Technology (SMT) refers to the way components are mounted on a PCB: SMDs (Surface-Mounted Devices) have pins or contacts which lay on top of the PCB's pads, without the need for holes in the PCB.

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7
votes
4answers
2k views

Cheapest TQFP-44's & SO-28's to practice SMD soldering?

I'm looking for a cheap source of broken/outdated TQFP-44 and SO-28 ICs or packages which I can test my soldering skills with. The chips I'm using are £3 each and this is money I'd rather not throw ...
5
votes
3answers
17k views

TSOT-23-6 vs SOT-23-6

What is the difference between a TSOT-23-6 and a SOT-23-6? I know one is thinner. But in what dimension? I have looked in my PCB editor and they both have the same footprint. Any clarity appreciated!...
42
votes
8answers
5k views

What tools, equipment, and techniques do you use to solder fine-pitch SMT parts?

Possibly many questions have been asked on soldering smd parts, but I haven't found specific answers, Like: Do you use a watchmakers lens or some other type of magnifying glass while soldering these ...
9
votes
12answers
36k views

What is the best type of magnifier to use for general electronics duties?

I am looking for a magnifier tool for an electronics workbench and was wondering what sort of product would be best. The device must be an all-rounder capable of doing some SMT as well as through ...
9
votes
4answers
20k views

What kind of damage could a soldering iron do to a component?

As a follow-up to this question, what kind of damage could a soldering iron do to an IC or other component if left on it for too long at too high a temperature? ESD damage can be subtle, for instance....
5
votes
5answers
6k views

What is the best way to heat sink a chip when soldering it on?

I generally like to solder sockets to my boards, rather than the chip directly, but am now forced to solder the chips directly. I have several DIP and SMD components that this needs to be done with. ...
18
votes
13answers
5k views

Recommended PCB houses / Assemblers [closed]

Can anyone recommend a good place to go making PCB's? I'm particularly interested in places that also offer assembly, because this makes SMD parts an option. GoldPhoenix is an option, but not the ...
22
votes
8answers
3k views

Pre-programming surface mount ICs

I'm trying to set up a PCB with an atmega168 and no programming header. I intend to use a serial bootloader (there is a ft232 on the board) to reprogram but I am wondering about the best way to ...
7
votes
5answers
2k views

SMD solder now or later?

I'm soldering up some boards with smd parts, using a hot plate to reflow, and I'm (inevitably) realizing that I got some of the wrong parts. Now, is it better to leave the boards with smd components ...
9
votes
2answers
494 views

Stencil apertures

When ordering a desktop stencil for laying down solder paste, there is an option to specify the stencil's aperture. Rectangular, home plate, trapezoidal...what's the difference between them? Is ...
4
votes
1answer
122 views

Specs on Siliconix SSTC34-T1

I have been gifted about 2/3 of a reel (2000-ish) of these SOT-23 parts but I cannot locate any data for them. Can anyone point me in the right direction. Through the various datasheet sites I have ...
19
votes
9answers
3k views

Sizing SMD components for Hobbyist Kits

More components are only available in SMD packages. For hobbyist assembly the options are to buy breakout boards or solder SMD. Since components are usually packaged in a couple of SMD package ...
15
votes
8answers
11k views

DIY SMT Reflow: Toaster Oven, Skillet or?

I've read quite a few write ups on converting toaster ovens or skillets for reflowing SMT components. The important parts appeared to be: Attempting to match a reflow profile (temperature pattern to ...